Scientific analysis of aeolian sand environments is fundamental for sustainable disaster mitigation along desert highways.However,significant regional variability in wind energy conditions complicates accurate charact...Scientific analysis of aeolian sand environments is fundamental for sustainable disaster mitigation along desert highways.However,significant regional variability in wind energy conditions complicates accurate characterization of wind regimes and introduces uncertainty in determining optimal monitoring timescales.Moreover,prevailing sand control measures often rely on standardized designs rather than site-specific adaptive strategies.To address these issues,this study proposes an integrated framework for aeolian environment analysis and develops targeted disaster mitigation strategies tailored for desert highways.The proposed framework employs wavelet transform to unravel the periodic characteristics of wind speed time series and integrates multi-source data(including ERA5 wind datasets,sand samples,ASTER GDEM,and multi-temporal remote sensing imagery)to enable a comprehensive aeolian environmental assessment.Concurrently,a suite of adaptive strategies is formulated to mitigate disaster risks along desert highways.Validated through a case study of the Tumushuk-Kunyu Desert Highway in Xinjiang,China,the framework exhibits high accuracy:predictions of annual aeolian sand transport activity show relative errors mostly below 7%against long-term reference sequences,and the calculated resultant drift direction exhibits a strong correlation with observed dune migration,yielding an R-squared value of 0.96.These findings confirm the framework’s reliability and provide a robust basis for designing adaptive,location-specific mitigation strategies,thereby enhancing the sustainability of desert highway infrastructure.展开更多
Highways are a vital component of global transportation infrastructure,but their environmental impact,particularly in terms of carbon emissions,poses significant challenges to achieving global sustainability and clima...Highways are a vital component of global transportation infrastructure,but their environmental impact,particularly in terms of carbon emissions,poses significant challenges to achieving global sustainability and climate goals.This literature review discusses the new area of low-carbon highways,including next-generation construction technologies and near-zero carbon operation strategies.It discusses the purpose of innovative materials,such as low-carbon cements,recycled asphalt,and geopolymers,and intelligent infrastructure solutions,including intelligent traffic control and electric vehicle charging systems.The article also explores the significance of Lifecycle Assessment(LCA)and carbon accounting in the measurement and minimization of the carbon footprint of highways.Even though a lot of progress has been made,there are still several technical,economic,and regulatory obstacles,among which are the prohibitive initial cost of low-carbon technologies and the non-standardization of policies.The future outlook indicates that to alleviate these challenges,a coordinated effort among the research,policy,industry,and communities is necessary.Low-carbon highways can help to have a robust,sustainable transport system that meets global climate goals by incorporating sustainable processes in highway design,construction,and operation.展开更多
Investigating the wind-sand flow response regularity in the longitudinal slope sections of desert highways provides a scientific basis for selecting the slope of desert roads.This study uses the Tengger Desert section...Investigating the wind-sand flow response regularity in the longitudinal slope sections of desert highways provides a scientific basis for selecting the slope of desert roads.This study uses the Tengger Desert section of the Wuhai-Maqin Expressway as a case study,employing CFD numerical simulation methods to calculate and analyze the wind-sand flow field distribution characteristics in different longitudinal slope sections.The results show that:(1)Along with the direction of the incoming flow,the windward and leeward slope toes of the embankment are low-wind-speed zones,with the wind speed at the leeward slope toe being even lower.The higher the embankment,the larger the low-wind-speed zone at the windward and leeward slope toes.As the longitudinal slope increases,the extent of the lowwind-speed zone at the same location along the route also increases.(2)Along the route direction,the wind speed at the windward and leeward slope toes decreases as embankment height increases.At the embankment toe,sand particles are transported from the top to the bottom of the longitudinal slope,and the greater the longitudinal slope,the stronger the transport effect.(3)Along the route direction,the sand accumulation around the embankment gradually gathers toward the bottom of the longitudinal slope as the slope increases.When the longitudinal slope is 3%and 4%,the trend of sand accumulation moving from the windward side at the end of the route to the leeward side at the start of the route is more significant.When the longitudinal slope is less than or equal to 3%,severe sand accumulation within the embankment range is reduced by 86.4%or more compared to when the slope is 4%.(4)Under the same longitudinal slope,the higher the embankment height,the smaller its transport rate.When the embankment height is the same,the greater the longitudinal slope,the greater the embankment transport rate.展开更多
Sand control engineering plays a pivotal role in ensuring the safe operation of transportation corridors that traverse desertified areas.Evaluating the effectiveness of these interventions provides a crucial scientifi...Sand control engineering plays a pivotal role in ensuring the safe operation of transportation corridors that traverse desertified areas.Evaluating the effectiveness of these interventions provides a crucial scientific basis for mitigating aeolian hazards and guiding the sustainable management of fragile and arid ecosystems.In this study,we investigated a representative section of Highway S315,which is prone to windblown sand hazards,in Ejin Banner,northern China.By integrating segmented measurements with unmanned aerial vehicle(UAV)-based oblique photogrammetry,we quantitatively characterized the spatial and temporal evolution of sand accumulation around multiple sand control structures and assessed their blocking efficiency.Complementary road sand-removal records and meteorological observations were analyzed to evaluate the long-term performance of engineering measures.Our results showed that sand accumulation behind high vertical sand barriers typically exhibited a triangular cross-sectional morphology,with a gently inclined stoss slope and a steep lee slope.The shape and volume of these deposits evolved dynamically in response to variations in the prevailing wind regime,reflecting strong feedback between barrier geometry and local airflow redistribution.In contrast,the low-profile checkerboard sand barriers displayed a three-stage morphological trajectory—initial accumulation,edge intensification,and functional decline—indicating a progressive loss of sand-trapping capacity as burial proceeded.Sand accumulation was markedly greater on the highway's western(upwind)side than on the eastern(downwind)side,with 70.0%–90.0%of the airborne sediment flux intercepted by the upwind structures.From 2015 to 2020,mean annual wind speeds remained stable(2.68±0.04 m/s),while precipitation varied from 22.6 to 103.7 mm.However,the annual sand removal volume from the road decreased consistently,confirming the enhanced mitigation effect of multi-level protective system.These findings highlight the coupled interactions between engineering design,wind–sand dynamics,and topographic context.Beyond their immediate protective role,well-designed sand control systems also contribute to the prevention of regional desertification by stabilizing mobile dunes and fostering conditions favorable for ecological restoration.The insights gained here provide both theoretical and practical support for optimizing sand control engineering and advancing sustainable hazard mitigation in arid and semi-arid areas.展开更多
To uncover the decision-making mechanisms and evolutionary dynamics of multiple stakeholders in highway noise pollution control,a three-party evolutionary game model involving the government,operators,and the public i...To uncover the decision-making mechanisms and evolutionary dynamics of multiple stakeholders in highway noise pollution control,a three-party evolutionary game model involving the government,operators,and the public is constructed.The operation period is divided into different stages for differentiated analysis.A simulation analysis was performed on the Lituo sinking section of the Beijing-Hong Kong-Macao Highway to assess the impact of variations in critical elements on the system.The results indicate that the Lituo sinking section of the Beijing-Hong Kong-Macao Highway is currently in its early stage of development,with the corresponding strategies being active regulation,excessive emissions,and supervision.When the cost of the government’s active regulation decreases from 1×10^(5) to 5×10^(4) yuan,the system converges more rapidly toward the active regulation strategy.When the cost of the operator’s excessive emissions increases from 14.08×10^(6) to 20.00×10^(6) yuan,the system drives the operator toward the standardized emission strategy.In addition,when the cost of public supervision decreases from 15×10^(4) to 5×10^(4) yuan and the compensation paid by operators to the public increases from 1.288×10^(6) to 2.576×10^(6) yuan,the system converges more quickly toward the supervision strategy.The cost of the operator’s excessive emissions serves as the core decision variable for achieving the ideal equilibrium in the three-party game involving government active regulation,operator standardized emissions,and public supervision.展开更多
As a key node of modern transportation network,the informationization management of road tunnels is crucial to ensure the operation safety and traffic efficiency.However,the existing tunnel vehicle modeling methods ge...As a key node of modern transportation network,the informationization management of road tunnels is crucial to ensure the operation safety and traffic efficiency.However,the existing tunnel vehicle modeling methods generally have problems such as insufficient 3D scene description capability and low dynamic update efficiency,which are difficult to meet the demand of real-time accurate management.For this reason,this paper proposes a vehicle twin modeling method for road tunnels.This approach starts from the actual management needs,and supports multi-level dynamic modeling from vehicle type,size to color by constructing a vehicle model library that can be flexibly invoked;at the same time,semantic constraint rules with geometric layout,behavioral attributes,and spatial relationships are designed to ensure that the virtual model matches with the real model with a high degree of similarity;ultimately,the prototype system is constructed and the case region is selected for the case study,and the dynamic vehicle status in the tunnel is realized by integrating real-time monitoring data with semantic constraints for precise virtual-real mapping.Finally,the prototype system is constructed and case experiments are conducted in selected case areas,which are combined with real-time monitoring data to realize dynamic updating and three-dimensional visualization of vehicle states in tunnels.The experiments show that the proposed method can run smoothly with an average rendering efficiency of 17.70 ms while guaranteeing the modeling accuracy(composite similarity of 0.867),which significantly improves the real-time and intuitive tunnel management.The research results provide reliable technical support for intelligent operation and emergency response of road tunnels,and offer new ideas for digital twin modeling of complex scenes.展开更多
On September 5,2022,an M_(S)6.8 earthquake struck Luding County,Kardze Prefecture,Sichuan Province—an area that is particularly vulnerable to geological changes.The earthquake caused considerable damage along the hig...On September 5,2022,an M_(S)6.8 earthquake struck Luding County,Kardze Prefecture,Sichuan Province—an area that is particularly vulnerable to geological changes.The earthquake caused considerable damage along the highway,leading to road disruptions and blockages,further isolating earthquake-stricken areas.Accordingly,a rapid survey of the main highways in this area was conducted,and 507 damage points were identified.Roadbed damage accounted for more than 70%of the total damages.Co-seismic disasters were primarily distributed along the highways on both sides of the Dadu River in the reservoir area of the Dagangshan Hydropower Station,Caoke Township,and Detuo Township.Further,six factors under three categories of the spatial distribution of highway damage in the earthquake-stricken areas were analyzed.The rate of highway damage was positively correlated with the seismic intensity but negatively correlated with the fault and river distances.The earthquake intensity had the most significant impact:37.5%of road disruptions were found in areas with an intensity of IX;this percentage was 1.6 and 5.8 times greater than those found in areas with intensities of VIII and VII,respectively.The roads with the most significant damage were in regions with intensities above VIII,faults within 5 km,slopes within 30°–70°,rivers within 100 m,and the presence of granite.This indicated that these factors aggravated highway disruption,resulting in more than 90% of damaged highways in strongly shaken regions.Our findings may provide guidance for efficient highway recovery following earthquakes.展开更多
The Senegalese Sovereign Fund for Strategic Investment(FONSIS)has recently signed a partnership agreement with the Chinese company Sinohydro to construct the country’s first“water highway.”This project is part of t...The Senegalese Sovereign Fund for Strategic Investment(FONSIS)has recently signed a partnership agreement with the Chinese company Sinohydro to construct the country’s first“water highway.”This project is part of the new Senegalese government’s water transfer initiative,the Grand Transfert d’Eau(GTE)project,which aims to ensure a sustainable supply of drinking water and support the agricultural sector.展开更多
Highway planning requires geological surveys and stability analysis of the surrounding area.In the early stage of the survey,the modeling and stability analysis of the survey area can be carried out by using GIS softw...Highway planning requires geological surveys and stability analysis of the surrounding area.In the early stage of the survey,the modeling and stability analysis of the survey area can be carried out by using GIS software to intuitively understand the topography of the study area.The use of DEM to extract terrain factors can be used for simple stability analysis and the source data is easy to obtain,simple to operate,fast to analyze,and reliable analysis results.In this paper,taking the X104 road section in Ganxian County as an example,the ArcGIS platform is used to carry out 3D modeling visualization and stability analysis,and the stability evaluation map of the study area is obtained.展开更多
Roadside habitat through major urban areas may offer remnant examples of natural grasslands.These habitats may be subjected to frequent as mowing and exposure to automobile emissions and runoff.This study was conducte...Roadside habitat through major urban areas may offer remnant examples of natural grasslands.These habitats may be subjected to frequent as mowing and exposure to automobile emissions and runoff.This study was conducted on interstate highway right-of-ways in San Antonio,Texas,U.S.A.We compared the vegetation species and diversity,and the organic carbon of leaf litter,plants,and soils.Two non-native grasses accounted for 50.9% cover,while all native forbs and grasses accounted for only 9.8% cover.The mean biomass of nonnative grasseswas 4.5 times greater than that of all native species.Organic carbon content of leaf litter,plants,and soils was variable among the study sites,possibly due to management practices and a drought that occurred during the study.Themean organic carbon content in the upper 20 cm soil was 5.0 kg C/m^(2) and organic carbon content was greater in the upper 10 cm than organic carbon in the 10.1 to 20 cm portion.Cynodon dactylon and Bouteloua curtipendula exhibited the greatest photosynthesis efficiency indicating these grasses are more adaptable to hot summer temperatures found in Central Texas.The organic carbon content along a major interstate was 13,793 kg·C/ha for leaf litter,vegetation,and the upper 20 cm of the soil.We conclude that interstate highways provide habitat for some native species,but the vegetation along right-of-ways is dominated by two non-native grasses.It appears unlikely that roadside habitat can be restored to resemble native grasslands without large scale and costly restoration efforts.展开更多
Aiming at the problems of difficulty in balancing construction efficiency and quality,as well as the high safety risks of working at heights during the construction of main piers for highway bridges,this study takes a...Aiming at the problems of difficulty in balancing construction efficiency and quality,as well as the high safety risks of working at heights during the construction of main piers for highway bridges,this study takes a specific bridge project as an example to introduce the technology of hydraulically sliding formwork for the construction of main piers of highway bridges.An in-depth analysis of the project’s construction process found that this technology can effectively improve construction efficiency,ensure the quality of concrete pouring,and significantly reduce the potential safety hazards of working at heights.It provides a reliable technical solution for constructing the main piers of highway bridges and has important reference significance for similar projects.展开更多
This article focuses on traffic safety management during the reconstruction and expansion of highways,with the research objective of understanding traffic safety management issues and exploring more effective traffic ...This article focuses on traffic safety management during the reconstruction and expansion of highways,with the research objective of understanding traffic safety management issues and exploring more effective traffic safety management measures.The research employs practical observation and logical analysis as research methods.Firstly,it elaborates on the connotation of traffic safety management during the reconstruction and expansion of highways,analyzes its key points,and affirms its management value from different perspectives.It provides a detailed analysis of issues such as the weak foundation of traffic safety management systems and the inadequacy of comprehensive traffic safety management,and interprets the restrictive impact of related issues.Based on the manifestation of relevant issues,strategies such as strengthening the institutional foundation of traffic safety management and constructing a comprehensive traffic safety management system are proposed,aiming to provide traffic safety management references for relevant enterprises.展开更多
This article focuses on the management of large-scale machinery and equipment in highway construction,with the research objective of identifying issues at the management level and exploring more effective management m...This article focuses on the management of large-scale machinery and equipment in highway construction,with the research objective of identifying issues at the management level and exploring more effective management measures.Through practical observation and logical analysis,this article elaborates on the management connotations of large-scale machinery and equipment in highway construction,affirming its management value from different perspectives.On this basis,it carefully analyzes the problems existing in the management of large-scale machinery and equipment,providing a detailed interpretation of issues such as the weak foundation of the equipment management system and the disconnection between equipment selection and configuration from reality.Combining the manifestations of related problems,this article proposes strategies such as strengthening the institutional foundation of equipment management,selecting and configuring equipment based on actual conditions,aiming to provide references for large-scale machinery and equipment management to relevant enterprises.展开更多
When carrying out highway traffic engineering projects,it is essential to focus on construction organization design as the core,accurately grasp the key points of construction organization design,and adopt appropriate...When carrying out highway traffic engineering projects,it is essential to focus on construction organization design as the core,accurately grasp the key points of construction organization design,and adopt appropriate construction organization methods to ensure the smooth completion of the project.In the process of implementing project construction management,it is necessary to focus on strengthening the management of construction quality,construction progress,construction costs,and construction safety,and effectively enhance the competitive strength of construction enterprises.This article explores the construction organization of highway traffic engineering projects and proposes specific construction management approaches,hoping to assist in the smooth completion of highway traffic engineering projects with guaranteed quality and quantity.展开更多
As a critically important transportation infrastructure in China,highways play a significant role in supporting socio-economic development.However,due to the rapid growth of the current socio-economic landscape and th...As a critically important transportation infrastructure in China,highways play a significant role in supporting socio-economic development.However,due to the rapid growth of the current socio-economic landscape and the dramatic increase in the number of cars,many early-built highways have experienced a surge in traffic volume,making it difficult to meet the growing traffic demand.This has led to various issues such as traffic congestion and inefficient operation.Therefore,it is necessary to expand and reconstruct the highway interchanges,effectively optimizing traffic organization design and significantly improving the overall service level of the highway.This article provides a detailed analysis of the principles and key points of traffic organization design for the expansion and reconstruction of highway interchanges.Additionally,it delves into the design scheme for the traffic organization of these interchanges.展开更多
Due to the substantial and continuous growth of transportation demand in China,the existing highway capacity has become insufficient to meet the increasing traffic volume.The implementation of highway reconstruction a...Due to the substantial and continuous growth of transportation demand in China,the existing highway capacity has become insufficient to meet the increasing traffic volume.The implementation of highway reconstruction and expansion projects has gradually become a key measure to improve the service level of the road network and alleviate traffic congestion.Meanwhile,route design is a core aspect of highway reconstruction and expansion projects,and its scientific nature and quality can directly affect the safety,economy,and future operational efficiency of the highway.Therefore,this article provides a detailed analysis of the principles and requirements of route design for highway reconstruction and expansion projects.Additionally,it delves into the design process and key technologies applied in route design for these projects.展开更多
The stratum lithology and geological structure of the highway tunnel in the mountainous areas of western China are complex,and the engineering geological conditions are complicated.When the highway tunnel passes throu...The stratum lithology and geological structure of the highway tunnel in the mountainous areas of western China are complex,and the engineering geological conditions are complicated.When the highway tunnel passes through different lithological strata,its structural design and construction technology are completely diff erent.Therefore,in order to support the tunnel design and construction,the tunnel survey Among them,the identification of the contact boundary between magmatic rock and metamorphic rock and the grade of surrounding rock is very important.Through magnetotelluric survey of the Mupi tunnel of Jiuzhaigou-Mianyang highway on G8513 line,2D forward numerical simulation,1D,2D,3D inversion,and engineering geological analysis,it is revealed that the electrical characteristics of each layer,focusing on the identification of the contact boundary between magmatic rock and metamorphic rock.This study provides the electrical characteristics of the magmatic rock and metamorphic rock contact boundary of the Mupi Tunnel.It is speculated that the boundary is revealed by the tunnel construction excavation,which verifies the correctness of the geophysical inversion model and provides a more detailed design basis for the tunnel design.I believe that taking the Mupi Tunnel survey as an example,through this research,it can provide detailed geophysical evidence for highway tunnels to distinguish between magmatic rock and metamorphic rock.展开更多
The paper delved into specific causes of soil erosion during the construction phase of highway projects,analyzed the intrinsic mechanisms behind erosion formation,and examined in detail external dynamic factors contri...The paper delved into specific causes of soil erosion during the construction phase of highway projects,analyzed the intrinsic mechanisms behind erosion formation,and examined in detail external dynamic factors contributing to soil erosion,such as rainfall scouring and wind erosion.Additionally,this paper summarized the unique characteristics of soil and water loss during road construction and the potential severe hazards it may bring,aiming to provide valuable reference for professionals in related fields and to promote further development in the study of natural slope erosion.展开更多
Combining practical engineering projects, this article analyzes the design strategies for the reconstruction and expansion of insufficient clearance sections in highway interchanges. This includes an overview of the p...Combining practical engineering projects, this article analyzes the design strategies for the reconstruction and expansion of insufficient clearance sections in highway interchanges. This includes an overview of the project, a comparison of design options for insufficient clearance in interchanges, and the main design strategies for reconstruction and expansion. It is hoped that this analysis can provide a reference for the design of such road reconstruction and expansion projects.展开更多
To mitigate the sand burial of highways in sandy regions,a separated subgrade design was widely adopted in the embankments of high-grade highways,but the problem of sand deposition on subgrade slopes and pavements sti...To mitigate the sand burial of highways in sandy regions,a separated subgrade design was widely adopted in the embankments of high-grade highways,but the problem of sand deposition on subgrade slopes and pavements still happens frequently.Based on the theory of wind-sand two-phase flow,this paper constructed a three-dimensional model of the separated subgrade,the wind-sand flow transport law around the subgrade with varying median strip widths and concave depths was simulated by Fluent software.After comparison and analysis of seven subgrade models,the flow field distribution,wind speed horizontal variation,and erosion-deposition characteristics were investigated.The findings are as follows:(1)The width of the median strip in the separated subgrade had significant influences on the wind-sand flow.The smooth passage of wind-sand flow over the road surface was facilitated with the increase of the median strip width.However,sand deposition in the median strip happened.It can lead to secondary sand damage of downwind subgrade and increase the work load of road sand removal for subsequent maintenance.(2)The obstruction to airflow and sand accumulation was aggravated with greater concave depth of the median strip.Therefore,it is advisable to minimize the concave depth of the median strip in case of more sand damage.(3)A median strip width exceeding 12 m(possibly without guardrails)for an integral embankment without enough road land is recommended.Conversely,median strip width of over 40 m for separate subgrade with unrestricted land is suggested.(4)In the case of sand deposition in the existing separated subgrade,the median strip can be filled by sand deposition or other materials,then was covered with gravel to form a flat ground like Gobi smooth surface,which can let the wind-blown sand flow pass through the subgrade section without sand deposition.展开更多
基金jointly funded by the Joint Funds of the National Natural Science Foundation of China(Grant No.U2568210)the Interdisciplinary Research Program of Shihezi University(Grant No.JCYJ202317)the National Natural Science Foundation of China(Grant No.12362035)。
文摘Scientific analysis of aeolian sand environments is fundamental for sustainable disaster mitigation along desert highways.However,significant regional variability in wind energy conditions complicates accurate characterization of wind regimes and introduces uncertainty in determining optimal monitoring timescales.Moreover,prevailing sand control measures often rely on standardized designs rather than site-specific adaptive strategies.To address these issues,this study proposes an integrated framework for aeolian environment analysis and develops targeted disaster mitigation strategies tailored for desert highways.The proposed framework employs wavelet transform to unravel the periodic characteristics of wind speed time series and integrates multi-source data(including ERA5 wind datasets,sand samples,ASTER GDEM,and multi-temporal remote sensing imagery)to enable a comprehensive aeolian environmental assessment.Concurrently,a suite of adaptive strategies is formulated to mitigate disaster risks along desert highways.Validated through a case study of the Tumushuk-Kunyu Desert Highway in Xinjiang,China,the framework exhibits high accuracy:predictions of annual aeolian sand transport activity show relative errors mostly below 7%against long-term reference sequences,and the calculated resultant drift direction exhibits a strong correlation with observed dune migration,yielding an R-squared value of 0.96.These findings confirm the framework’s reliability and provide a robust basis for designing adaptive,location-specific mitigation strategies,thereby enhancing the sustainability of desert highway infrastructure.
文摘Highways are a vital component of global transportation infrastructure,but their environmental impact,particularly in terms of carbon emissions,poses significant challenges to achieving global sustainability and climate goals.This literature review discusses the new area of low-carbon highways,including next-generation construction technologies and near-zero carbon operation strategies.It discusses the purpose of innovative materials,such as low-carbon cements,recycled asphalt,and geopolymers,and intelligent infrastructure solutions,including intelligent traffic control and electric vehicle charging systems.The article also explores the significance of Lifecycle Assessment(LCA)and carbon accounting in the measurement and minimization of the carbon footprint of highways.Even though a lot of progress has been made,there are still several technical,economic,and regulatory obstacles,among which are the prohibitive initial cost of low-carbon technologies and the non-standardization of policies.The future outlook indicates that to alleviate these challenges,a coordinated effort among the research,policy,industry,and communities is necessary.Low-carbon highways can help to have a robust,sustainable transport system that meets global climate goals by incorporating sustainable processes in highway design,construction,and operation.
基金financially supported by Youth Science“Research on Failure Mechanism and Evaluation Method of Sand Control Measures for Railway Machinery in Sandy Area”(12302511)Ningxia Transportation Department Science and Technology Project(20200173)The Central Guidance on Local Science and Technology Development Funds(22ZY1QA005)。
文摘Investigating the wind-sand flow response regularity in the longitudinal slope sections of desert highways provides a scientific basis for selecting the slope of desert roads.This study uses the Tengger Desert section of the Wuhai-Maqin Expressway as a case study,employing CFD numerical simulation methods to calculate and analyze the wind-sand flow field distribution characteristics in different longitudinal slope sections.The results show that:(1)Along with the direction of the incoming flow,the windward and leeward slope toes of the embankment are low-wind-speed zones,with the wind speed at the leeward slope toe being even lower.The higher the embankment,the larger the low-wind-speed zone at the windward and leeward slope toes.As the longitudinal slope increases,the extent of the lowwind-speed zone at the same location along the route also increases.(2)Along the route direction,the wind speed at the windward and leeward slope toes decreases as embankment height increases.At the embankment toe,sand particles are transported from the top to the bottom of the longitudinal slope,and the greater the longitudinal slope,the stronger the transport effect.(3)Along the route direction,the sand accumulation around the embankment gradually gathers toward the bottom of the longitudinal slope as the slope increases.When the longitudinal slope is 3%and 4%,the trend of sand accumulation moving from the windward side at the end of the route to the leeward side at the start of the route is more significant.When the longitudinal slope is less than or equal to 3%,severe sand accumulation within the embankment range is reduced by 86.4%or more compared to when the slope is 4%.(4)Under the same longitudinal slope,the higher the embankment height,the smaller its transport rate.When the embankment height is the same,the greater the longitudinal slope,the greater the embankment transport rate.
基金supported by the Gansu Provincial Science and Technology Planning Project(23ZDFA018)the Research Program of Construction Science and Technology Project of the Transportation Department of Inner Mongolia Autonomous Region,China(NJ-2018-29)the Gansu Province Longyuan Youth Talent Program,and the Doctoral Research Start-up Fund of Fuyang Normal University,China(2024KYQD0123).
文摘Sand control engineering plays a pivotal role in ensuring the safe operation of transportation corridors that traverse desertified areas.Evaluating the effectiveness of these interventions provides a crucial scientific basis for mitigating aeolian hazards and guiding the sustainable management of fragile and arid ecosystems.In this study,we investigated a representative section of Highway S315,which is prone to windblown sand hazards,in Ejin Banner,northern China.By integrating segmented measurements with unmanned aerial vehicle(UAV)-based oblique photogrammetry,we quantitatively characterized the spatial and temporal evolution of sand accumulation around multiple sand control structures and assessed their blocking efficiency.Complementary road sand-removal records and meteorological observations were analyzed to evaluate the long-term performance of engineering measures.Our results showed that sand accumulation behind high vertical sand barriers typically exhibited a triangular cross-sectional morphology,with a gently inclined stoss slope and a steep lee slope.The shape and volume of these deposits evolved dynamically in response to variations in the prevailing wind regime,reflecting strong feedback between barrier geometry and local airflow redistribution.In contrast,the low-profile checkerboard sand barriers displayed a three-stage morphological trajectory—initial accumulation,edge intensification,and functional decline—indicating a progressive loss of sand-trapping capacity as burial proceeded.Sand accumulation was markedly greater on the highway's western(upwind)side than on the eastern(downwind)side,with 70.0%–90.0%of the airborne sediment flux intercepted by the upwind structures.From 2015 to 2020,mean annual wind speeds remained stable(2.68±0.04 m/s),while precipitation varied from 22.6 to 103.7 mm.However,the annual sand removal volume from the road decreased consistently,confirming the enhanced mitigation effect of multi-level protective system.These findings highlight the coupled interactions between engineering design,wind–sand dynamics,and topographic context.Beyond their immediate protective role,well-designed sand control systems also contribute to the prevention of regional desertification by stabilizing mobile dunes and fostering conditions favorable for ecological restoration.The insights gained here provide both theoretical and practical support for optimizing sand control engineering and advancing sustainable hazard mitigation in arid and semi-arid areas.
基金The Natural Science Foundation of Heilongjiang Province(No.LH2023E011)Open Fund of National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment in Changsha University of Science and Technology(No.kfj230105).
文摘To uncover the decision-making mechanisms and evolutionary dynamics of multiple stakeholders in highway noise pollution control,a three-party evolutionary game model involving the government,operators,and the public is constructed.The operation period is divided into different stages for differentiated analysis.A simulation analysis was performed on the Lituo sinking section of the Beijing-Hong Kong-Macao Highway to assess the impact of variations in critical elements on the system.The results indicate that the Lituo sinking section of the Beijing-Hong Kong-Macao Highway is currently in its early stage of development,with the corresponding strategies being active regulation,excessive emissions,and supervision.When the cost of the government’s active regulation decreases from 1×10^(5) to 5×10^(4) yuan,the system converges more rapidly toward the active regulation strategy.When the cost of the operator’s excessive emissions increases from 14.08×10^(6) to 20.00×10^(6) yuan,the system drives the operator toward the standardized emission strategy.In addition,when the cost of public supervision decreases from 15×10^(4) to 5×10^(4) yuan and the compensation paid by operators to the public increases from 1.288×10^(6) to 2.576×10^(6) yuan,the system converges more quickly toward the supervision strategy.The cost of the operator’s excessive emissions serves as the core decision variable for achieving the ideal equilibrium in the three-party game involving government active regulation,operator standardized emissions,and public supervision.
基金National Natural Science Foundation of China(Nos.42301473,42271424,42171397)Chinese Postdoctoral Innovation Talents Support Program(No.BX20230299)+2 种基金China Postdoctoral Science Foundation(No.2023M742884)Natural Science Foundation of Sichuan Province(Nos.24NSFSC2264,2025ZNSFSC0322)Key Research and Development Project of Sichuan Province(No.24ZDYF0633).
文摘As a key node of modern transportation network,the informationization management of road tunnels is crucial to ensure the operation safety and traffic efficiency.However,the existing tunnel vehicle modeling methods generally have problems such as insufficient 3D scene description capability and low dynamic update efficiency,which are difficult to meet the demand of real-time accurate management.For this reason,this paper proposes a vehicle twin modeling method for road tunnels.This approach starts from the actual management needs,and supports multi-level dynamic modeling from vehicle type,size to color by constructing a vehicle model library that can be flexibly invoked;at the same time,semantic constraint rules with geometric layout,behavioral attributes,and spatial relationships are designed to ensure that the virtual model matches with the real model with a high degree of similarity;ultimately,the prototype system is constructed and the case region is selected for the case study,and the dynamic vehicle status in the tunnel is realized by integrating real-time monitoring data with semantic constraints for precise virtual-real mapping.Finally,the prototype system is constructed and case experiments are conducted in selected case areas,which are combined with real-time monitoring data to realize dynamic updating and three-dimensional visualization of vehicle states in tunnels.The experiments show that the proposed method can run smoothly with an average rendering efficiency of 17.70 ms while guaranteeing the modeling accuracy(composite similarity of 0.867),which significantly improves the real-time and intuitive tunnel management.The research results provide reliable technical support for intelligent operation and emergency response of road tunnels,and offer new ideas for digital twin modeling of complex scenes.
基金funded by Sichuan Science and Technology Program(Nos.2023NSFSC1414 and 2023NSFSC0263)Sichuan Transportation Science and Technology Program(No.2018-B-05)Sichuan Communication Surveying&Design Institute CO.,LTD(No.232023002).
文摘On September 5,2022,an M_(S)6.8 earthquake struck Luding County,Kardze Prefecture,Sichuan Province—an area that is particularly vulnerable to geological changes.The earthquake caused considerable damage along the highway,leading to road disruptions and blockages,further isolating earthquake-stricken areas.Accordingly,a rapid survey of the main highways in this area was conducted,and 507 damage points were identified.Roadbed damage accounted for more than 70%of the total damages.Co-seismic disasters were primarily distributed along the highways on both sides of the Dadu River in the reservoir area of the Dagangshan Hydropower Station,Caoke Township,and Detuo Township.Further,six factors under three categories of the spatial distribution of highway damage in the earthquake-stricken areas were analyzed.The rate of highway damage was positively correlated with the seismic intensity but negatively correlated with the fault and river distances.The earthquake intensity had the most significant impact:37.5%of road disruptions were found in areas with an intensity of IX;this percentage was 1.6 and 5.8 times greater than those found in areas with intensities of VIII and VII,respectively.The roads with the most significant damage were in regions with intensities above VIII,faults within 5 km,slopes within 30°–70°,rivers within 100 m,and the presence of granite.This indicated that these factors aggravated highway disruption,resulting in more than 90% of damaged highways in strongly shaken regions.Our findings may provide guidance for efficient highway recovery following earthquakes.
文摘The Senegalese Sovereign Fund for Strategic Investment(FONSIS)has recently signed a partnership agreement with the Chinese company Sinohydro to construct the country’s first“water highway.”This project is part of the new Senegalese government’s water transfer initiative,the Grand Transfert d’Eau(GTE)project,which aims to ensure a sustainable supply of drinking water and support the agricultural sector.
基金National Undergraduate Training Program for Innovation and Entrepreneurship(Project No.:202310407006)。
文摘Highway planning requires geological surveys and stability analysis of the surrounding area.In the early stage of the survey,the modeling and stability analysis of the survey area can be carried out by using GIS software to intuitively understand the topography of the study area.The use of DEM to extract terrain factors can be used for simple stability analysis and the source data is easy to obtain,simple to operate,fast to analyze,and reliable analysis results.In this paper,taking the X104 road section in Ganxian County as an example,the ArcGIS platform is used to carry out 3D modeling visualization and stability analysis,and the stability evaluation map of the study area is obtained.
基金supported by the Transportation Consortium of South-Central States (No.18HSTSA01)support was provided by the University of San Antonio, Department of Integrated Biology from the principal investigator’s startup funds to support student research assistants.
文摘Roadside habitat through major urban areas may offer remnant examples of natural grasslands.These habitats may be subjected to frequent as mowing and exposure to automobile emissions and runoff.This study was conducted on interstate highway right-of-ways in San Antonio,Texas,U.S.A.We compared the vegetation species and diversity,and the organic carbon of leaf litter,plants,and soils.Two non-native grasses accounted for 50.9% cover,while all native forbs and grasses accounted for only 9.8% cover.The mean biomass of nonnative grasseswas 4.5 times greater than that of all native species.Organic carbon content of leaf litter,plants,and soils was variable among the study sites,possibly due to management practices and a drought that occurred during the study.Themean organic carbon content in the upper 20 cm soil was 5.0 kg C/m^(2) and organic carbon content was greater in the upper 10 cm than organic carbon in the 10.1 to 20 cm portion.Cynodon dactylon and Bouteloua curtipendula exhibited the greatest photosynthesis efficiency indicating these grasses are more adaptable to hot summer temperatures found in Central Texas.The organic carbon content along a major interstate was 13,793 kg·C/ha for leaf litter,vegetation,and the upper 20 cm of the soil.We conclude that interstate highways provide habitat for some native species,but the vegetation along right-of-ways is dominated by two non-native grasses.It appears unlikely that roadside habitat can be restored to resemble native grasslands without large scale and costly restoration efforts.
文摘Aiming at the problems of difficulty in balancing construction efficiency and quality,as well as the high safety risks of working at heights during the construction of main piers for highway bridges,this study takes a specific bridge project as an example to introduce the technology of hydraulically sliding formwork for the construction of main piers of highway bridges.An in-depth analysis of the project’s construction process found that this technology can effectively improve construction efficiency,ensure the quality of concrete pouring,and significantly reduce the potential safety hazards of working at heights.It provides a reliable technical solution for constructing the main piers of highway bridges and has important reference significance for similar projects.
文摘This article focuses on traffic safety management during the reconstruction and expansion of highways,with the research objective of understanding traffic safety management issues and exploring more effective traffic safety management measures.The research employs practical observation and logical analysis as research methods.Firstly,it elaborates on the connotation of traffic safety management during the reconstruction and expansion of highways,analyzes its key points,and affirms its management value from different perspectives.It provides a detailed analysis of issues such as the weak foundation of traffic safety management systems and the inadequacy of comprehensive traffic safety management,and interprets the restrictive impact of related issues.Based on the manifestation of relevant issues,strategies such as strengthening the institutional foundation of traffic safety management and constructing a comprehensive traffic safety management system are proposed,aiming to provide traffic safety management references for relevant enterprises.
文摘This article focuses on the management of large-scale machinery and equipment in highway construction,with the research objective of identifying issues at the management level and exploring more effective management measures.Through practical observation and logical analysis,this article elaborates on the management connotations of large-scale machinery and equipment in highway construction,affirming its management value from different perspectives.On this basis,it carefully analyzes the problems existing in the management of large-scale machinery and equipment,providing a detailed interpretation of issues such as the weak foundation of the equipment management system and the disconnection between equipment selection and configuration from reality.Combining the manifestations of related problems,this article proposes strategies such as strengthening the institutional foundation of equipment management,selecting and configuring equipment based on actual conditions,aiming to provide references for large-scale machinery and equipment management to relevant enterprises.
文摘When carrying out highway traffic engineering projects,it is essential to focus on construction organization design as the core,accurately grasp the key points of construction organization design,and adopt appropriate construction organization methods to ensure the smooth completion of the project.In the process of implementing project construction management,it is necessary to focus on strengthening the management of construction quality,construction progress,construction costs,and construction safety,and effectively enhance the competitive strength of construction enterprises.This article explores the construction organization of highway traffic engineering projects and proposes specific construction management approaches,hoping to assist in the smooth completion of highway traffic engineering projects with guaranteed quality and quantity.
文摘As a critically important transportation infrastructure in China,highways play a significant role in supporting socio-economic development.However,due to the rapid growth of the current socio-economic landscape and the dramatic increase in the number of cars,many early-built highways have experienced a surge in traffic volume,making it difficult to meet the growing traffic demand.This has led to various issues such as traffic congestion and inefficient operation.Therefore,it is necessary to expand and reconstruct the highway interchanges,effectively optimizing traffic organization design and significantly improving the overall service level of the highway.This article provides a detailed analysis of the principles and key points of traffic organization design for the expansion and reconstruction of highway interchanges.Additionally,it delves into the design scheme for the traffic organization of these interchanges.
文摘Due to the substantial and continuous growth of transportation demand in China,the existing highway capacity has become insufficient to meet the increasing traffic volume.The implementation of highway reconstruction and expansion projects has gradually become a key measure to improve the service level of the road network and alleviate traffic congestion.Meanwhile,route design is a core aspect of highway reconstruction and expansion projects,and its scientific nature and quality can directly affect the safety,economy,and future operational efficiency of the highway.Therefore,this article provides a detailed analysis of the principles and requirements of route design for highway reconstruction and expansion projects.Additionally,it delves into the design process and key technologies applied in route design for these projects.
基金National Natural Science Foundation of China(41630640)National Science Foundation of Innovation Research Group(41521002)+1 种基金National Natural Science Foundation of China(41790445)Construction S&T Project of Department of Transportation of Sichuan Province(Grant No.2020A01).
文摘The stratum lithology and geological structure of the highway tunnel in the mountainous areas of western China are complex,and the engineering geological conditions are complicated.When the highway tunnel passes through different lithological strata,its structural design and construction technology are completely diff erent.Therefore,in order to support the tunnel design and construction,the tunnel survey Among them,the identification of the contact boundary between magmatic rock and metamorphic rock and the grade of surrounding rock is very important.Through magnetotelluric survey of the Mupi tunnel of Jiuzhaigou-Mianyang highway on G8513 line,2D forward numerical simulation,1D,2D,3D inversion,and engineering geological analysis,it is revealed that the electrical characteristics of each layer,focusing on the identification of the contact boundary between magmatic rock and metamorphic rock.This study provides the electrical characteristics of the magmatic rock and metamorphic rock contact boundary of the Mupi Tunnel.It is speculated that the boundary is revealed by the tunnel construction excavation,which verifies the correctness of the geophysical inversion model and provides a more detailed design basis for the tunnel design.I believe that taking the Mupi Tunnel survey as an example,through this research,it can provide detailed geophysical evidence for highway tunnels to distinguish between magmatic rock and metamorphic rock.
基金Supported by Fundamental Research Fund for the Central Universities(2452021088,2452021081)Science and Technology Project of State Grid Shandong Electric Power Company(5200-202416091A-1-1-ZN)Sanmenxia Science and Technology Major Projec(2023L01002).
文摘The paper delved into specific causes of soil erosion during the construction phase of highway projects,analyzed the intrinsic mechanisms behind erosion formation,and examined in detail external dynamic factors contributing to soil erosion,such as rainfall scouring and wind erosion.Additionally,this paper summarized the unique characteristics of soil and water loss during road construction and the potential severe hazards it may bring,aiming to provide valuable reference for professionals in related fields and to promote further development in the study of natural slope erosion.
文摘Combining practical engineering projects, this article analyzes the design strategies for the reconstruction and expansion of insufficient clearance sections in highway interchanges. This includes an overview of the project, a comparison of design options for insufficient clearance in interchanges, and the main design strategies for reconstruction and expansion. It is hoped that this analysis can provide a reference for the design of such road reconstruction and expansion projects.
基金supported by the Third Xinjiang Scientific Expedition and Research Program-Investigation and Risk Assessment of Drought and Aeolian Disasters in Tarim River Basin(No.2021xjkk0300)the National Natural Science Foundation of China(No.62466056)the subject of'the technical scheme and application demonstration of sand disaster prevention and control of Xinjiang expressway to engineering practice,Xinjiang Transportation Investment(Group)Co.,Ltd.(No.XJJTZKX-FWCG-202401-0043).
文摘To mitigate the sand burial of highways in sandy regions,a separated subgrade design was widely adopted in the embankments of high-grade highways,but the problem of sand deposition on subgrade slopes and pavements still happens frequently.Based on the theory of wind-sand two-phase flow,this paper constructed a three-dimensional model of the separated subgrade,the wind-sand flow transport law around the subgrade with varying median strip widths and concave depths was simulated by Fluent software.After comparison and analysis of seven subgrade models,the flow field distribution,wind speed horizontal variation,and erosion-deposition characteristics were investigated.The findings are as follows:(1)The width of the median strip in the separated subgrade had significant influences on the wind-sand flow.The smooth passage of wind-sand flow over the road surface was facilitated with the increase of the median strip width.However,sand deposition in the median strip happened.It can lead to secondary sand damage of downwind subgrade and increase the work load of road sand removal for subsequent maintenance.(2)The obstruction to airflow and sand accumulation was aggravated with greater concave depth of the median strip.Therefore,it is advisable to minimize the concave depth of the median strip in case of more sand damage.(3)A median strip width exceeding 12 m(possibly without guardrails)for an integral embankment without enough road land is recommended.Conversely,median strip width of over 40 m for separate subgrade with unrestricted land is suggested.(4)In the case of sand deposition in the existing separated subgrade,the median strip can be filled by sand deposition or other materials,then was covered with gravel to form a flat ground like Gobi smooth surface,which can let the wind-blown sand flow pass through the subgrade section without sand deposition.
