With the continuous development of science technology,Building Information Modeling(BIM)technology has slowly garnered wider attention from designers and architecture professionals.BIM,the 3D model-based process that ...With the continuous development of science technology,Building Information Modeling(BIM)technology has slowly garnered wider attention from designers and architecture professionals.BIM,the 3D model-based process that allows for efficient planning,designing,constructing and managing buildings and infrastructure,could potentially revolutionize the building architectural discipline.This paper analyses the significance of the application of BIM technology in architectural lighting design,as well as the application points and the trends.展开更多
In the process of Chinas economic development, peoples living standards are constantly improving, and peoples work and lifestyle have changed greatly. The traditional architectural design of commercial complex cant me...In the process of Chinas economic development, peoples living standards are constantly improving, and peoples work and lifestyle have changed greatly. The traditional architectural design of commercial complex cant meet peoples daily needs, and it is necessary to gradually change the architectural design, so as to better meet peoples living and entertainment needs. Through diversified construction, commercial complexes can better meet the production and living needs of urban residents. Based on this, this paper makes an in-depth analysis of the development trend of commercial complex architectural design.展开更多
With the rapid development of social economy, people have realized the damage of industry to the natural environment, and the serious consequences of this kind of rough development are immeasurable, so the business ph...With the rapid development of social economy, people have realized the damage of industry to the natural environment, and the serious consequences of this kind of rough development are immeasurable, so the business philosophy of all walks of life needs to be reformed and improved. The construction industry is the basis of people's life. In response to the call of the state to protect nature, many enterprises began to adopt the design concept of green building, to meet people's daily needs to the greatest extent, while reducing the damage to nature as far as possible, so as to protect people's living environment.展开更多
Chinese International Garden and Flower Expo(hereinafter referred to as Garden Expo) is an exhibition of garden arts and works of the largest scale,highest grade and richest contents in China,landscape design of its s...Chinese International Garden and Flower Expo(hereinafter referred to as Garden Expo) is an exhibition of garden arts and works of the largest scale,highest grade and richest contents in China,landscape design of its sites(garden expo parks) must be innovative. This paper analyzed original innovation,integrated innovation,and re-innovation based on introduction and digestion in the landscape design of Chongqing Garden Expo Park,and introduced the favorable landscape effect made by these innovations.展开更多
With the improvement of living standards, peasants have attached increasing attention to quality of living environment, indoor thermal comfort of rural residence has become a functional need of new countryside residen...With the improvement of living standards, peasants have attached increasing attention to quality of living environment, indoor thermal comfort of rural residence has become a functional need of new countryside residence. Chengdu is a foggy area with shorter sunshine hours, humid air, more foggy but fewer windy days, so local residence is likely to be muggy, which influences comfort of residents seriously. According to relevant researches, most rural residences in Chengdu use only natural ventilation, and the indoor thermal comfort is poor. In view of this, this paper tried to improve indoor thermal comfort and quality of living environment from the perspective of residence functional design.展开更多
With the development of urban construction and improvement of living standard, modern people have had higher requirements on culture. National Maritime Museum collects and displays maritime culture and civilization of...With the development of urban construction and improvement of living standard, modern people have had higher requirements on culture. National Maritime Museum collects and displays maritime culture and civilization of China, it is a signifi cant cultural facility in New Binhai District of Tianjin. The museum shows us the splendid picture of yel ow terrestrial civilization and blue maritime civilization over the past 2,000 years in China. Landscape design outside the exhibition hall of the museum has the integration of culture and museum as the starting point, and makes brand-new explorations in landscape humanistic care and landscape designs of green buildings.展开更多
Solar collectors can provide clean, renewable, and domestic energy. The tilt angle and horizontal direction of solar collectors significantly affect its efficiency. There are many good methods to search the optimum ti...Solar collectors can provide clean, renewable, and domestic energy. The tilt angle and horizontal direction of solar collectors significantly affect its efficiency. There are many good methods to search the optimum tilt angle and horizontal direction to realize the maximum total radiation on the solar collector within a particular day or a specific period. However, it is hard to realize it when solar collectors are placed under obstacle’s shadows;especially when some obstacles, such as trees, have irregular shapes. This paper presents algorithms to achieve the best tilt angle and horizontal direction for solar collector’s performance under the free-form surfaces 3D obstacle’s shadow. The solution process is composed of 4 steps. First, it creates a 3D scene, in which a unique color is given to the solar collector. Second, it employs orthographic projection from the point of view to get an image of the scene. Third, the number of pixels is used to represent the efficiency of the solar collector by counting the pixels of the unique color. Fourth, the efficiency of solar collector in each direction in a period of time is calculated with many images to further select the best direction.展开更多
Due to the increasing shortage of medical resources in recent years, in order to avoid such problems, our hospital has designed the reconstruction of a temporary hospital in a large local exhibition center according t...Due to the increasing shortage of medical resources in recent years, in order to avoid such problems, our hospital has designed the reconstruction of a temporary hospital in a large local exhibition center according to the requirements of relevant management departments. The renovation design and construction of the temporary hospital is very short, so major changes to the original building should be avoided. This paper takes the reconstruction of temporary hospitals as an example, and summarizes and analyzes the design points, key points and difficulties of power supply, distribution, lighting and fire fighting for the reference of designers of similar projects.展开更多
In the construction project, design and construction is a very important link, the main reason is that design affects construction, construction affects the quality of construction. However, the content of structural ...In the construction project, design and construction is a very important link, the main reason is that design affects construction, construction affects the quality of construction. However, the content of structural design and construction management in construction engineering is relatively complex, which should be considered comprehensively and implemented actively. Only by reasonably controlling the structural design and construction site, can the construction be carried out smoothly.展开更多
Under the background of the rapid increase of China's scientific and technological strength, various industries have paid more attention to the interconnection technology of everything, because the derived big dat...Under the background of the rapid increase of China's scientific and technological strength, various industries have paid more attention to the interconnection technology of everything, because the derived big data platform is also the key to support the stable development of China's green building industry. In order to do a good job of green dynamic design, the article will elaborate the relevant methods and strategies, hoping to provide relevant reference for relevant people.展开更多
With the acceleration of China's urbanization process, rational planning of urban roads and bridges is especially important for normal production and life. Especially in the rainy season in July and August, the fl...With the acceleration of China's urbanization process, rational planning of urban roads and bridges is especially important for normal production and life. Especially in the rainy season in July and August, the flooding problem in the city has been highlighted, which has brought potential safety hazards, not only threatening the safety of residents' lives, but also damaging the ranks of roads and bridges and reducing the service life of roads and bridges. In order to adapt to the construction concept of "Sponge City" and improve the design and construction level of local roads and bridges, relevant design knowledge must be used in the design and research of urban roads and bridges. The roads and bridges in the city have a lot of urban space. By doing a good job in the construction and design of roads and bridges, urban environmental problems can be effectively improved. In order to carry out the construction and design of roads and bridges, the concept of sponge city can be used to improve the urban environment and meet the need of optimal allocation of water resources. Therefore, in order to meet the needs of urban ecosystem construction, the systematic design of roads and bridges should be strengthened.展开更多
When it comes to the 21st century, people's living standards continue to improve, the quality of their lives also put forward more requirements and hopes, the public hope that their living conditions not only have...When it comes to the 21st century, people's living standards continue to improve, the quality of their lives also put forward more requirements and hopes, the public hope that their living conditions not only have comfort, but also have a certain degree of security. High rise building water supply and drainage and fire protection design should not only meet the normal use of water supply and drainage system, but also meet the fire protection and fire extinguishing functions. Compared with the ordinary single-layer building, the number of floors in high-rise buildings is large, and people's travel almost all depends on the elevator, while the evacuation only depends on the evacuation stairs, which often causes evacuation difficulties, not timely and other safety problems. If the fire protection design is defective or unreasonable, and a fire occurs in a high-rise building, it will threaten and affect the safety of people's lives and property. Therefore, it is necessary to study and analyze the problems existing in the formulation of water supply and drainage and fire protection design scheme of high-rise buildings and the layout of fire protection facilities in high-rise buildings.展开更多
In order to further enhance the aesthetics,artistry and culture of interior design,this paper mainly studies and analyzes the application strategies of traditional Chinese cultural elements in interior design,in order...In order to further enhance the aesthetics,artistry and culture of interior design,this paper mainly studies and analyzes the application strategies of traditional Chinese cultural elements in interior design,in order to provide reference for future developments.展开更多
In recent years, with the improvement and optimization of productivity level, the scale and quantity of industrial park construction in China have an obvious growth trend, which provides a broad space for the developm...In recent years, with the improvement and optimization of productivity level, the scale and quantity of industrial park construction in China have an obvious growth trend, which provides a broad space for the development of Chinas construction industry. In the process of analyzing and studying a large number of industrial park data, in order to reasonably carry out environmental protection work, architects must actively participate in the project design process, fully penetrate and integrate the concept of green building design, and then effectively realize the overall optimization of the ecological performance of construction projects, so as to promote the improvement of their comprehensive level. This paper analyzes and summarizes the application of green building design in industrial park construction in China and puts forward corresponding optimization suggestions to further implement the comprehensive quality of industrial park buildings.展开更多
Beautiful urban landscape and good urban environment are prerequisites for attracting investment and developing tourism. Urban landscape is closely related to the life of every resident in the city, permeating all wal...Beautiful urban landscape and good urban environment are prerequisites for attracting investment and developing tourism. Urban landscape is closely related to the life of every resident in the city, permeating all walks of life and benefiting the whole society. Reasonable landscape design helps to enhance the vitality of urban economic and social systems. Throughout the development of human civilization, Chinese traditional culture has greatly promoted the spread and development of civilization. Some cultural elements in Chinese traditional culture, such as calligraphy, shadow play and paper cutting, are all concrete expressions of the connotation of Chinese traditional culture. The rational use of some traditional cultural elements in modern landscape design can reflect the national characteristics and promote the common development of the two. Next, the article discusses the application of traditional elements in modern landscape design.展开更多
The constitutive model is essential for predicting the deformation and stability of rocksoil mass.The estimation of constitutive model parameters is a necessary and important task for the reliable characterization of ...The constitutive model is essential for predicting the deformation and stability of rocksoil mass.The estimation of constitutive model parameters is a necessary and important task for the reliable characterization of mechanical behaviors.However,constitutive model parameters cannot be evaluated accurately with a limited amount of test data,resulting in uncertainty in the prediction of stress-strain curves.This paper proposes a Bayesian analysis framework to address this issue.It combines the Bayesian updating with the structural reliability and adaptive conditional sampling methods to assess the equation parameter of constitutive models.Based on the triaxial and ring shear tests on shear zone soils from the Huangtupo landslide,a statistical damage constitutive model and a critical state hypoplastic constitutive model were used to demonstrate the effectiveness of the proposed framework.Moreover,the parameter uncertainty effects of the damage constitutive model on landslide stability were investigated.Results show that reasonable assessments of the constitutive model parameter can be well realized.The variability of stress-strain curves is strongly related to the model prediction performance.The estimation uncertainty of constitutive model parameters should not be ignored for the landslide stability calculation.Our study provides a reference for uncertainty analysis and parameter assessment of the constitutive model.展开更多
Construction of tunnels in urban areas requires assessment of the impact of tunneling on the stability and integrity of existing pile foundations. We have focused our attention to the analysis of the carrying capacity...Construction of tunnels in urban areas requires assessment of the impact of tunneling on the stability and integrity of existing pile foundations. We have focused our attention to the analysis of the carrying capacity of pile foundations provided by the impact of construction of urban tunnels on adjacent pile foundations, under the engineering background of the construction of the # 2 Line of the Guangzhou subway. It is carried out using a fast Lagrangian analysis of a continuum in a 3D numerical code, which is an elastoplastic three-dimensional finite difference model, to simulate the response of piles under the entire process of metro tunneling （deactivation of soil element and activation of the lining）. The adjacent stratum around the tunnel is classified into three regions： Zone Ⅰ （upper adjacent stratum of tunnel）, Zone Ⅱ （45°-upper-lateral adjacent stratum of tunnel） and Zone Ⅲ （lateral adjacent stratum of tunnel）. In each region one typical pile is chosen to be calculated and analyzed in detail. Numerical simulations are mainly conducted at three points of each pile shaft： the side-friction force of the pile, the tip resistance of the pile and the axial loading of the pile. A contrasting analysis has been conducted both in the response of typical piles in different regions and from computer calculated values with site monitoring values. The results of numerical simulations show that the impact on carrying capacity of the piles lies mainly in the impact of construction of urban tunnels on the side-friction forces and the tip resistance of piles. The impact differs considerably among the different strata zones where the pile tips are located. The complicated rules of side-friction force and tip resistance of piles has resulted in complicated rules of pile axial loading thus, in the end, it impacts the carrying capacity of pile-foundations. It is necessary to take positive measures, such as stratum grouting stabilization or foundation underpinning, etc, to deal with the carrying capacity and the settlement of pile-foundations. The results are of value to similar engineering projects.展开更多
To accelerate the achievement of China’s carbon neutrality goal and to study the factors affecting the geologic CO_(2)storage in the Ordos Basin,China’s National Key R&D Programs propose to select the Chang 6 oi...To accelerate the achievement of China’s carbon neutrality goal and to study the factors affecting the geologic CO_(2)storage in the Ordos Basin,China’s National Key R&D Programs propose to select the Chang 6 oil reservoir of the Yanchang Formation in the Ordos Basin as the target reservoir to conduct the geologic carbon capture and storage(CCS)of 100000 t per year.By applying the basic theories of disciplines such as seepage mechanics,multiphase fluid mechanics,and computational fluid mechanics and quantifying the amounts of CO_(2)captured in gas and dissolved forms,this study investigated the effects of seven factors that influence the CO_(2)storage capacity of reservoirs,namely reservoir porosity,horizontal permeability,temperature,formation stress,the ratio of vertical to horizontal permeability,capillary pressure,and residual gas saturation.The results show that the sensitivity of the factors affecting the gas capture capacity of CO_(2)decreases in the order of formation stress,temperature,residual gas saturation,horizontal permeability,and porosity.Meanwhile,the sensitivity of the factors affecting the dissolution capture capacity of CO_(2)decreases in the order of formation stress,residual gas saturation,temperature,horizontal permeability,and porosity.The sensitivity of the influencing factors can serve as the basis for carrying out a reasonable assessment of sites for future CO_(2)storage areas and for optimizing the design of existing CO_(2)storage areas.The sensitivity analysis of the influencing factors will provide basic data and technical support for implementing geologic CO_(2)storage and will assist in improving geologic CO_(2)storage technologies to achieve China’s carbon neutralization goal.展开更多
The thermal energy storage phase change material used for building has been prepared with a few of fatty acids based on the principle of binary low eutectic point. The thermal behaviors such as phase transition temper...The thermal energy storage phase change material used for building has been prepared with a few of fatty acids based on the principle of binary low eutectic point. The thermal behaviors such as phase transition temperature and enthalpy of compound energy storage material are researched through differential scanning calorimeter(DSC) and scanning electron microscope(SEM) . The results show that the thermal energy storage phase change composite material can be used in the wall panels well as its higher latent heat.展开更多
To reveal the bearing capacity of the X-section concrete piles pile raft foundation in silica sand,a series of vertical load tests are carried out.The X-section concrete piles are compared with circular section pile w...To reveal the bearing capacity of the X-section concrete piles pile raft foundation in silica sand,a series of vertical load tests are carried out.The X-section concrete piles are compared with circular section pile with the same section area.The load−settlement curves,axial force and skin friction,strain on concave and convex edge of the pile,pile-sand stress ratio,distributions of side and tip resistance are presented.The results show that bearing capacity of the X section concrete pile raft foundation is much larger than that of the circular pile raft foundation.Besides,compared with the circular pile,the peak axial force of X-section piles under raft is deeper and smaller while the neutral point of X-section concrete pile is deeper.Moreover,the strain on the concave edge is much larger than that on the convex edge of the pile,and the convex edge has more potential in bearing capacity as the vertical load increases.The X-section pile has higher pile-sand stress ratios and load-sharing between side resistance and tip resistance.Above all,the X-section concrete pile can significantly increase the bearing capacity of pile-raft foundations in silica sand.展开更多
文摘With the continuous development of science technology,Building Information Modeling(BIM)technology has slowly garnered wider attention from designers and architecture professionals.BIM,the 3D model-based process that allows for efficient planning,designing,constructing and managing buildings and infrastructure,could potentially revolutionize the building architectural discipline.This paper analyses the significance of the application of BIM technology in architectural lighting design,as well as the application points and the trends.
文摘In the process of Chinas economic development, peoples living standards are constantly improving, and peoples work and lifestyle have changed greatly. The traditional architectural design of commercial complex cant meet peoples daily needs, and it is necessary to gradually change the architectural design, so as to better meet peoples living and entertainment needs. Through diversified construction, commercial complexes can better meet the production and living needs of urban residents. Based on this, this paper makes an in-depth analysis of the development trend of commercial complex architectural design.
文摘With the rapid development of social economy, people have realized the damage of industry to the natural environment, and the serious consequences of this kind of rough development are immeasurable, so the business philosophy of all walks of life needs to be reformed and improved. The construction industry is the basis of people's life. In response to the call of the state to protect nature, many enterprises began to adopt the design concept of green building, to meet people's daily needs to the greatest extent, while reducing the damage to nature as far as possible, so as to protect people's living environment.
文摘Chinese International Garden and Flower Expo(hereinafter referred to as Garden Expo) is an exhibition of garden arts and works of the largest scale,highest grade and richest contents in China,landscape design of its sites(garden expo parks) must be innovative. This paper analyzed original innovation,integrated innovation,and re-innovation based on introduction and digestion in the landscape design of Chongqing Garden Expo Park,and introduced the favorable landscape effect made by these innovations.
基金Sponsored by National Natural Science Foundation of China(51278421)
文摘With the improvement of living standards, peasants have attached increasing attention to quality of living environment, indoor thermal comfort of rural residence has become a functional need of new countryside residence. Chengdu is a foggy area with shorter sunshine hours, humid air, more foggy but fewer windy days, so local residence is likely to be muggy, which influences comfort of residents seriously. According to relevant researches, most rural residences in Chengdu use only natural ventilation, and the indoor thermal comfort is poor. In view of this, this paper tried to improve indoor thermal comfort and quality of living environment from the perspective of residence functional design.
文摘With the development of urban construction and improvement of living standard, modern people have had higher requirements on culture. National Maritime Museum collects and displays maritime culture and civilization of China, it is a signifi cant cultural facility in New Binhai District of Tianjin. The museum shows us the splendid picture of yel ow terrestrial civilization and blue maritime civilization over the past 2,000 years in China. Landscape design outside the exhibition hall of the museum has the integration of culture and museum as the starting point, and makes brand-new explorations in landscape humanistic care and landscape designs of green buildings.
文摘Solar collectors can provide clean, renewable, and domestic energy. The tilt angle and horizontal direction of solar collectors significantly affect its efficiency. There are many good methods to search the optimum tilt angle and horizontal direction to realize the maximum total radiation on the solar collector within a particular day or a specific period. However, it is hard to realize it when solar collectors are placed under obstacle’s shadows;especially when some obstacles, such as trees, have irregular shapes. This paper presents algorithms to achieve the best tilt angle and horizontal direction for solar collector’s performance under the free-form surfaces 3D obstacle’s shadow. The solution process is composed of 4 steps. First, it creates a 3D scene, in which a unique color is given to the solar collector. Second, it employs orthographic projection from the point of view to get an image of the scene. Third, the number of pixels is used to represent the efficiency of the solar collector by counting the pixels of the unique color. Fourth, the efficiency of solar collector in each direction in a period of time is calculated with many images to further select the best direction.
文摘Due to the increasing shortage of medical resources in recent years, in order to avoid such problems, our hospital has designed the reconstruction of a temporary hospital in a large local exhibition center according to the requirements of relevant management departments. The renovation design and construction of the temporary hospital is very short, so major changes to the original building should be avoided. This paper takes the reconstruction of temporary hospitals as an example, and summarizes and analyzes the design points, key points and difficulties of power supply, distribution, lighting and fire fighting for the reference of designers of similar projects.
文摘In the construction project, design and construction is a very important link, the main reason is that design affects construction, construction affects the quality of construction. However, the content of structural design and construction management in construction engineering is relatively complex, which should be considered comprehensively and implemented actively. Only by reasonably controlling the structural design and construction site, can the construction be carried out smoothly.
文摘Under the background of the rapid increase of China's scientific and technological strength, various industries have paid more attention to the interconnection technology of everything, because the derived big data platform is also the key to support the stable development of China's green building industry. In order to do a good job of green dynamic design, the article will elaborate the relevant methods and strategies, hoping to provide relevant reference for relevant people.
文摘With the acceleration of China's urbanization process, rational planning of urban roads and bridges is especially important for normal production and life. Especially in the rainy season in July and August, the flooding problem in the city has been highlighted, which has brought potential safety hazards, not only threatening the safety of residents' lives, but also damaging the ranks of roads and bridges and reducing the service life of roads and bridges. In order to adapt to the construction concept of "Sponge City" and improve the design and construction level of local roads and bridges, relevant design knowledge must be used in the design and research of urban roads and bridges. The roads and bridges in the city have a lot of urban space. By doing a good job in the construction and design of roads and bridges, urban environmental problems can be effectively improved. In order to carry out the construction and design of roads and bridges, the concept of sponge city can be used to improve the urban environment and meet the need of optimal allocation of water resources. Therefore, in order to meet the needs of urban ecosystem construction, the systematic design of roads and bridges should be strengthened.
文摘When it comes to the 21st century, people's living standards continue to improve, the quality of their lives also put forward more requirements and hopes, the public hope that their living conditions not only have comfort, but also have a certain degree of security. High rise building water supply and drainage and fire protection design should not only meet the normal use of water supply and drainage system, but also meet the fire protection and fire extinguishing functions. Compared with the ordinary single-layer building, the number of floors in high-rise buildings is large, and people's travel almost all depends on the elevator, while the evacuation only depends on the evacuation stairs, which often causes evacuation difficulties, not timely and other safety problems. If the fire protection design is defective or unreasonable, and a fire occurs in a high-rise building, it will threaten and affect the safety of people's lives and property. Therefore, it is necessary to study and analyze the problems existing in the formulation of water supply and drainage and fire protection design scheme of high-rise buildings and the layout of fire protection facilities in high-rise buildings.
文摘In order to further enhance the aesthetics,artistry and culture of interior design,this paper mainly studies and analyzes the application strategies of traditional Chinese cultural elements in interior design,in order to provide reference for future developments.
文摘In recent years, with the improvement and optimization of productivity level, the scale and quantity of industrial park construction in China have an obvious growth trend, which provides a broad space for the development of Chinas construction industry. In the process of analyzing and studying a large number of industrial park data, in order to reasonably carry out environmental protection work, architects must actively participate in the project design process, fully penetrate and integrate the concept of green building design, and then effectively realize the overall optimization of the ecological performance of construction projects, so as to promote the improvement of their comprehensive level. This paper analyzes and summarizes the application of green building design in industrial park construction in China and puts forward corresponding optimization suggestions to further implement the comprehensive quality of industrial park buildings.
文摘Beautiful urban landscape and good urban environment are prerequisites for attracting investment and developing tourism. Urban landscape is closely related to the life of every resident in the city, permeating all walks of life and benefiting the whole society. Reasonable landscape design helps to enhance the vitality of urban economic and social systems. Throughout the development of human civilization, Chinese traditional culture has greatly promoted the spread and development of civilization. Some cultural elements in Chinese traditional culture, such as calligraphy, shadow play and paper cutting, are all concrete expressions of the connotation of Chinese traditional culture. The rational use of some traditional cultural elements in modern landscape design can reflect the national characteristics and promote the common development of the two. Next, the article discusses the application of traditional elements in modern landscape design.
基金supported by the Opening Fund of Key Laboratory of Geological Survey and Evaluation of Ministry of Education(No.GLAB 2024ZR03)the National Natural Science Foundation of China(No.42407248)+2 种基金the Guizhou Provincial Basic Research Program(Natural Science)(No.QKHJC-[2023]-YB066)the Key Laboratory of Smart Earth(No.KF2023YB04-02)the Fundamental Research Funds for the Central Universities。
文摘The constitutive model is essential for predicting the deformation and stability of rocksoil mass.The estimation of constitutive model parameters is a necessary and important task for the reliable characterization of mechanical behaviors.However,constitutive model parameters cannot be evaluated accurately with a limited amount of test data,resulting in uncertainty in the prediction of stress-strain curves.This paper proposes a Bayesian analysis framework to address this issue.It combines the Bayesian updating with the structural reliability and adaptive conditional sampling methods to assess the equation parameter of constitutive models.Based on the triaxial and ring shear tests on shear zone soils from the Huangtupo landslide,a statistical damage constitutive model and a critical state hypoplastic constitutive model were used to demonstrate the effectiveness of the proposed framework.Moreover,the parameter uncertainty effects of the damage constitutive model on landslide stability were investigated.Results show that reasonable assessments of the constitutive model parameter can be well realized.The variability of stress-strain curves is strongly related to the model prediction performance.The estimation uncertainty of constitutive model parameters should not be ignored for the landslide stability calculation.Our study provides a reference for uncertainty analysis and parameter assessment of the constitutive model.
文摘Construction of tunnels in urban areas requires assessment of the impact of tunneling on the stability and integrity of existing pile foundations. We have focused our attention to the analysis of the carrying capacity of pile foundations provided by the impact of construction of urban tunnels on adjacent pile foundations, under the engineering background of the construction of the # 2 Line of the Guangzhou subway. It is carried out using a fast Lagrangian analysis of a continuum in a 3D numerical code, which is an elastoplastic three-dimensional finite difference model, to simulate the response of piles under the entire process of metro tunneling （deactivation of soil element and activation of the lining）. The adjacent stratum around the tunnel is classified into three regions： Zone Ⅰ （upper adjacent stratum of tunnel）, Zone Ⅱ （45°-upper-lateral adjacent stratum of tunnel） and Zone Ⅲ （lateral adjacent stratum of tunnel）. In each region one typical pile is chosen to be calculated and analyzed in detail. Numerical simulations are mainly conducted at three points of each pile shaft： the side-friction force of the pile, the tip resistance of the pile and the axial loading of the pile. A contrasting analysis has been conducted both in the response of typical piles in different regions and from computer calculated values with site monitoring values. The results of numerical simulations show that the impact on carrying capacity of the piles lies mainly in the impact of construction of urban tunnels on the side-friction forces and the tip resistance of piles. The impact differs considerably among the different strata zones where the pile tips are located. The complicated rules of side-friction force and tip resistance of piles has resulted in complicated rules of pile axial loading thus, in the end, it impacts the carrying capacity of pile-foundations. It is necessary to take positive measures, such as stratum grouting stabilization or foundation underpinning, etc, to deal with the carrying capacity and the settlement of pile-foundations. The results are of value to similar engineering projects.
基金jointly supported by the National Key R&D Program of China (2018YFB0605503)the National Natural Science Foundation of China (51804112)+2 种基金the National Key R&D Program of China (2018YFC0807801)the Open Foundation of Key Laboratory of Coal Exploration and Comprehensive Utilization of Ministry of Natural Resources (KF2021-5)the Natural Science Foundation of Hunan Province of China (2018JJ3169).
文摘To accelerate the achievement of China’s carbon neutrality goal and to study the factors affecting the geologic CO_(2)storage in the Ordos Basin,China’s National Key R&D Programs propose to select the Chang 6 oil reservoir of the Yanchang Formation in the Ordos Basin as the target reservoir to conduct the geologic carbon capture and storage(CCS)of 100000 t per year.By applying the basic theories of disciplines such as seepage mechanics,multiphase fluid mechanics,and computational fluid mechanics and quantifying the amounts of CO_(2)captured in gas and dissolved forms,this study investigated the effects of seven factors that influence the CO_(2)storage capacity of reservoirs,namely reservoir porosity,horizontal permeability,temperature,formation stress,the ratio of vertical to horizontal permeability,capillary pressure,and residual gas saturation.The results show that the sensitivity of the factors affecting the gas capture capacity of CO_(2)decreases in the order of formation stress,temperature,residual gas saturation,horizontal permeability,and porosity.Meanwhile,the sensitivity of the factors affecting the dissolution capture capacity of CO_(2)decreases in the order of formation stress,residual gas saturation,temperature,horizontal permeability,and porosity.The sensitivity of the influencing factors can serve as the basis for carrying out a reasonable assessment of sites for future CO_(2)storage areas and for optimizing the design of existing CO_(2)storage areas.The sensitivity analysis of the influencing factors will provide basic data and technical support for implementing geologic CO_(2)storage and will assist in improving geologic CO_(2)storage technologies to achieve China’s carbon neutralization goal.
基金the National Support Projects of the Eleventh Five-year Plan (No. 2006BAJ02B01)the Special Research Projects of Shaanxi Province Education Department (No. 08JK316)the Key Discipline Construction Projects of Shaanxi Province for Funding Support
文摘The thermal energy storage phase change material used for building has been prepared with a few of fatty acids based on the principle of binary low eutectic point. The thermal behaviors such as phase transition temperature and enthalpy of compound energy storage material are researched through differential scanning calorimeter(DSC) and scanning electron microscope(SEM) . The results show that the thermal energy storage phase change composite material can be used in the wall panels well as its higher latent heat.
基金Project(51878103)supported by the National Natural Science Foundation of ChinaProject(2016YFE0200100)supported by the National Key Research and Development Program of China。
文摘To reveal the bearing capacity of the X-section concrete piles pile raft foundation in silica sand,a series of vertical load tests are carried out.The X-section concrete piles are compared with circular section pile with the same section area.The load−settlement curves,axial force and skin friction,strain on concave and convex edge of the pile,pile-sand stress ratio,distributions of side and tip resistance are presented.The results show that bearing capacity of the X section concrete pile raft foundation is much larger than that of the circular pile raft foundation.Besides,compared with the circular pile,the peak axial force of X-section piles under raft is deeper and smaller while the neutral point of X-section concrete pile is deeper.Moreover,the strain on the concave edge is much larger than that on the convex edge of the pile,and the convex edge has more potential in bearing capacity as the vertical load increases.The X-section pile has higher pile-sand stress ratios and load-sharing between side resistance and tip resistance.Above all,the X-section concrete pile can significantly increase the bearing capacity of pile-raft foundations in silica sand.
