In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated mo...In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated model of radio-frequency identification (RFID) and four-dimensional Computer-Aided Design (4D CAD) in construction management. RFID involves the use of tags that collect data and transmit data. RFID can collect data by radio waves instead of light waves. RFID technology is surpassing barcode technology where light waves are easily blocked and barcode labels are easy to fall off or become unreadable due to dust, dirt, or other contaminants. 4D CAD which involves 3D construction models and construction schedules presents visualized construction process. Integration of RFID and 4D CAD in this paper built a dynamic construction management and control system which would reduce the time of capturing data on site and control quality of construction materials efficiently. Pilot test result shows that a construction manager can easily understand how and what a complicated construction project will be accomplished. Although further analysis is necessary, RFID and 4D CAD show promises of being a beneficial technology in construction management.展开更多
The construction of megaprojects has always resulted in extensive and long-term impacts on the society.However,the performance of megaproject management is poor,and improving it remains an urgent and necessary issue.A...The construction of megaprojects has always resulted in extensive and long-term impacts on the society.However,the performance of megaproject management is poor,and improving it remains an urgent and necessary issue.Although many studies on megaproject success have been conducted,existing studies on the driving factors of successful megaproject construction are rather limited.Therefore,this study aims to systematically explore the key factors that can lead to successful megaproject construction management based on three cases:The Beijing-Shanghai High-Speed Railway,the Three Gorges Dam,and the Hong Kong-Zhuhai-Macao Bridge.Mixed research methods,such as literature review,case studies,and expert interviews,were used in this study.Consequently,11 driving factors,namely,government support,public support,accumulation and application of technology and experience,development and innovation of technology,innovation and application of management system,organizational mode and structure,top management support,project culture,megaproject citizenship behavior,corporate reputation,and fulfillment of social responsibilities,were identified and grouped into five categories,namely,project environment,construction capabilities,organization,positive culture and behavior,and requirements for sustainable development.The contributions of this study lie in two aspects.First,the driving factors of successful megaproject construction are identified to deepen the understanding of industrial practitioners,assist them in focusing on key factors,and aid them in effectively managing megaprojects.Second,researchers could use the identified driving factors in conducting further empirical studies and apply them in future projects to enhance their chances of success.展开更多
Construction companies face threats from competition and must be able to adjust to modem technology and changes in customer expectations. These issues require efficient risk management techniques. The success of const...Construction companies face threats from competition and must be able to adjust to modem technology and changes in customer expectations. These issues require efficient risk management techniques. The success of construction companies running projects in international markets depends on how the risks arise from the host country conditions as well as the project specific risk factors. Successful management of risks requires identification of risks, construction of a risk model which can be used to assess the magnitude of risks, and implementation of response strategies so that an acceptable risk-return balance can be achieved. The project success usually depends on the combination of all risks, response strategies used to mitigate risks, and a company＇s ability to manage them. There exists a need to develop risk models containing the risks of doing business in international markets and factors that affect manageability of these risks. One of the market＇s critical challenges is scheduled management and the understanding and application of program management. This paper uses systematic risk identification, classification and analysis, and measurement and response methodologies to help international contractors quantify the risks of project development and accomplishment.展开更多
Based on the general high-quality development requirements for railway construction in the new era,combined with the new concept of railway passenger stations of China State Railway Group Co.Ltd,namely"being well...Based on the general high-quality development requirements for railway construction in the new era,combined with the new concept of railway passenger stations of China State Railway Group Co.Ltd,namely"being well-connected,fully-integrated,environmeni-friendlypassenger-oriented,economically-efficient,culturally-rich,intelligent and convenient"and aiming at the construction of exemplary passenger station projects,this paper summarizes the construction experience in construction,decoration furnishing culture and art expression of railway passenger stations,proposes the working patterns of formulating the implementation plans of exemplary railway passenger station projects and the expert reviews in innovative way studies and forms 6 special-subject designs such as for colorshape,space,environment,art and culture,as wellas the specific design requirements for 13 key areas including waiting hall entrance and exit corridor;VIP room,etc.,and summarizes and puts forward the construction management system of railway passenger stations in the new era,so as to ensure the expected exemplary project quality of railway passenger stations.展开更多
The purpose of this study was to assess the acceptance of a model of construction and demolition waste-minimization practices by construction management senior students.This approach assumed students can informally in...The purpose of this study was to assess the acceptance of a model of construction and demolition waste-minimization practices by construction management senior students.This approach assumed students can informally influence construction industry opinions,making their decisions vital to future construction-management education standards.The capstone class of the bachelor’s degree program of one of the foremost construction management programs in the country was the sample chosen to study.It was found that a majority of the students were knowledgeable about all of the practices and had favorable opinions based on that knowledge.Most had tried more than half of the practices on a limited basis and decided they would use the practices based on these trials.The largest part of the students did not have experience applying a good number of the practices;however,almost all of those with this experience would continue to use all the practices.Identifying successful trial and application experiences and asking students how they became involved in such experiences would be useful in the implementation of a school plan to increase acceptance.展开更多
Construction safety management is the key work to ensure the overall construction quality. At present, some construction enterprises do not have a complete safety management system, the person in charge of the lack of...Construction safety management is the key work to ensure the overall construction quality. At present, some construction enterprises do not have a complete safety management system, the person in charge of the lack of safety management awareness, which is not conducive to the development of construction safety control work. In order to reduce the occurrence of safety accidents to the maximum extent, the construction leaders of construction enterprise also need to formulate reasonable and effective safety control regulations according to the construction site, and manage construction equipment and construction personnel scientifically. At the same time, relevant technical personnel of construction enterprises should also introduce new technologies and equipment related to production and reduce the direct contact of construction personnel to high-risk facilities, so as to promote the stable development of construction work under the premise of ensuring safety.展开更多
This paper introduces the research on construction quality management of OD 1422mX80 pipeline project. OD1422mm X80 pipe has been applied in the east line natural gas pipeline project between China and Russia for the ...This paper introduces the research on construction quality management of OD 1422mX80 pipeline project. OD1422mm X80 pipe has been applied in the east line natural gas pipeline project between China and Russia for the first time. Through the research on the establishment of the quality system, process control and target evaluation of the east line pipeline between China and Russia, it can provide reference and reference for the construction quality management of OD 1422 mm X80 pipeline project in the future.展开更多
The integration of Human-Robot Collaboration(HRC)into Virtual Reality(VR)technology is transforming industries by enhancing workforce skills,improving safety,and optimizing operational processes and efficiency through...The integration of Human-Robot Collaboration(HRC)into Virtual Reality(VR)technology is transforming industries by enhancing workforce skills,improving safety,and optimizing operational processes and efficiency through realistic simulations of industry-specific scenarios.Despite the growing adoption of VR integrated with HRC,comprehensive reviews of current research in HRC-VR within the construction and manufacturing fields are lacking.This review examines the latest advances in designing and implementing HRC using VR technology in these industries.The aim is to address the application domains of HRC-VR,types of robots used,VR setups,and software solutions used.To achieve this,a systematic literature review using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses methodology was conducted on the Web of Science and Google Scholar databases,analyzing 383 articles and selecting 53 papers that met the established selection criteria.The findings emphasize a significant focus on enhancing human-robot interaction with a trend toward using immersive VR experiences and interactive 3D content creation tools.However,the integration of HRC with VR,especially in the dynamic construction environment,presents unique challenges and opportunities for future research,including developing more realistic simulations and adaptable robot systems.This paper offers insights for researchers,practitioners,educators,industry professionals,and policymakers interested in leveraging the integration of HRC with VR in construction and manufacturing industries.展开更多
The construction projects’ dynamic and interconnected nature requires a comprehensive understanding of complexity during pre-construction. Traditional tools such as Gantt charts, CPM, and PERT often overlook uncertai...The construction projects’ dynamic and interconnected nature requires a comprehensive understanding of complexity during pre-construction. Traditional tools such as Gantt charts, CPM, and PERT often overlook uncertainties. This study identifies 20 complexity factors through expert interviews and literature, categorising them into six groups. The Analytical Hierarchy Process evaluated the significance of different factors, establishing their corresponding weights to enhance adaptive project scheduling. A system dynamics (SD) model is developed and tested to evaluate the dynamic behaviour of identified complexity factors. The model simulates the impact of complexity on total project duration (TPD), revealing significant deviations from initial deterministic estimates. Data collection and analysis for reliability tests, including normality and Cronbach alpha, to validate the model’s components and expert feedback. Sensitivity analysis confirmed a positive relationship between complexity and project duration, with higher complexity levels resulting in increased TPD. This relationship highlights the inadequacy of static planning approaches and underscores the importance of addressing complexity dynamically. The study provides a framework for enhancing planning systems through system dynamics and recommends expanding the model to ensure broader applicability in diverse construction projects.展开更多
Accurate cost estimation at the early stage of a construction project is key factor in a project’s success. But it is difficult to quickly and accurately estimate construction costs at the planning stage, when drawin...Accurate cost estimation at the early stage of a construction project is key factor in a project’s success. But it is difficult to quickly and accurately estimate construction costs at the planning stage, when drawings, documentation and the like are still incomplete. As such, various techniques have been applied to accurately estimate construction costs at an early stage, when project information is limited. While the various techniques have their pros and cons, there has been little effort made to determine the best technique in terms of cost estimating performance. The objective of this research is to compare the accuracy of three estimating techniques (regression analysis (RA), neural network (NN), and support vector machine techniques (SVM)) by performing estimations of construction costs. By comparing the accuracy of these techniques using historical cost data, it was found that NN model showed more accurate estimation results than the RA and SVM models. Consequently, it is determined that NN model is most suitable for estimating the cost of school building projects.展开更多
The purpose of the comprehensive benefit evaluation of the existing building energy saving renovation project is to promote the healthy development of the energy saving reconstruction. Therefore, it is necessary to re...The purpose of the comprehensive benefit evaluation of the existing building energy saving renovation project is to promote the healthy development of the energy saving reconstruction. Therefore, it is necessary to reflect the value and function of incentive and restraint. The concrete embodiment is that: improving energy saving standard renovation of existing buildings, promoting the construction of energy efficiency labeling system, and strengthening the construction of government supervision system by the comprehensive benefit evaluation.展开更多
Completing the principal engineering components of a pumped storage power station spans between 50 and 60 months,from the inception of construction to the commencement of power generation by the first unit.The filling...Completing the principal engineering components of a pumped storage power station spans between 50 and 60 months,from the inception of construction to the commencement of power generation by the first unit.The filling of the penstock with water represents a critical phase preceding the production of electricity by the first unit.During this interval,the construction of the diversion shaft presents multiple challenges,including intricate construction procedures,considerable construction difficulty,elevated safety risks,and quality control issues.To address this issue,this study uses CFD software to analyze the flow field,pressure gradient,and head loss of shaft curved section with different curvature radius,and examines several key technologies by drawing on the practice of diversion shaft construction at the Meizhou pumped storage power station.These technologies include optimizing the curvature radius of the curved section of diversion shaft,reverse-well excavation for the shaft,and sliding-up for the lining concrete.It is found that as the curvature radius of shaft curved section reduces from 4 to 2 times the shaft diameter,the hydraulic characteristic index does not change much,and the increase of head loss accounts for about 0.18%of the total head loss of the water conveyance system.The result show that optimizing the curvature radius from 4 times to 2 times the shaft diameter is feasible and reasonable,and several improved technical measures have been proposed,such as stabilizing drill rods,mechanical scraper systems,and control technology of the relationship between concrete setting time and formwork sliding.Their implementation effectively mitigates difficulties and safety risks during shaft construction,expedites the project schedule,enhances engineering quality,and creates a 41-month timeline for the principal engineering schedule for the first power unit generation in China.展开更多
Concern for the environmental impact of organizations＇ activities has led to the recognition and demand for organizations to manage and report on their carbon footprint. However, there is no limit as to the areas of ...Concern for the environmental impact of organizations＇ activities has led to the recognition and demand for organizations to manage and report on their carbon footprint. However, there is no limit as to the areas of carbon footprints required in such annual environmental reports. To deliver improvements in the quality of carbon footprint management and reporting, there is a need to identify the main elements of carbon footprint strategy that can be endorsed, supported and encouraged by facility managers. The study investigates carbon footprint elements managed and reported upon by facility manager in the UK. Drawing on a questionnaire survey of 256 facility managers in the UK, the key elements of carbon footprints identified in carbon footprint reports are examined. The findings indicate that the main elements are building energy consumption, waste disposal and water consumption. Business travel in terms of using public transport, air travel and company cars are also recognized as important targets and objectives for the carbon footprint strategy of several FM （facilities management） organizations.展开更多
The energy-saving reconstruction market of existing buildings is a complex system.It includes three subsystems:service market,capital market and technology market.The service market takes the relationship between ener...The energy-saving reconstruction market of existing buildings is a complex system.It includes three subsystems:service market,capital market and technology market.The service market takes the relationship between energy service companies and owners as the core to establish service associated relationships.The capital market is based on the mechanism of"investment guarantees and risk sharing"to form structures of the capital market.The technology market relies on the"industry-university-research"mode to build technology supporting platforms.Being interdependent and mutually restricted,the three subsystems form the complete system of existing buildings in energy-saving reconstruction.展开更多
The market development and policy matching of existing building energy-saving retrofits determine the effectiveness of policies in promoting the operation of existing building energy-saving retrofit market.Based on th...The market development and policy matching of existing building energy-saving retrofits determine the effectiveness of policies in promoting the operation of existing building energy-saving retrofit market.Based on the perspective of market development to evaluate the effectiveness of existing building energy-saving transformation policy,it is necessary to clarify the basic connotation of the effectiveness of existing building energy-saving transformation policy,systematically analyze the evaluation content,construct a multi-level evaluation index system,and select scientific and effective quantitative evaluation methods to implement a strict evaluation process.展开更多
The construction industry has been considered an accident prone industry. Alarming statistics indicate thatthe construction industry accounts for 55,000 fatal injuries each year. That is because construction sites are...The construction industry has been considered an accident prone industry. Alarming statistics indicate thatthe construction industry accounts for 55,000 fatal injuries each year. That is because construction sites are often filled with potential hazards that can lead to serious injury or death. Responsibility for these injuries may be attributed to a variety of individuals including owners, contractors or subcontractors, engineers, equipment manufacturers, and architects. This mandated a new safety culture to emerge resulting in a decline in the incidence rate of all recordable nonfatal injury and illness for construction workers. This study explores the safety culture encountered in twolarge construction companies in the USA and Egypt, over the last five years. Comparison of the results recorded in both companies was also conducted. The study also investigated the benefits of focusing on the occupational health in the construction field in Egypt and USA. In addition to the literature review, the research methodology used for this study was inspired by the Contextual Design (CD) Methodology. The study indicated thepositive impact of implementing safety programs on significantly reducing the recordable injuries. It also showed the benefits of focusing on occupational health and wellness, training, and education of workers.展开更多
With rapid development of the construction industry in China, lots of construction materials are being widely reused. Meanwhile, more and more materials for building remover or demolition enter into the environment as...With rapid development of the construction industry in China, lots of construction materials are being widely reused. Meanwhile, more and more materials for building remover or demolition enter into the environment as a result. However, China is facing big building garbage pollution, with simple disposal methods and low efficiency, which urgently needs to be improved. The paper takes Chongqing as an example to illustrate existing problems in this field and then puts forward corresponding countermeasures from the aspects of economy, technology, management and policy, aiming at enhancing the level of construction waste disposal in China.展开更多
“Exit barrier” means the obstacle keeping enterprises from competing even though their profits may be negative. This paper presents quantitative research on the exit barrier’s effect on the Chinese construction ind...“Exit barrier” means the obstacle keeping enterprises from competing even though their profits may be negative. This paper presents quantitative research on the exit barrier’s effect on the Chinese construction industry using questionnaire investigation. The exit barrier was classified into six categories, and then the categories were ranked and analyzed according to the respondents from the state-owned enterprises (SOEs) and non state-owned enterprises (NSOEs), respectively. The main obstacles related to the exit barrier in SOEs and NSOEs were revealed. Finally, suggestions were provided to diminish the exit barrier effect on the construction industry.展开更多
The demand for monitoring activities has been more evident recently in oil and gas“O&G”activities such as exploration,drilling,production,logistics,or shipping.Consequently,these offshore infrastructures require...The demand for monitoring activities has been more evident recently in oil and gas“O&G”activities such as exploration,drilling,production,logistics,or shipping.Consequently,these offshore infrastructures require asset management(or facilities management).This study seeks to understand the research pattern of publications within the domain of asset management in offshore infrastructures with the aim of determining the present state of the field’s research.The paper conducts a scientometric analysis of publications that focus on offshore infrastructures’asset management published between 1992 and 2022.The employed search query yielded a total of 346 journal articles from the Scopus database and 43 from the Web of Science(WoS)database,respectively.The data analysis of the scientometric investigation explored research authorship,co-occurrence of keywords,number of publications,network mapping,country geographical breakdown,and literature coupling.The paper shows rising interest in monitoring and asset management in the oil and gas industry.It was concluded that the management of these infrastructures requires frequent review with the application of sustainable asset management strategies.展开更多
In 1997, the Ohio Senate passed Senate Bill 102 which established the Ohio School Facilities Commission as a separate agency to oversee the rebuilding projects of the public schools in Ohio. The bill also exempted the...In 1997, the Ohio Senate passed Senate Bill 102 which established the Ohio School Facilities Commission as a separate agency to oversee the rebuilding projects of the public schools in Ohio. The bill also exempted the construction contractors from paying prevailing wages on these projects on the hypothesis that this exemption would lower the construction cost. The purpose of this study is to investigate this hypothesis through the statistical analysis of 8,093 bids received from the years 2000 through 2007 for the schools＇ construction. Union contractors who paid their workers union wages and non-union contractors who did not pay prevailing wages bid these projects. The hypothesis, that prevailing wage laws increased the construction cost, was tested by comparing the bids/SF （square foot） from both groups （union and nonunion） for the different construction trades. The study indicated that there was statistical significant difference between the bids/square foot for union contractors and the bids/square foot for non-union contractors for only the following trades： earthwork, existing conditions, plumbing, electrical and HVAC （heating, ventilation and air conditioning）. The averages of bids/SF from the union contractors were higher than those from the non-union contractors for earthwork, existing conditions and plumbing works, and the opposite for electrical and HVAC works. There was no statistical significant difference in the bids from the communications, concrete, conveying equipment, electronic safety and security, equipment, finishes, fire suppression, furnishings, masonry, openings, structural steel, thermal and moisture protection, plastics and composites and wood works.展开更多
文摘In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated model of radio-frequency identification (RFID) and four-dimensional Computer-Aided Design (4D CAD) in construction management. RFID involves the use of tags that collect data and transmit data. RFID can collect data by radio waves instead of light waves. RFID technology is surpassing barcode technology where light waves are easily blocked and barcode labels are easy to fall off or become unreadable due to dust, dirt, or other contaminants. 4D CAD which involves 3D construction models and construction schedules presents visualized construction process. Integration of RFID and 4D CAD in this paper built a dynamic construction management and control system which would reduce the time of capturing data on site and control quality of construction materials efficiently. Pilot test result shows that a construction manager can easily understand how and what a complicated construction project will be accomplished. Although further analysis is necessary, RFID and 4D CAD show promises of being a beneficial technology in construction management.
基金This study was funded by the National Natural Science Foundation of China(Grant Nos.71971161 and 71390523).
文摘The construction of megaprojects has always resulted in extensive and long-term impacts on the society.However,the performance of megaproject management is poor,and improving it remains an urgent and necessary issue.Although many studies on megaproject success have been conducted,existing studies on the driving factors of successful megaproject construction are rather limited.Therefore,this study aims to systematically explore the key factors that can lead to successful megaproject construction management based on three cases:The Beijing-Shanghai High-Speed Railway,the Three Gorges Dam,and the Hong Kong-Zhuhai-Macao Bridge.Mixed research methods,such as literature review,case studies,and expert interviews,were used in this study.Consequently,11 driving factors,namely,government support,public support,accumulation and application of technology and experience,development and innovation of technology,innovation and application of management system,organizational mode and structure,top management support,project culture,megaproject citizenship behavior,corporate reputation,and fulfillment of social responsibilities,were identified and grouped into five categories,namely,project environment,construction capabilities,organization,positive culture and behavior,and requirements for sustainable development.The contributions of this study lie in two aspects.First,the driving factors of successful megaproject construction are identified to deepen the understanding of industrial practitioners,assist them in focusing on key factors,and aid them in effectively managing megaprojects.Second,researchers could use the identified driving factors in conducting further empirical studies and apply them in future projects to enhance their chances of success.
文摘Construction companies face threats from competition and must be able to adjust to modem technology and changes in customer expectations. These issues require efficient risk management techniques. The success of construction companies running projects in international markets depends on how the risks arise from the host country conditions as well as the project specific risk factors. Successful management of risks requires identification of risks, construction of a risk model which can be used to assess the magnitude of risks, and implementation of response strategies so that an acceptable risk-return balance can be achieved. The project success usually depends on the combination of all risks, response strategies used to mitigate risks, and a company＇s ability to manage them. There exists a need to develop risk models containing the risks of doing business in international markets and factors that affect manageability of these risks. One of the market＇s critical challenges is scheduled management and the understanding and application of program management. This paper uses systematic risk identification, classification and analysis, and measurement and response methodologies to help international contractors quantify the risks of project development and accomplishment.
文摘Based on the general high-quality development requirements for railway construction in the new era,combined with the new concept of railway passenger stations of China State Railway Group Co.Ltd,namely"being well-connected,fully-integrated,environmeni-friendlypassenger-oriented,economically-efficient,culturally-rich,intelligent and convenient"and aiming at the construction of exemplary passenger station projects,this paper summarizes the construction experience in construction,decoration furnishing culture and art expression of railway passenger stations,proposes the working patterns of formulating the implementation plans of exemplary railway passenger station projects and the expert reviews in innovative way studies and forms 6 special-subject designs such as for colorshape,space,environment,art and culture,as wellas the specific design requirements for 13 key areas including waiting hall entrance and exit corridor;VIP room,etc.,and summarizes and puts forward the construction management system of railway passenger stations in the new era,so as to ensure the expected exemplary project quality of railway passenger stations.
文摘The purpose of this study was to assess the acceptance of a model of construction and demolition waste-minimization practices by construction management senior students.This approach assumed students can informally influence construction industry opinions,making their decisions vital to future construction-management education standards.The capstone class of the bachelor’s degree program of one of the foremost construction management programs in the country was the sample chosen to study.It was found that a majority of the students were knowledgeable about all of the practices and had favorable opinions based on that knowledge.Most had tried more than half of the practices on a limited basis and decided they would use the practices based on these trials.The largest part of the students did not have experience applying a good number of the practices;however,almost all of those with this experience would continue to use all the practices.Identifying successful trial and application experiences and asking students how they became involved in such experiences would be useful in the implementation of a school plan to increase acceptance.
文摘Construction safety management is the key work to ensure the overall construction quality. At present, some construction enterprises do not have a complete safety management system, the person in charge of the lack of safety management awareness, which is not conducive to the development of construction safety control work. In order to reduce the occurrence of safety accidents to the maximum extent, the construction leaders of construction enterprise also need to formulate reasonable and effective safety control regulations according to the construction site, and manage construction equipment and construction personnel scientifically. At the same time, relevant technical personnel of construction enterprises should also introduce new technologies and equipment related to production and reduce the direct contact of construction personnel to high-risk facilities, so as to promote the stable development of construction work under the premise of ensuring safety.
文摘This paper introduces the research on construction quality management of OD 1422mX80 pipeline project. OD1422mm X80 pipe has been applied in the east line natural gas pipeline project between China and Russia for the first time. Through the research on the establishment of the quality system, process control and target evaluation of the east line pipeline between China and Russia, it can provide reference and reference for the construction quality management of OD 1422 mm X80 pipeline project in the future.
基金Supported by National Science Foundation under Grant No.2222881.
文摘The integration of Human-Robot Collaboration(HRC)into Virtual Reality(VR)technology is transforming industries by enhancing workforce skills,improving safety,and optimizing operational processes and efficiency through realistic simulations of industry-specific scenarios.Despite the growing adoption of VR integrated with HRC,comprehensive reviews of current research in HRC-VR within the construction and manufacturing fields are lacking.This review examines the latest advances in designing and implementing HRC using VR technology in these industries.The aim is to address the application domains of HRC-VR,types of robots used,VR setups,and software solutions used.To achieve this,a systematic literature review using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses methodology was conducted on the Web of Science and Google Scholar databases,analyzing 383 articles and selecting 53 papers that met the established selection criteria.The findings emphasize a significant focus on enhancing human-robot interaction with a trend toward using immersive VR experiences and interactive 3D content creation tools.However,the integration of HRC with VR,especially in the dynamic construction environment,presents unique challenges and opportunities for future research,including developing more realistic simulations and adaptable robot systems.This paper offers insights for researchers,practitioners,educators,industry professionals,and policymakers interested in leveraging the integration of HRC with VR in construction and manufacturing industries.
文摘The construction projects’ dynamic and interconnected nature requires a comprehensive understanding of complexity during pre-construction. Traditional tools such as Gantt charts, CPM, and PERT often overlook uncertainties. This study identifies 20 complexity factors through expert interviews and literature, categorising them into six groups. The Analytical Hierarchy Process evaluated the significance of different factors, establishing their corresponding weights to enhance adaptive project scheduling. A system dynamics (SD) model is developed and tested to evaluate the dynamic behaviour of identified complexity factors. The model simulates the impact of complexity on total project duration (TPD), revealing significant deviations from initial deterministic estimates. Data collection and analysis for reliability tests, including normality and Cronbach alpha, to validate the model’s components and expert feedback. Sensitivity analysis confirmed a positive relationship between complexity and project duration, with higher complexity levels resulting in increased TPD. This relationship highlights the inadequacy of static planning approaches and underscores the importance of addressing complexity dynamically. The study provides a framework for enhancing planning systems through system dynamics and recommends expanding the model to ensure broader applicability in diverse construction projects.
文摘Accurate cost estimation at the early stage of a construction project is key factor in a project’s success. But it is difficult to quickly and accurately estimate construction costs at the planning stage, when drawings, documentation and the like are still incomplete. As such, various techniques have been applied to accurately estimate construction costs at an early stage, when project information is limited. While the various techniques have their pros and cons, there has been little effort made to determine the best technique in terms of cost estimating performance. The objective of this research is to compare the accuracy of three estimating techniques (regression analysis (RA), neural network (NN), and support vector machine techniques (SVM)) by performing estimations of construction costs. By comparing the accuracy of these techniques using historical cost data, it was found that NN model showed more accurate estimation results than the RA and SVM models. Consequently, it is determined that NN model is most suitable for estimating the cost of school building projects.
基金supported by Nature Science Foundation of China (Grant No. 71171141)Soft Science Research Project of MOE (Grant No. 2013-R1-14)Social Science Planning Project in Tianjin City (Grant No. TJGLHQ1403)
文摘The purpose of the comprehensive benefit evaluation of the existing building energy saving renovation project is to promote the healthy development of the energy saving reconstruction. Therefore, it is necessary to reflect the value and function of incentive and restraint. The concrete embodiment is that: improving energy saving standard renovation of existing buildings, promoting the construction of energy efficiency labeling system, and strengthening the construction of government supervision system by the comprehensive benefit evaluation.
文摘Completing the principal engineering components of a pumped storage power station spans between 50 and 60 months,from the inception of construction to the commencement of power generation by the first unit.The filling of the penstock with water represents a critical phase preceding the production of electricity by the first unit.During this interval,the construction of the diversion shaft presents multiple challenges,including intricate construction procedures,considerable construction difficulty,elevated safety risks,and quality control issues.To address this issue,this study uses CFD software to analyze the flow field,pressure gradient,and head loss of shaft curved section with different curvature radius,and examines several key technologies by drawing on the practice of diversion shaft construction at the Meizhou pumped storage power station.These technologies include optimizing the curvature radius of the curved section of diversion shaft,reverse-well excavation for the shaft,and sliding-up for the lining concrete.It is found that as the curvature radius of shaft curved section reduces from 4 to 2 times the shaft diameter,the hydraulic characteristic index does not change much,and the increase of head loss accounts for about 0.18%of the total head loss of the water conveyance system.The result show that optimizing the curvature radius from 4 times to 2 times the shaft diameter is feasible and reasonable,and several improved technical measures have been proposed,such as stabilizing drill rods,mechanical scraper systems,and control technology of the relationship between concrete setting time and formwork sliding.Their implementation effectively mitigates difficulties and safety risks during shaft construction,expedites the project schedule,enhances engineering quality,and creates a 41-month timeline for the principal engineering schedule for the first power unit generation in China.
文摘Concern for the environmental impact of organizations＇ activities has led to the recognition and demand for organizations to manage and report on their carbon footprint. However, there is no limit as to the areas of carbon footprints required in such annual environmental reports. To deliver improvements in the quality of carbon footprint management and reporting, there is a need to identify the main elements of carbon footprint strategy that can be endorsed, supported and encouraged by facility managers. The study investigates carbon footprint elements managed and reported upon by facility manager in the UK. Drawing on a questionnaire survey of 256 facility managers in the UK, the key elements of carbon footprints identified in carbon footprint reports are examined. The findings indicate that the main elements are building energy consumption, waste disposal and water consumption. Business travel in terms of using public transport, air travel and company cars are also recognized as important targets and objectives for the carbon footprint strategy of several FM （facilities management） organizations.
基金supported by National Natural Science Fundation of China(Grant No.71573188)Later-stage Humanities and Social Sciences Subsidized Project of Ministry of Education(Grant No.16JHQ031)Tianjin Social Sciences Planning Post-funded Projects(Grant No.TJGLHQ1403).
文摘The energy-saving reconstruction market of existing buildings is a complex system.It includes three subsystems:service market,capital market and technology market.The service market takes the relationship between energy service companies and owners as the core to establish service associated relationships.The capital market is based on the mechanism of"investment guarantees and risk sharing"to form structures of the capital market.The technology market relies on the"industry-university-research"mode to build technology supporting platforms.Being interdependent and mutually restricted,the three subsystems form the complete system of existing buildings in energy-saving reconstruction.
基金supported by the National Natural Fund of China(Grant No.71872122)Later Stage Support Project of Philosophy and Social Sciences Research of the Ministry of Education of China(Grant No.16JHQ031)+1 种基金Later Stage Support Project of Tianjin Social Science Planning(Grant No.TJGLHQ1403)Higher Education Innovation Team of Tianjin(Grant No.TD13-5006)。
文摘The market development and policy matching of existing building energy-saving retrofits determine the effectiveness of policies in promoting the operation of existing building energy-saving retrofit market.Based on the perspective of market development to evaluate the effectiveness of existing building energy-saving transformation policy,it is necessary to clarify the basic connotation of the effectiveness of existing building energy-saving transformation policy,systematically analyze the evaluation content,construct a multi-level evaluation index system,and select scientific and effective quantitative evaluation methods to implement a strict evaluation process.
文摘The construction industry has been considered an accident prone industry. Alarming statistics indicate thatthe construction industry accounts for 55,000 fatal injuries each year. That is because construction sites are often filled with potential hazards that can lead to serious injury or death. Responsibility for these injuries may be attributed to a variety of individuals including owners, contractors or subcontractors, engineers, equipment manufacturers, and architects. This mandated a new safety culture to emerge resulting in a decline in the incidence rate of all recordable nonfatal injury and illness for construction workers. This study explores the safety culture encountered in twolarge construction companies in the USA and Egypt, over the last five years. Comparison of the results recorded in both companies was also conducted. The study also investigated the benefits of focusing on the occupational health in the construction field in Egypt and USA. In addition to the literature review, the research methodology used for this study was inspired by the Contextual Design (CD) Methodology. The study indicated thepositive impact of implementing safety programs on significantly reducing the recordable injuries. It also showed the benefits of focusing on occupational health and wellness, training, and education of workers.
基金Funded by 2011 Construction Science and Technology Project of Chongqing Municipal Commission of Urban-Rural Development(No.2011-1-8)
文摘With rapid development of the construction industry in China, lots of construction materials are being widely reused. Meanwhile, more and more materials for building remover or demolition enter into the environment as a result. However, China is facing big building garbage pollution, with simple disposal methods and low efficiency, which urgently needs to be improved. The paper takes Chongqing as an example to illustrate existing problems in this field and then puts forward corresponding countermeasures from the aspects of economy, technology, management and policy, aiming at enhancing the level of construction waste disposal in China.
文摘“Exit barrier” means the obstacle keeping enterprises from competing even though their profits may be negative. This paper presents quantitative research on the exit barrier’s effect on the Chinese construction industry using questionnaire investigation. The exit barrier was classified into six categories, and then the categories were ranked and analyzed according to the respondents from the state-owned enterprises (SOEs) and non state-owned enterprises (NSOEs), respectively. The main obstacles related to the exit barrier in SOEs and NSOEs were revealed. Finally, suggestions were provided to diminish the exit barrier effect on the construction industry.
基金The School of Engineering,Lancaster University,UK and the Engineering and Physical Sciences Research Council(EPSRC)’s Doctoral Training Centre(DTC),UK are highly appreciatedMoreso,the Foreign Postgraduate Scholarship of Niger Delta Development Commission(NDDC)Nigeria are also valued for financial support as well as the BOLD25 Initiative of Universiti Tenaga Nasional(UNITEN),Malaysia.
文摘The demand for monitoring activities has been more evident recently in oil and gas“O&G”activities such as exploration,drilling,production,logistics,or shipping.Consequently,these offshore infrastructures require asset management(or facilities management).This study seeks to understand the research pattern of publications within the domain of asset management in offshore infrastructures with the aim of determining the present state of the field’s research.The paper conducts a scientometric analysis of publications that focus on offshore infrastructures’asset management published between 1992 and 2022.The employed search query yielded a total of 346 journal articles from the Scopus database and 43 from the Web of Science(WoS)database,respectively.The data analysis of the scientometric investigation explored research authorship,co-occurrence of keywords,number of publications,network mapping,country geographical breakdown,and literature coupling.The paper shows rising interest in monitoring and asset management in the oil and gas industry.It was concluded that the management of these infrastructures requires frequent review with the application of sustainable asset management strategies.
文摘In 1997, the Ohio Senate passed Senate Bill 102 which established the Ohio School Facilities Commission as a separate agency to oversee the rebuilding projects of the public schools in Ohio. The bill also exempted the construction contractors from paying prevailing wages on these projects on the hypothesis that this exemption would lower the construction cost. The purpose of this study is to investigate this hypothesis through the statistical analysis of 8,093 bids received from the years 2000 through 2007 for the schools＇ construction. Union contractors who paid their workers union wages and non-union contractors who did not pay prevailing wages bid these projects. The hypothesis, that prevailing wage laws increased the construction cost, was tested by comparing the bids/SF （square foot） from both groups （union and nonunion） for the different construction trades. The study indicated that there was statistical significant difference between the bids/square foot for union contractors and the bids/square foot for non-union contractors for only the following trades： earthwork, existing conditions, plumbing, electrical and HVAC （heating, ventilation and air conditioning）. The averages of bids/SF from the union contractors were higher than those from the non-union contractors for earthwork, existing conditions and plumbing works, and the opposite for electrical and HVAC works. There was no statistical significant difference in the bids from the communications, concrete, conveying equipment, electronic safety and security, equipment, finishes, fire suppression, furnishings, masonry, openings, structural steel, thermal and moisture protection, plastics and composites and wood works.
