In recent years,China’s society and economy has been developing very rapidly,and various industries are showing a trend of vigorous development.The importance of control and management of project cost in highway proj...In recent years,China’s society and economy has been developing very rapidly,and various industries are showing a trend of vigorous development.The importance of control and management of project cost in highway project management is becoming more and more prominent.PPP model has been widely used in the control and management of highway project cost with its own unique advantages.The author analyzes the important advantages of the PPP model and the existing problems in the cost control and management of highway projects,and puts forward effective measures for the cost control and management of highway projects using the PPP model,in hope of helping with the smooth implementation of the work.展开更多
The"replacement of business tax by VAT reform"(hereby refer to as"VAT reform"for short)is a newly promulgated and implemented tax policy,and its impact on various industries in China is very differ...The"replacement of business tax by VAT reform"(hereby refer to as"VAT reform"for short)is a newly promulgated and implemented tax policy,and its impact on various industries in China is very different,and the highway project industry is no exception.The implementation of the"VAT reform"will not only have a positive impact on the cost of highway projects,but will also have some negative impacts.For this reason,highway project construction corporates must actively respond.The author explores and analyzes the positive and negative effects of the"VAT reform"on the cost of highway projects,and proposes a reform strategy for highway project cost work under the background of the"VAT reform",in hope of helping with bringing out the intrinsic value of highway project cost management work.展开更多
Egypt construction projects are associated with different levels of risks. The lack of familiarity of project management standards is one of the common risks in the construction industry in Egypt. The main aim of this...Egypt construction projects are associated with different levels of risks. The lack of familiarity of project management standards is one of the common risks in the construction industry in Egypt. The main aim of this paper is to identify the most significant risk factors affecting highway construction project in Egypt to decrease the likelihood and impact of those risks. The research method starts with extensive literature review to provide a prime risk factors list which was also augmented to expertise to reach final risk factor list which contains all risks that may be faced during highway construction. Subsequently, a set of 12 risk groups consisting of 73 risks was selected and a questionnaire survey was conducted to determine the likelihood and consequences of the identified risks. Later, a software application was developed using MATLAB to facilitate risk evaluation of highways projects. Results indicated that the risk factors arise from owner side is one of the most common risk factors in the construction industry in Egypt as the owner in the majority of construction project in Egypt is the governmental sector, however, the overall project risk of highway construction projects in Egypt is considered as at a medium level.展开更多
The literature mentions multiple factors that can affect the accuracy of estimating the project duration in highway construction,such as weather,location,and soil conditions.However,there are other factors that have n...The literature mentions multiple factors that can affect the accuracy of estimating the project duration in highway construction,such as weather,location,and soil conditions.However,there are other factors that have not been explored,yet they can have significant impact on the accuracy of the project time estimate.Recently,TxDOT raised a concern regarding the importance of the proper estimating of the lead/lag times in project schedules.These lead/lag times are often determined based on the engineer’s experience.However,inaccurate estimates of the lead/lag time can result in unrealistic project durations.In order to investigate this claim,the study utilizes four time sensitivity measures(TSM),namely the Criticality Index(CI),Significance Index(SI),Cruciality Index(CRI),and the Schedule Sensitivity Index(SSI)to statistically analyze and draw conclusions regarding the impact of the lead/lag time estimates on the total duration in highway projects.An Excel-based scheduling software was developed with Monte Carlo simulation capabilities to calculate these TSM.The results from this paper show that the variability of some lead/lag times can significantly impact the accuracy of the estimated total project duration.It was concluded that the current practices used for estimating the lead/lag times are insufficient.As such,it is recommended to utilize more robust methods,such as the time sensitivity measures,to accurately estimate the lead/lad times in the projects scheduled.展开更多
At present, our country is developing market economy rapidly, but the economic development cannot be separated from highway construction which is an important component, and highway supervision project also plays a pi...At present, our country is developing market economy rapidly, but the economic development cannot be separated from highway construction which is an important component, and highway supervision project also plays a pivotal role. As China is expanding the scale of highway projects, more and more investment costs are needed for highway projects. The construction site management is very important for highway construction. Only by doing a good job in project supervision can the project quality be further improved. Before the supervision unit supervises the project, it is necessary to establish a sound supervision system and comprehensively carry out the construction site management, so as to avoid construction conflicts. Based on this, this paper focuses on how to do a good job in the construction site management of highway supervision projects in order to contribute a little bit to the construction of highway projects in China.展开更多
With the continuous progress and development of the society, the highway tunnel project in our country has developed rapidly. Looking back on history, the construction of modern highway tunnels appeared as early as 19...With the continuous progress and development of the society, the highway tunnel project in our country has developed rapidly. Looking back on history, the construction of modern highway tunnels appeared as early as 1927 in the Netherlands guilder tunnel at the bottom of the Hudson River in the United States, with a peak hourly traffic volume of 2,000 vehicles. With the gradual improvement of many tunnel construction technologies, multi-function highway tunnels have been built one after another in various countries. By the end of 2000, there were over 400 ultra-long highway tunnels, which greatly improved the transportation efficiency and played an important role in the efficient use of underground space and the protection of the ecological environment. Therefore, it is very important to actively summarize the experience of highway tunnel construction at home and abroad, analyze the problems of modern highway tunnel construction and explore the development direction of modern highway tunnel. Based on the above, this paper will focus on the application of landslide treatment technology in highway tunnel construction, with a view to promoting the healthy development of Chinas highway industry.展开更多
文摘In recent years,China’s society and economy has been developing very rapidly,and various industries are showing a trend of vigorous development.The importance of control and management of project cost in highway project management is becoming more and more prominent.PPP model has been widely used in the control and management of highway project cost with its own unique advantages.The author analyzes the important advantages of the PPP model and the existing problems in the cost control and management of highway projects,and puts forward effective measures for the cost control and management of highway projects using the PPP model,in hope of helping with the smooth implementation of the work.
文摘The"replacement of business tax by VAT reform"(hereby refer to as"VAT reform"for short)is a newly promulgated and implemented tax policy,and its impact on various industries in China is very different,and the highway project industry is no exception.The implementation of the"VAT reform"will not only have a positive impact on the cost of highway projects,but will also have some negative impacts.For this reason,highway project construction corporates must actively respond.The author explores and analyzes the positive and negative effects of the"VAT reform"on the cost of highway projects,and proposes a reform strategy for highway project cost work under the background of the"VAT reform",in hope of helping with bringing out the intrinsic value of highway project cost management work.
文摘Egypt construction projects are associated with different levels of risks. The lack of familiarity of project management standards is one of the common risks in the construction industry in Egypt. The main aim of this paper is to identify the most significant risk factors affecting highway construction project in Egypt to decrease the likelihood and impact of those risks. The research method starts with extensive literature review to provide a prime risk factors list which was also augmented to expertise to reach final risk factor list which contains all risks that may be faced during highway construction. Subsequently, a set of 12 risk groups consisting of 73 risks was selected and a questionnaire survey was conducted to determine the likelihood and consequences of the identified risks. Later, a software application was developed using MATLAB to facilitate risk evaluation of highways projects. Results indicated that the risk factors arise from owner side is one of the most common risk factors in the construction industry in Egypt as the owner in the majority of construction project in Egypt is the governmental sector, however, the overall project risk of highway construction projects in Egypt is considered as at a medium level.
文摘The literature mentions multiple factors that can affect the accuracy of estimating the project duration in highway construction,such as weather,location,and soil conditions.However,there are other factors that have not been explored,yet they can have significant impact on the accuracy of the project time estimate.Recently,TxDOT raised a concern regarding the importance of the proper estimating of the lead/lag times in project schedules.These lead/lag times are often determined based on the engineer’s experience.However,inaccurate estimates of the lead/lag time can result in unrealistic project durations.In order to investigate this claim,the study utilizes four time sensitivity measures(TSM),namely the Criticality Index(CI),Significance Index(SI),Cruciality Index(CRI),and the Schedule Sensitivity Index(SSI)to statistically analyze and draw conclusions regarding the impact of the lead/lag time estimates on the total duration in highway projects.An Excel-based scheduling software was developed with Monte Carlo simulation capabilities to calculate these TSM.The results from this paper show that the variability of some lead/lag times can significantly impact the accuracy of the estimated total project duration.It was concluded that the current practices used for estimating the lead/lag times are insufficient.As such,it is recommended to utilize more robust methods,such as the time sensitivity measures,to accurately estimate the lead/lad times in the projects scheduled.
文摘At present, our country is developing market economy rapidly, but the economic development cannot be separated from highway construction which is an important component, and highway supervision project also plays a pivotal role. As China is expanding the scale of highway projects, more and more investment costs are needed for highway projects. The construction site management is very important for highway construction. Only by doing a good job in project supervision can the project quality be further improved. Before the supervision unit supervises the project, it is necessary to establish a sound supervision system and comprehensively carry out the construction site management, so as to avoid construction conflicts. Based on this, this paper focuses on how to do a good job in the construction site management of highway supervision projects in order to contribute a little bit to the construction of highway projects in China.
文摘With the continuous progress and development of the society, the highway tunnel project in our country has developed rapidly. Looking back on history, the construction of modern highway tunnels appeared as early as 1927 in the Netherlands guilder tunnel at the bottom of the Hudson River in the United States, with a peak hourly traffic volume of 2,000 vehicles. With the gradual improvement of many tunnel construction technologies, multi-function highway tunnels have been built one after another in various countries. By the end of 2000, there were over 400 ultra-long highway tunnels, which greatly improved the transportation efficiency and played an important role in the efficient use of underground space and the protection of the ecological environment. Therefore, it is very important to actively summarize the experience of highway tunnel construction at home and abroad, analyze the problems of modern highway tunnel construction and explore the development direction of modern highway tunnel. Based on the above, this paper will focus on the application of landslide treatment technology in highway tunnel construction, with a view to promoting the healthy development of Chinas highway industry.
