| In recent years,with the rapid economic and social development of our country,the traffic volume and traffic load of road traffic have increased day by day.With its many advantages in highway construction,cement concrete pavement is used in a large proportion in our country.However,the ever-increasing service life,due to extreme weather,humidity and geological conditions,has made various diseases such as cracking,crushing,plate corner fracture and voiding more frequent,which seriously affects the safety of road vehicles and restricts It serves as the traffic service capacity of the main urban road.Therefore,the future "white to black"project based on cement concrete pavement will inevitably gradually become the trend of urban road reconstruction,which has important practical significance for minimizing investment and maximizing benefits during the life cycle of urban roads.This paper takes the technical scheme of "white to black" cement concrete pavement as the research object,and carries out research on the "white to black" of existing cement concrete pavement through a combination of quantitative analysis and qualitative analysis,and proposes a new technical scheme evaluation The method is to introduce the theory of full life cycle cost and technical economic analysis into the "white to black" technical plan evaluation system,which provides theoretical support for later selection of the optimal technical plan.The core idea of the life cycle cost theory is to emphasize that the cost of single product development and production is not enough to judge the total cost of the product.Decision makers should combine production costs and operation and maintenance costs,and consider the overall cost.This article conduct detailed research from the following aspects:(1)Analyzed the background and significance of the thesis research,based on the current background of rapid development in my country,introduced the theory of life cycle cost analysis into the project’s technical and economic analysis system,so as to achieve the maximum economic benefits of the project with limited resources,On this basis,introduced the theory of life cycle evaluation,including its concepts,characteristics and standards for economic evaluation,and discussed the necessity of life cycle cost management,laying a theoretical foundation for project research.(2)The technical plan and technical economy of the "white to black" cement concrete pavement are analyzed.Introduced the natural environment and highway status of the case study in this article,analyzed the design of three common domestic "white to black" technical schemes,including the characteristics of each scheme,construction requirements,matters needing attention,and three technologies The schemes were compared and analyzed,the similarities and differences of the implementation methods and processes of the schemes were explained,the advantages and disadvantages of the three were compared,and the scope of application was defined.(3)Taking the cement concrete pavement "white to black" project of Shuanggang Avenue in the Economic and Technological Development Zone of Nanchang City as an example,the three types of the current mature direct overlay technology solution,impact rolling technology solution and petrochemical technology solution were selected.Technical solutions,comparative analysis of the advantages and applicability of each technical solution.Through the life cycle theory,the life cycle cost of each technical scheme is obtained,and then the feasibility analysis,rationality analysis and social impact analysis of the above three technical schemes are performed using the technical economic analysis theory.Finally,the optimal scheme is obtained by comprehensive comparison.Through research and demonstration,this paper introduces the whole life cycle theory and technical and economic analysis theory in the evaluation system of the "white to black" technical plan to provide a theoretical basis for the selection process of the "white to black" technical plan,and at the same time,it can realize road engineering construction.The purpose of reducing costs and increasing efficiency. |
