Study On The Design Key Problems Of The First Class Highway Of Jingchang To Yongchang

In recent years,The rapid development of road traffic in China,and constantly promote China's economy,so that people's living standards have been improved.Therefore,Nowadays road construction is an indispensable condition for the prosperity and development of the country.With the continuous increase in traffic volume,some of the early construction of highway traffic is close to saturation,a considerable part of the road needs to be expanded.If it can not meet the traffic situation,new roads is needed..The Jinchang(four points)to Yongchang Expressway Reconstruction and New Project exists technical problems,such as Route selection of special areas in Gobi,salty soil,collapsed loess,Prevention Measures of Greening in Desert Road Section,highway landscape design.This paper focuses on the following key issues:1)The influence of natural,geographical,cultural environment and urban planning on project design.Firstly,according to the landform,climate and hydrology survey in the course of the route,and combining with the characteristics of the rock along the road,the author puts the unfavorable geological evaluation along the route to ensure that the circuit design is not affected by geological disasters.2)the study area of land route and key line selection scheme,in the premise of rational use of various control parameters,the overall design scheme selection and route of the key section of the line,to determine a reasonable circuit design scheme,feasibility of engineering technology,and strive for economic.3)for all types of problems at present level of highway subgrade and pavement structure in the process of operation appears,combined with the natural climatic conditions and local geological conditions,pavement structure design in various forms,advantages and disadvantages of different schemes are compared,choose the most suitable for the typical pavement structure,and put forward the different pavement structure available the different areas of the line,bridge etc..4)influence on the project location and the natural environment and the humanities environment of the project,the research route through the natural geological disaster section,classification summary of various geological disasters on the impact of the project,to complete the design of the line after the less influence by geological disasters,how to build a harmonious ecological highway and highway the desert drought research in highway construction operation and the degradation of ecological environment in Hexi Corridor in Gobi area and less rain,wind,large temperature and other extreme natural conditions,special sections of the prevention and disposal of saline soil and landscape design under the conditions of maintaining highway construction and ecological balance.5)because of cross regional and urban acts more routes and other routes,the different sections of the line crossing design should conduct in-depth research for scheme comparison and selection,a comprehensive analysis of its advantages and disadvantages,select the optimal scheme.The project was approved by the Gansu provincial development and Reform Commission to adjust the delivery [2015] document No.1302.In this paper,the treatment of saline soil,collapsible loess treatment,environmental protection and landscape design in the route design of Gobi area were studied.Based on the investigation on the present research,the Jinchang(four points)to Yongchang section of highway construction to conduct a comprehensive investigation and analysis,research,culture,climate,geology along the highway network planning,the paper proposes the design ideas,and the route design,subgrade and pavement,bridge,road intersection scheme saline soil,collapsible loess,Gobi landscape design detailed comparison,through research and comparison of economic indicators,technology,recommended construction plan.For Jinchang(four points)to the Yongchang section of highway construction has accumulated data,the highway construction is of great significance.