Study On Highway Reconstruction And Extension Scheme In Xinjiang Desert Area Of Gobi

In recent years,with the rapid development of economy,the load and the number of large vehicles are constantly increasing,the highway traffic volume and traffic load has been increasing,the gap between the traffic demand of the original design capacity and growing more and more big,the service level of the peak period has been significantly reduced,the highway traffic jams have occurred when that road service level decreased significantly,greatly affected the road traffic,resulting in the increase in transportation costs,to some extent hindered the growth of regional economy.Therefore,it is necessary to change the original highway to increase the number of lanes and improve its capacity to meet the normal and safe use of the expressway.In view of the complexity of the expansion project has the particularity,it is necessary to conduct in-depth study on the expansion of the original highway route,roadbed,bridge and culvert crossing engineering etc.at the same time,and learn from the lessons of developed areas in highway reconstruction party experience and problems in the process of case study.In this paper,based on the Kuche to Akesu expressway reconstruction and expansion project,the route scheme of expressway reconstruction is studied.This paper through field survey in Xinjiang desert area of Gobi’s natural environment,climatic conditions,geological conditions,as well as on the original road G314 highway subgrade pavement,subgrade and pavement drainage,bridge culvert usage,interchange and the use of the road traffic and traffic volume prediction analysis found,the original road has been unable to meet the current needs of normal traffic,so we must carry on the expansion.Through the demonstration of couas expressway route plan,route,subgrade and pavement engineering to overpass the necessity of expanding;studied the pavement reconstruction scheme from pavement design principles,layout and cross section of subgrade and pavement structure and super high way and the thickness of subgrade and pavement drainage and other aspects;expounds the bridge culvert expansion principle,put forward the reconstruction for large bridge and culvert;expounds the route extension interchange design principles,different modification methods and application conditions were analyzed through the analysis of interchange,Interchange Interchange traffic volume forecast results to determine the expansion ramp lanes,the extension of Road Interchange reconstruction plan.