Research Of The Technology On Upgrading And Reforming Low-grade Highway In Mountains Area

China’s highway network construction has begun to take shape, but still far from the level of developed countries in recent years, China has entered a period of large-scale renovation and expansion of the road, in terms of renovation and expansion of high-grade road accumulated some experience, but at lower levels Highway expansion aspect inexperienced and less for research in this area, mainly in the process of upgrading to the new main road utilization rate of the existing resources, resulting in a waste of resources. To solve these problems, the paper mountain upgrading technology to study low-grade highway in order to provide a reference for other similar projects.This paper analyzes the natural geographical, cultural and economic characteristics of the mountain, and then analyzes the characteristics of mountain low-grade highways, for these characteristics, the reasons put forward mountain road upgrading of low-grade form of upgrading and the upgrading of the applicable technical standards, proposed upgrading The basic principles and then rely on the provincial highway S205 Guizhou Fuquan rise from Gaolou to Longshan segment upgrade project, in full consideration of the factors in the route through which the road network planning, road situation, town planning, local economic conditions, natural conditions, land resources under on the highway route design, route selection scheme than upgrading methods, roadbed, road, bridge, culvert summarizes research and systems. Finally, according to "Highway Engineering Technical Standards" implemented since 2015(JTG B01-2014) required to run checks with the relevant provisions, according to the highway construction in terms of traffic safety research results, the use of appropriate low-level road running speed predictive model to calculate the running speed of each segment of the route, according to the speed of the calculated, using appropriate evaluation criteria for the recommended route relying on engineering programs were running speed and running speed coordination assessment and evaluation of the consistency of the design speed, find the local route design inadequate for the problem, propose amendments to improve the original design.In this paper, Fuquan, Guizhou Province S205 rise from Gaolou to Longshan section of the project to upgrade the technology and methods of low-grade highway were studied for the upgrading of low-grade roads to provide an idea by relying on the project, the largest of the original road resources extent of use, the design is complete, using the method of evaluating the operating speed of the route were evaluated for the design of improved road unreasonable to ensure road safety. Both to reduce the project cost, but also make rational use of resources.