Research On Key Technology Of The Enlargement And Alteration In The Trumpet Interchange

Connectivity and vehicle conversion in the roads, interchange has become a gateway in the Road Traffic and been an integral part of the freeway. At present, the enlargement of china freeway is in a large-scale period. There will be lots of projects about the enlargement and alteration of interchange in the future. It is more difficult because our country hasn't had an independent and complete design specification about interchange. Many projects still have irrationality after enlargement or alteration. So, the technologies of enlargement and alteration in the freeway interchange are necessary and pressing.This article carries on from following three aspects:scheme, linear design and traffic organization. First, in this paper many established projects are summarized and analyzed, get a result of scheme. The scheme is divided into rebuild, expansion and modification. It has studied advantages, disadvantages and scope of application in great detail. Besides, this article has analyzed scheme for enlargement and alteration of trumpet type which kind of interchange is used in our country freeway. According to the way of enlargement in principal line. Second put forward how to design linear by means of analyze adaptability of original project. It should be content with standard and maximum use original project. Third, via practical survey, analyze traffic character and factor of safety in construction area. Direct at enlargement and alteration of trumpet interchange, raise specific traffic organization scheme and implementation strategy. Through analyze safety management of operation area, point out that the important factor which influence construction and traffic is amount and proportion of oversize vehicle. It is important to control trip of oversize vehicle. At last, in line with the project case, carry on the concrete elaboration to the key technology of enlargement and alteration of project.