Research On Traffic Safety Analysis Of Long And Steep Downgrade Sections And Environment Protection In Lichang Expressway

QingLan expressway(G22)of Li Cheng to changzhi is the national expressway network planning in the transverse 6 at the starting point of the paragraph,in Shanxi Province is also adjusted the expressways in Shanxi Province(February 2009)"three horizontal,vertical and 12 、12 ring" in the 9 cross sections.Together with the other road,constitute a,east to the north-south,skeleton expressway network layout is reasonable,for the regional national economy,nice and fast development play a positive role in promoting and pushing.But since the original linear index is low,the sections of the road there grew up longitudinal slope,since for truck brake failure frequent accidents.Therefore,make necessary adjustment to the line is very urgent.Paper first in this article are based on the project background and detailed project environment protection countermeasures,then grew up in a fully analysis at home and abroad about longitudinal grade brake drum temperature rise on the basis of research achievements at present,the commonly used truck brake and its thermal recession and the cause of the failure to introduce more detailed.According to the code for the safety evaluation of highway project proposed by the design phase of evaluation content,combined with the QingLan expressway(G22)Li Cheng to changzhi section of actual project,from the operation safety,the analysis of grew up downhill vehicle braking performance,the chang ’an university "grew up downhill road safety evaluation of highway and improve the countermeasure research,is the brake hub,the temperature prediction model for different load conditions under the condition of different running speed of the main brake temperature.Through to the starting point to dongyang grew up with Zhuo ZhangHe to NiuWang paragraphs longitudinal slope before and after the improvement of safety inspection,combination with the engineering practice,aiming at improving after may also appear safe hidden trouble,put forward the feasible traffic safety technology and management measures,to improve the level of QingLan expressway traffic safety has important significance.