Risk Assessment Of Geological Hazards For The Post-Disaster Reconstruction Of S302 Provincial Highway From Renjiaping To Yuli

After the 512 wenchuan Earthquake, most of the original S302 Provincial highway from Renjiaping to yuli road was flooded by the tangjiashan barrier lake,the disruption of traffic has caused great inconvenience to disaster relief and the lives and the production of the people in disaster areas. Therefore, Mianyang City Department of Transportation decided to rebuild this section of Highway.However, the work area just withstood earthquake disaster,what's worse,the poor natural geological conditions and the frequent occurrence and intensive distribution of geological hazards also has brought great difficulties to the redevelopment.This article's research object is the geological disasters along the road. Based on a comprehensive grasp of the natural geological environmental conditions, article find the factors which mainly effect the stability of geological disasters through researching and analysising the development features and formation mechanism of each type of disaster. and based on it,article made a risk assessment for the numerous of geological disasters along the road. The main research contents and results are as follows:(1)Based on the field investigation and geological data analysis, article expounds the natural geological environmental conditions of work area natural geological environmental conditions, and find that the main three types of geological disaster of the work area is landslide, debris flow and. Collapses.(2)Researched the development features of the three kinds of geological disasters in work area and analyzed its formation mechanism.(3)Assessed the risk of each geological hazard of work area with FuZZy synthetie evaluation which based on Analytie Hierarehy Proeess, and got a reliable results(4)Assessed the risk of geological hazard of each section of work area with Gray clustering analysis,and got a real reliable results.(5) According to comparising and analysising the indoor evaluation results and the field on-site evaluation results, constructed and comprehensived a more complete single geological hazard evaluation system and Sections geological hazard evaluation system in work area.The evaluation system provided a reliable basis for the right deal to geological hazards threat in the reconstruction along the work areas, meanwhile, the evaluation system also provided a reference for the geological hazard assessment in similar regions.