The Prevention And Cause Of Geological Disasters In The Section Of Pinwu-Wenxian,Mianyang-Jiuzhaigou Highway

With the rapid development of the community economy, the highway plays anincreasingly important role. Landslides, avalanches and other geological disasters along themountain road constitute a huge threat to traffic travel safety, life and property safety, so thehighway geological disasters has become a focus of geological phenomena in recent years.During highway route, it should be a preliminary to understand the the geological hazards ofthe line along in order to determine the rationality of the road location. In order to avoiddisasters of geological exploration for the construction of roads and along the roads, It isnecessary to clear the main factors of geological disasters. Analysis of geological disasters inthe causes and geological disasters in the effective evaluation for the prevention of geologicaldisasters has an important scientific value and the value of engineering applications.The proposed highway from PingWu to WenXian segment is an important channelbetween Sichuan and Gansu provinces, is also a high high-grade highways leading to theJiuzhaigou scenic spot. This road section, located in middle and high mountain areas of thesouthern Qinling mountains, has complicated terrain, more variable lithofacies and lithologiccharacter, complicated engineering geological conditions and active seismic activity, however,the human engineering activity, which destroies the environment is less. Generally, the studyarea is in the crustal uplift condition for a long time. Since Neogene, the mountain area of thewestern Qinling generally presents a constant uplift process, and the neotectonic movement isintense. Moreover, incessant erosion action formed deeply mountains and gullies, which arerelatively dense. The first and the second terraces is found in valleys of Baimayu river andBaishui river. Terraces, with a width of10-200m, has a surface composed of sand, underlyingstrata composed of sand gravel and gravel. Dual structure of the terraces is obvious. Amongthem, the relative height difference of the first and the third terrace is5-50m.The regional geological hazard evaluation is an effective way of international advocacyand promotion of disaster reduction and prevention of geological disasters, and it has becomeone of the hotspots in recent years. The Breeding and occurrence of geological hazards are affected by natural factors and human factors, and there is a More complex relationshipbetween the geological disaster and its causes. The traditional quantitative evaluation of singlefactors directly affect the accuracy and reliability of the evaluation results, so it limits thepromotion and application of geological hazard analysis.Combined with field visits, the basis of field geological background and the type, sizeand features of geological disasters were described in this paper, and various factors influencethe formation of geological disasters were clearly pointed out., at last Geological hazardassessment system for the study area was created. In this paper the forecast evaluation usingfuzzy comprehensive evaluation method to geological disasters in the study area was detailedanalysis, and prevention of geological disasters comments and suggestions were proposed.