Study On Risk Assessment And Regionalization Of Highway Geo-hazards

Geo-hazard is one of the most common natural hazard, which with high frequency, largesize and heavy losses. As the artificial buildings in nature, when the geo-hazard occurs,highway will be affected, leading to highway geo-hazard. According to highway departmentstatistics, highway geo-hazard losses are more than several billion Yuan in our country everyyear.Therefore, the risk assessment and regionalization of highway geo-hazard, grasp the riskdegree of space distribution features, provide guidance for the planning, design, constructionand operation of highway management, it has the vital significance of highway hazardprevention and migigation.Various geo-hazards can influence highway, which seriously threat the implementation ofthe role of "lifeline". Based on the research of highway construction environment, this paperaims to abtain the hazard assessment of highway geological hazard and regionalization, to acertain extent, provide a reference for highway geological hazard prevention.1) Through the research of occurrence frequency and the extent of damage of variousgeological hazards, choosing landslide, collapse, debris flow and earthquake hazards forhighway geological hazard hazard assessment and regionalization research; After the researchof fuzzy comprehensive evaluation method, chromatography analysis method and influencefactors superposition method, choose factors superposition method for hazard assessment.2) Based on the identification of influence factors of highway landslide (collapse) hazard,highway debris flow hazards and the earthquake hazards, choosing highway geological hazardhazard assessment indicators, and each index can be divided into5levels, respectively, score1,3,5,7,9; using expert scoring method to clear index weight value of the highway landslide(collapse) hazard and highway debris flow hazard; according to the evaluation model, overlaythe basic datum, get the “China highway landslide (collapse) hazard map","China highwaydebris flow hazard map", vector the “quantization ground motion peak acceleration partitionmap of China”, to generate " China highway earthquake hazard map ".3) Highway landslide (collapse) hazard and debris flow hazard are considered in thehighway geological hazard hazard assessment,which using factors superposition method,determine the weights of evaluation indexes by expert scoring method, using ArcGIS10.0forhighway landslide(collapse) in China hazard map" and "China highway landslide hazard mapoverlay analysis, get the highway geological hazard map of China, and in accordance with thehighway geological hazard risk, hazards are divided into no danger, less danger, danger andvery danger. 4) According to the geological hazard risk,China is divided into four grades and12highway geological hazard area, namely, the micro-hazard areas, mid-hazard areas, high-hazardareas and very high-hazard areas, using ArcGIS10.0software to form comprehensive highwaygeological hazard risk zoning map of China, and give instructions for each area.