Study On Risk Assessment Of Geological Hazard In Bizhi Railway

In this paper,taking the geological hazards of Bijie-Zhijin Railway as the research object,the comprehensive index evaluation method based on AHP is used to study the hazard assessment of the disaster sites along the railway line.The fuzzy comprehensive evaluation method is used to study the risk zoning of geological hazards along the route,and the evaluation of the severity of various geological hazards,the evaluation of railway hazards,and the risk zoning of geological hazards are obtained.Combined with the regional geological environment along the railway line and the hazard assessment of the disaster,the rock fall of the bedrock along the railway line is classified,and the preliminary prevention and control suggestions for the corresponding work site are put forward.The main findings are as follows:1.Based on field investigation and existing geological data,the types,quantity,scale,influencing factors and developmental characteristics of geological disasters along the railway are summarized.2.By using the analytic hierarchy process(AHP)and the comprehensive index evaluation method,the corresponding evaluation index system for various types of geological disasters along the railway line is established.Evaluation of the severity of geological hazards and the evaluation of the harmfulness of geological hazards to railways at each geological hazard site along the railway line.3.According to the actual investigation of geological hazard development in Beizhi railway,the safety risk of disaster site is evaluated qualitatively.The fuzzy comprehensive evaluation method is used to evaluate the geological conditions of the section,and the geological hazards of the railway are divided into dangerous areas.4.According to the engineering geological conditions,the development state of geological hazards and the risk assessment,the rock fall along the railway is classified,and the simulation analysis is carried out by using Rockfall software.5.Referring to many literatures,combined with the present situation of the development of disaster sites,the preliminary prevention and control suggestions for each site are put forward.