公路路基地质灾害危险性综合评价方法研究

Study on Comprehensive Evaluation Method of the Risk of Highway Subgrade Geological Hazards

以对公路路基威胁最大的滑坡灾害为研究对象,从自然因素和公路建设的人为活动两方面入手,研究了灾害产生的原因和机理;选择滑坡发育阶段、滑坡规模、降雨、河流冲刷、地下水等自然因子和人类活动作为滑坡危险性的主要评价因子,提出了评价因子影响程度分级标准;以层次分析法和综合指标法为主要研究手段,建立了滑坡危险性评价模型,并以G316线陕西安康段三处公路滑坡为依托工程,对评价模型进行了验证,评价结果与实际情况一致。

Based on landslide disaster,the most harmful geological hazard for highway subgrade as the research object,from natural factor and human activities of highway construction,the causes and mechanism of landslide are studied in this paper.Landslide development stage,landslide size,rainfall,water scouring and underground water etc are selected as the main evaluation factors for the risk of landslide to put forward the classification standard of the influencing degree of these factors.Landslide risk evaluation model is established based on analytic hierarchy process and comprehensive index method.In addition,taking three landslide sections in Shanxi-Ankang Section of G316 Line for example,this paper verifies the evaluation model in conformity with the actual situation.