地质灾害危险性评估在高速公路工程中的应用

Application of risk assessment of geo-hazards in highway engineering

以湖南省益阳至马迹塘高速公路工程地质灾害危险性评估为例,对公路工程地质灾害危险性评估的方法和主要技术问题进行探讨.结合该工程建设特点,首先介绍了以切坡引发或遭受滑坡为主的地质灾害危险性评估方法,提出了滑坡危险性评价指标体系,列出了滑坡的主要影响因素及其权重系数,建立了专家评分模型;其次对区域内地质灾害危险性分区进行了评价,分为危险性大区、中等区和小区,并对地质灾害防治区进行分级,分为重点防治区、次重点防治区和一般防治区;最后针对不同级别的防治区,分别提出了工程措施、生物措施和监测措施方案.

Taking the geological hazard assessment of the highway engineering between Yiyang and Majitang in Hunan Province as a case,we discussed the methods and key technical problems of geo-hazard assessment in highway engineering.Considering the characteristics of the engineering construction,firstly,we introduced the methods of hazard assessment of geo-hazard in highway engineering caused by cut-slope or suffered slope,presented the index system of hazards assessment of slope,listed the main influenced factors and their weight coefficients on the slope,and established the experts evaluation model.Secondly,the geo hazards risk assessments in the research area are divided into high risk,moderate risk and slight risk,and the prevention and control of geological disaster areas are graded into major prevention area,second-emphasis prevention area and general prevention area.Finally,the prevention measures for different levels of prevention areas are presented,including engineering measures,biology measures and monitor measures.