结合相关行业规范，考虑工程重要性、稳定性的基础上，选取危险源自身、途径边坡、触发因素3个一级指标，选取危险源稳定性、势能、形状、途径边坡形态、坡度、植被发育情况、地震、降雨等9个二级指标和35个基础指标，建立指标齐全、易于操作的环境边坡危险源危险度评价体系，实现危险度评价的定量化，并按评分值大小将危险度分为高、中等、低3个等级。以卜寺沟水电站地面厂房环境边坡危险源评价为例，现场调查得出地面厂房环境边坡共有危险源12处，评价得出高危险度3处，中等危险度9处。评价结果符合实际，表明该评价体系能较准确评价危险源危险度，能为其防治提供依据和指导。%On the basis of combining with the relevant industry standards and considering the factors of engineering importance and hazards′ stability,hazard rating assessment system(HRAS) of surrounding slope, which has enough easily valued indicators,is established according to 3 first level indices (the hazard source,path and inducing factors);9 secondary indices(stability,potential energy,hazard sources shape,paths geometric features,vegetation growth,earthquake and rainfall) and 35 basic indices. According to the level of values , hazards rating is divided into 3 levels-high,medium,low level. Taking the surrounding slope of ground powerhouse as an example,there are 12 hazard sources of 3 high hazard rating and 9 medium. The result is largely correspondence to reality. and the system can correctly evaluate the risk degree and make guidance for dangerous source prevention and controlling.
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