路堑岩质边坡稳定性级别研究

Study of Stability Gradation of Cutting Rock Slopes

路堑岩质边坡具有规模大、数量多、参数获取困难、治理难度大等特点,历来是线路工程中的研究热点.为了解决路堑岩质边坡的稳定评价问题,建立边坡稳定性的模糊综合评价体系,可供同类工程借鉴.根据路堑岩质边坡的特点,以系统全面性、简明科学性、相对独立性及灵活可操作性为原则,选取合理的边坡稳定性评价指标,建立边坡稳定性的模糊综合评价体系,运用层次分析法确定评价指标的权重,建立了路堑岩质边坡的稳定性分级模型.以某国道辅线K57+411～K57+536段边坡为例,运用该模型对其稳定性级别进行了模糊综合评判分级,其结果为不稳定,与规范法的评价结果一致,表明该方法是合理实用的.

Cutting rock slopes have the characteristics including big scale and large quantity,little statistics and lack of detailed rock mechanical parameters;and it is difficult to apply the current evaluation system.So,this paper establishes a reasonable slope stability evaluation index system,which can provide reference to other similar projects.Based on the characteristics of cutting rock slope,considering the systematicness and comprehensiveness,conciseness and scientificity,independence and operability,a reasonable slope stability evaluation index system has been set up;and the stability gradation model for highway rock slopes has been established by using the fuzzy comprehensive evaluation.This model has been applied to 110 Nationalway K57＋411～K57＋536 to analyze the stability of high rock slopes;and the result is unstable,which is consistent with result of standard method.It proves that the method is reasonable and confirm to reality.