黄河小浪底水库风雨沟西侧边坡稳定性研究

运用结构分析法、关键块体分析法和工程地质类比法定性评价边坡稳定性,抽取边坡岩体破坏模式。根据自制简易纵剖面仪现场绘制了结构面表面轮廓曲线,运用修正直边法和JRC—JCS模型定向统计估算结构面抗剪强度。通过对比验证定向统计估算结果与试验结果,确定计算参数取值标准。在以上两方面研究的基础上,建立边坡极限平衡计算模型,进行边坡破坏概率计算。最后,对边坡稳定性进行了综合评价。

EVALUATION ON SIDE SLOPE STABILITY OF FENGYUGOU , XIAOLANGDI RESERVOIR

The paper makes a preliminary evaluation on the side slope stability and draws out its failure patterns by using structural analysis , key block theory and engineering geological comparison method .Then , it studies the surface profile curve of discontinuity completed by the simple profile instrument , and statistically evaluates shear strength parameters of some oriented discontinuity by using the modified straight edge method and JRC-JCS model , Comparing the shear strength parameters from evaluation above with that from tests , we determine the calculating parameters .Based on above two , calculating models of the side slope are established , and the failure probability is evaluated .At last , a comprehensive stability evaluation of the slope is made .