开挖边坡随机楔体稳定分析与加锚优化方法

3-D random wedge stability analysis and anchorage optimization in rock slope

随机楔体的破坏是岩石开挖边坡中常见的破坏类型之一。在对组成楔体的结构面调查统计的基础上 ,应用随机模拟的方法 ,生成开挖边坡的三维裂隙网络。进一步运用随机搜索方法与块体理论 ,搜索出边坡面上的随机楔体 ,进行楔体的稳定分析。采用风险设计的理论 ,建立系统锚杆的优化设计方法。将研究结果应用于小湾水电站进水口开挖边坡的稳定分析与锚固优化设计中 。

Random wedge failure is one of the common failure types of rock slope excavation. Based on the investigation of the joints of rock slope, the statistical data of joint dip direction,dip angle,trace length and spacing were obtained; furthermore, using Monte-Carlo simulation method formed the 3-D joint network. It can be found the random wedges in slope surface by using block theory and random search method. For the instable slope, the method of anchorage optimizing design was built by using risk analysis theory. Finally, the research achievements were used in the slope of water entrance at Xiaowan Water Power Station, and the result was reliable.