昌马水库右岸山体稳定性研究

昌马水库导流排砂洞塌方导致右岸山体发生松动 ,本文在大量地质资料的基础上 ,对右岸岩体裂隙网络进行模拟 ,同时 ,采用极限分析能量法和有限元数值模拟方法等对右岸山体的稳定性进行分析研究 ,并提出相应的加固方案。

Stability of the right abutment slope of Changma Reservoir

The collapse of the sluice/flood discharge tunnel leads to the unstable problem of the right abutment slop. In this paper, the authors simulate the joint network of the rock mass, analyze the stability of the right abutment slop by the EMU method and finite element method, and put forward the reinforcement program for the right abutment slop.The result of in-situ survey and statistic for the structure plane of rock mass shows that a group of joints is found along the right abutment slope, but the number of joints is little and the continuity is poor. So the possibility of the sliding failure is little for the right abutment slope. The result of the FEM analysis shows that the shear and tensile failure field distribute mainly in the superficial part of slope and along both sides of the collapse body. The maximum displacement is found at the slope foot, near the shaft platform at El. 2001m, this part of the slope is important and should be reinforced.The result of the calculation about the stability of the slope shows that topple is the main failure model of the slope and the factor of the stability is 0.974. According to the project conditions, groundwater drainage and consolidation grouting are suggested as the reinforcement program for the slope. The calculation result shows that consolidation grouting improve the strength of the collapse body, control the deformation of the rock mass, and heighten the stability of the right abutment slope.