受断层切割影响的拱坝坝肩岩体三维稳定性数值分析及加固措施模拟  

NUMERICAL ANALYSIS OF STABILITY FOR ROCK MASS IN ARCH DAM ABUTMENT IMPACTED BY FAULT AND SIMULATION OF FAULT TREATMENT

作　　者：江涛[1] 徐卫亚[1] 陈宏[2] 吕军[2] 

机构地区：[1]河海大学岩土工程研究所,江苏南京210098 [2]国家电力公司贵阳勘测设计研究院,贵州贵阳550002

出　　处：《岩石力学与工程学报》2005年第A02期5840-5844,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(50128908);国家重点基础研究发展规划(973)项目(2002CB412707)

摘　　要：某水电站右岸坝肩岩体受断层切割,稳定性较差,成为工程安全的一大控制性因素。为研究其稳定性,对受断层切割的拱坝坝肩岩体进行了拱坝和坝肩岩体联合作用的三维非线性数值模拟。模型用点安全系数法和超水荷载法,研究坝肩岩体的稳定性,并对起控制性作用的断层进行了加固模拟,分析了加固措施对坝肩岩体安全的影响。研究结果表明:对断层采取工程加固措施后,稳定性有了明显提高,为工程建设提供了有意义的参考。Rock mass of arch dam abutment in a hydropower station is incised by a key fault. So the abutment is possibly instable under the combined action of huge water pressure and the disadvantageous geologic setting, and it is a key factor to control the safety of the whole project. In order to study the stability, a nonlinear 3D numerical simulation is conducted for rock mass in arch dam abutment incised by fault. Stability is studied by point safety factor method and overload method. Enhancement on key fault is simulated, and the influence on the stability of rock mass in abutment is analyzed. The results show the stability is increased evidently after fault enhancement, and thus it can orovide reference to engineedng oractice.

关 键 词：岩石力学 坝肩岩体 点安全系数法 超载法 断层加固 

分 类 号：TU452[建筑科学—岩土工程]