金川水电站导流洞进口边坡开挖锚固措施优化分析  

Optimization Analysis of Anchoring Measures of Diversion Tunnel Inlet Slope Excavation for Jinchuan Hydropower Station

作　　者：周时[1] 黄宜胜[1] 徐光耀 罗骞[1] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]武汉市测绘研究院,湖北武汉430000

出　　处：《水电能源科学》2013年第12期147-150,共4页Water Resources and Power

基　　金：湖北省教育厅科学技术研究计划优秀中青年人才基金资助项目(Q20111203);湖北省宜昌市科学技术研究与开发基金资助项目(A2012-302-01);三峡大学硕士学位论文培优基金资助项目(2013PY003)

摘　　要：金川水电站导流洞进口边坡开挖过程较为复杂,坡体开挖部分岩性较差且有多组结构面发育,部分区域为强风化强卸荷岩体,为保障边坡安全稳定、节约边坡治理成本需合理优化锚固措施。为此,结合极限平衡法、二维和三维有限元法,从位移、应力、塑性区和稳定性多角度对初拟锚固方案的支护方式、锁口锚索与锚筋桩的设置、预应力锚索数量进行优化分析。结果表明,初拟方案下开挖边坡的各项安全指标均在合理范围内,其锚固措施是可行有效的。The diversion tunnel inlet slope of Jinchuan Hydropower Station has a complex excavation condition. ＂Fhere are groups of structural planes in the excavating rock mass which has poor lithology and partial region is strong weathe- ring and unloading rock mass. Reasonable optimized anchoring measures have important significance to ensure the slope stability and cost saving for treating slope. In this article, combination of limit equilibrium method, two-dimensional and three-dimensional finite element method is used to optimize support pattern, setting of lock anchor cable and anchor bars, pre-stressed anchor cable quantity from the aspects of displacement, stress, plastic zone and stability. The results show the safety indexes of excavated slope with preliminary scheme are in a reasonable range and the anchoring measures are feasible and effective.

关 键 词：边坡 开挖 锚固 二维有限元法 三维有限元法 极限平衡法 

分 类 号：TV554.13[水利工程—水利水电工程] TU457[建筑科学—岩土工程]