含不利组合结构面的高边坡开挖稳定性分析  

Analysis on Excavation Stability of High Slope with Unfavorable Combination of Structural Planes

作　　者：党莉[1] 刘军[2] 刘海飞 卢鹏[4] 陈星[1] 

机构地区：[1]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002 [2]二滩水电开发有限责任公司,四川成都610021 [3]中国葛洲坝集团第二工程有限公司,湖北宜昌443002 [4]南方电网天生桥水力发电总厂,贵州兴义562400

出　　处：《水力发电》2011年第4期35-38,共4页Water Power

基　　金：国家自然科学基金(50909052);湖北省自然科学基金计划项目(2008CDB366);三峡大学硕士学位论文培优基金资助项目(2010PY018)

摘　　要：分别运用有限差分法对边坡整体和块体极限平衡法对边坡局部进行稳定性评价。结果表明，局部的小断层对该边坡的整体稳定没有构成较大威胁，但部分含有断层的区域应该给予重点关注；边坡开挖后整体的位移和拉应力区域较小，应根据需要进行加固；在430—460m高程开挖施工过程中，形成的开挖剖面可能与两组结构面组成不稳定块体，故应重视开挖方向和顺序；开挖完成后两组结构面距离下游开挖面较远，组成不稳定块体的可能性不大．但施工中应做好排水措施。The overall and local stabilities of slope are analyzed by finite difference method and block limit equilibrium tbeory respectively for a hydropower project. The results show that： （i） Local small faults do not pose a greater threat to the overall stability of slope, but some of areas which containing faults should be focused; （ii） The areas of displacement and tensile stress after excavation are smaller and should be reinforced as needed; （iii） In the excavation of the area between El. 430-460 m, the excavation profile may be composed unstable blocks with two sets of structural planes, so the direction and sequence of excavation should be paid attention to; and, （iv） Because two sets of structural planes after excavation are far away from the downstream excavation surface, it is unlikely to form a unstable block, but the drainage should be assured.

关 键 词：边坡 稳定性分析 有限差分法 块体极限平衡理论 

分 类 号：TU457[建筑科学—岩土工程]