岩土工程边坡破坏模式探讨及多块体组合“刚体极限平衡法”稳定分析案例  

Discussion on failure mode of geotechnical engineering slope and "Rigid body limit equilibrium method" stability analysis case of multi-block combination

作　　者：李锋[1] 郭立红 雷艳[1] LI Feng;GUO Lihong;LEI Yan(PowerChina Northwest Engineering Corporation Limited,Xi'an710065,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司

出　　处：《西北水电》2019年第5期29-33,38,共6页Northwest Hydropower

摘　　要：随着中国筑坝技术的不断发展,高度大于200m的超高土石坝(或拱坝)相继建成或处于前期规划阶段。高坝泄洪消能及雾化问题十分突出,尤其对窄深峡谷岸坡的稳定可能产生极大危害,甚至影响水电站的安全运行,且工程治理规模及投资往往较大。通过对岩土工程边坡破坏模式的探讨,并结合某工程案例对复杂岩质边坡在考虑侧向约束作用下,采用多块体“刚体极限平衡法”进行稳定分析,可减小工程治理规模和投资,取得了明显效益。With the continuous development of dam construction technology in China,ultra-high earth-rock dams(or arch dams)with a height of more than 200 m have been built or are in planning.Flood discharge energy dissipation and atomization is a prominent problem for high dams,especially for the stability of narrow and deep canyon slopes,which may even affect the safe operation of hydropower stations,and the scale and investment of engineering treatment works is usually large.Through the discussion of the failure mode of geotechnical engineering slopes,combined with a project case,the multi-block"rigid body limit equilibrium method"is adopted for stability analysis of complex rock slopes with considering of lateral restraint,which can reduce engineering treatment scale and investment,achieving significant benefits.

关 键 词：失稳模式 刚体极限平衡法 稳定分析 坡体结构特征 侧向约束 

分 类 号：TU452[建筑科学—岩土工程]