摘要
结合锦屏高边坡三维非线性有限元仿真分析,对高边坡整体稳定分析的极限平衡计算方法进行了研讨。提出并采用多重网格的概念和方法,将有限元的应力成果转移到任一滑面(平面或曲面)上,进而分析滑面的稳定状态,包括滑面的应力、屈服区与剪应力的分布及变化过程,并可求出类似刚体极限平衡法的滑面安全系数和滑块体安全系数,进而对块体变形直至失稳的全过程进行了全面深入的探讨。
Based on 3D nonlinear FEM analysis of Jinping high slope, the rigid limit equilibrium method in the stability analysis of high slope is discussed. The first stage hydropower station of Jinping locates between in Yanyuan county and Muli county in Sichuan province. It is an important cascade hydropower station in Yalong River. The high slopes of both left and fight banks of Jinping Hydropower Station are on large scales, and the geology is complicated too. The excavated slopes of this project include the excavated slope of spandrel groove and cable machine platform. The concept and method of multiply mesh are put forward, and the stress result of FEM is tranferred to any sliding surface（plane or surface）. In this way, the stability state of sliding surfaces can be analyzed. The stress distribution on sliding surfaces of sliding blocks is computed, including the safety factor of the sliding surfaces and blocks at each load step, yield area, normal strength and shear strength of sliding surfaces during overloading. Based on the results, the process of sliding blocks＇ failure due to deformation is discussed systemically. This findings can provide a more profound cognition on limit equilibrium analysis for stability analysis of high slope in practical engineering.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第A02期5313-5318,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50279016)
国家重点基础研究发展规划(973)项目(2002CB412708)
关键词
边坡工程
刚体极限平衡法
块体
滑动面
slope engineering： rigid limit equilibrium method
blocks
sliding surfaces
