岩质高边坡开挖及支护条件下稳定性数值模拟  

Numerical Simulation of High Rock Slope Stability under the Condition of Excavation and Support

作　　者：贾欣媛[1] 任光明[1] 姚男[1] 牛毅[2] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]天津市地质调查研究院,天津300191

出　　处：《中国农村水利水电》2010年第6期134-137,共4页China Rural Water and Hydropower

摘　　要：岩质边坡在开挖过程中,由于层面、裂隙、节理等复杂结构面类型的存在,严重影响其稳定性。以某水电站岩质边坡工程为例,综合考虑岩体风化卸荷作用、断层岩脉发育、开挖边坡高陡的特点,采用有限元法,对边坡开挖、支护进行数值模拟,得出了工程边坡的应力状态、变形破坏区以及松弛范围,在此基础上分析了边坡开挖支护条件下的稳定性,论证了支护方案设计的合理性,并以此来指导施工,为同类型边坡的稳定性评价提供参考。Rock mass usually has complicated structure planes,such as bedding surfaces,fissures,joints ect,which seriously influence the stability of rock slopes when they are in the process of excavation.This paper takes the rock slope case of a hydropower station as an example,considering various factors of unloading of rock weathering,development of fault rock vein and the characteristics of high and steep slopes.The finite element method is used to simulate numerically the slope excavation and support to achieve the stress of slope,deformation zones and the relaxation r ange,based on which the stability of the slope excavation under the condition of support is analyzed in this paper.It also proves the rationality of the support programs and serves as a guide to the construction and a basis for the stability evaluation of similar slopes.

关 键 词：岩质边坡 开挖 支护 稳定性 锚固效果 有限元法 

分 类 号：TV223[水利工程—水工结构工程]