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对高边墙的稳定性研究 ,除了受结构面控制的局部块体稳定性外 ,最为重要的问题是直立高边墙在地应力作用下 ,其弹塑性变形及由此而引起的边墙应力环境条件恶化所导致的破裂问题 ,这类问题可统称之为弹塑性变形稳定性 ,对这类问题的分析目前主要采用的是基于弹塑性理论的有限单元法数值模拟 ,且以二维分析为主。本文针对某地下电站工程较为复杂的岩体结构特征和地下空间形态 ,采用三维弹塑性有限元单元法模拟了随着地下厂房开挖的进行 ,高边墙岩体变形破坏的动态演化序列 ,进而对高边墙的稳定性现状进行了评价
In addition to the stability of the local block controlled by the structural plane, the most important issue for the research on the stability of high side walls is the elasto-plastic deformation of the vertical high side wall under the action of ground stress and the resulting stress of the side wall The problem of rupture caused by the deterioration of environmental conditions can be referred to as the stability of elastoplastic deformation. The analysis of such problems is mainly based on the finite element method of elasto-plastic theory, and the two-dimensional analysis is the Lord. In this paper, according to the complicated structural characteristics of rock mass and the shape of underground space in an underground power station project, the three-dimensional elasto-plastic finite element method is used to simulate the dynamic evolution sequence of the deformation and failure of rock mass in high side wall with the excavation of underground powerhouse. The status of the stability of the high side wall was evaluated