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在拱坝建设中,坝肩稳定性是一个十分重要的问题。由于岩体中存在断层、节理等不连续面,拱坝坝肩三维稳定性分析十分复杂。本文以一个具有断层和三组正交密集节理的实际工程为例,分别进行了三维非线性有限元计算和地质力学模型试验。研究表明,在设计荷载范围内,计算得到的位移值和模型试验值比较接近,计算和试验得到的破坏机理也大体上相似。
In the construction of arch dams, abutment stability is a very important issue. Due to the existence of faults, joints and other discontinuities in the rock mass, the three-dimensional stability analysis of arch dam abutments is very complicated. In this paper, a three-dimensional nonlinear finite element calculation and geomechanical model tests are performed for an actual project with faults and three groups of orthogonal dense joints. The study shows that within the design load range, the calculated displacement values are close to the model test values, and the damage mechanisms calculated and tested are also similar.