不利结构面对高拱坝整体稳定影响及加固分析

坝肩稳定是高拱坝长期安全稳定最重要的问题之一，针对坝肩不利结构面的合理加固对保障高拱坝整体稳定至关重要。在复杂地基条件下，高拱坝整体稳定经常面临不利结构面的潜在影响，如坝肩抗力体内的滑块稳定性、断层及软弱带引起拱端变形、传力不协调等。结合实际工程，基于地质力学模型试验和三维非线性有限元成果，本文就坝肩不利结构面加固前后对高拱坝整体稳定影响进行分析，并总结了高拱坝四类典型不利结构面分布条件下的加固措施。研究成果可为类似工程整体稳定与加固分析提供参考。

Influence of adverse structural planes on overall stability and abutment reinforcement

Abutment stability is the most important factor in the overall stability of high arch dams, and reinforcement measures against adverse structural planes are crucial to guarantee the overall stability. Under complicated dam foundation conditions, unfavorable structural planes usually have a potential influence on the overall stability, such as wedge stability at abutment and uncoordinated deformation and force transmission due to faults and weak belts. This paper presents an analysis on the overall stability for typical high arch dam projects under the conditions of natural and reinforced structural planes based on the results of geomechanical model tests and nonlinear FEM calculations, and summarizes four typical types of structural planes at dam abutments and the corresponding reinforcement measures.