【摘要】 大岗山拱坝地质构造复杂,影响拱坝整体稳定的岩脉、断层、节理裂隙众多,针对工程地质特点,采用整体地质力学模型综合法试验与三维非线性有限元相结合的方法进行研究,对坝址区地形、地质条件,包括岩体、岩脉、断层、节理裂隙等主要地质缺陷的特征进行物理和数学模拟,分析坝体及基础变形特征,探讨坝肩、坝基失稳的破坏过程和破坏形态,得出拱坝及坝基综合稳定安全度为5.0～5.6(试验值)、5.6～6.0(计算值),以此评价工程的安全性,提出加固处理建议。更多还原

【Abstract】 The site of Dagangshan arch dam are featured with complicated geologic structures of various types of dikes,faults,joints and fissures,and its global stability is greatly influenced by these structures.In this work,methods of geomechanical model test and 3D nonlinear FEM calculation were used to study the global stability,including an analysis on geological defects,dam deformation,abutment displacements,failure process and failure mechanism.This analysis shows global safety factors of 5.0-5.6 by model test and 5.6-6.0 by FEM computation.On the basis of these factors,dam safety is evaluated and reinforcement measures are suggested.更多还原