复杂地质条件下东庄特高拱坝坝趾加固措施研究

Research on Reinforcement Measures for Toe of Dongzhuang High Arch Dam Under Complicated Geological Conditions

特高拱坝的起裂、屈服和失稳破坏等主要来源于拱坝坝踵和坝趾等应力集中区域,尤其是坝趾处可能发生压剪损伤,该部位岩体稳定和基础加固决定着拱坝的安全度。基于东庄水利枢纽工程特高拱坝,结合基于变形加固理论的三维弹塑性有限元整体变形分析成果与地质力学模型试验成果,提出了东庄水利枢纽工程特高拱坝坝趾加固设计方案。

The cracking,yielding,and instability failure of ultra-high arch dams mainly originate from stress concentration areas such as the heel and toe of the arch dam,especially the possibility of compressive shear damage at the toe.The stability of the rock mass and foundation reinforcement in this area determines the safety of the arch dam.This article was based on the Dongzhuang Water Conservancy Projects ultra-high arch dam,combined with the overall deformation analysis results of three-dimensional elastic-plastic finite element based on deformation reinforcement theory and the results of geomechanical model tests,and proposed a reinforcement design scheme for the ultra-high arch dam toe of the Dongzhuang Water Conservancy Project.