土石坝加固前后应力变形特性分析

Deformation and Stress Characteristic Analysis of Earth Dam Before and After Reinforcement

以某水库土石坝除险加固工程为实例,综合考虑了大坝渗流场和应力场的耦合效应以及混凝土防渗心墙与土体之间的接触效应,建立了土石坝防渗心墙除险加固前、后的弹塑性有限元模型,对土石坝加固前以及心墙加固后的应力、变形进行了计算,并进行了加固前后土石坝的应力变形对比分析以及加固后防渗心墙的应力变形特征分析,计算结果可为工程除险加固后的大坝安全监测与管理提供重要参考。

Taken earth dam reinforcement engineering of a certain reservoir as an example,considered the couple effect of seepage field and stress field and the contact effect between impervious core and soil body,the elastic-plasticity FEM of impervious core earth dam before and after reinforcement is set up.The impervious core deformation and stress before and after reinforcement are calculated,and the stress and deformation comparison of the earth dam and impervious core before and after reinforcement is made.The result can provide an important reference for this project on the dam safety monitoring and management.