复杂坝基下胶凝砂砾石坝破坏特征的研究  

Research on the Failure Characteristics of Cemented Sand and Gravel Dam Under Complex Dam Foundation

作　　者：刘金光 Liu Jinguang(Jiangxi Water Investment and Construction Group Co.,Ltd.,Nanchang 330000,Jiangxi)

机构地区：[1]江西省水投建设集团有限公司,江西南昌330000

出　　处：《陕西水利》2023年第12期134-136,共3页Shaanxi Water Resources

摘　　要：坝基稳定对大坝稳定性具有决定性作用。依托胶凝砂砾石坝工程,基于相似理论设计模型试验,对复杂坝基条件下的凝砂砾石坝稳定性进行分析。结果表明:坝体仅在试验初期坝趾和坝踵位置出现了短暂受拉现象,其余阶段均为受压状态。坝体中部应变相对于坝趾和坝踵处偏大。坝体水平变位与坝体高程为负相关关系。坝踵位置处相较于坝体出现更为明显的沉降。整体而言,坝体结构未发生破坏,体现了胶凝砂砾石坝对坝基的强适应性。研究结果对复杂地基条件下的胶凝砂砾石坝的设计有一定的指导意义。Dam foundation stability plays a decisive role in dam stability.Relying on the cemented sand and gravel dam project,a model test was designed based on the similarity theory to analyze the stability of the cemented sand and gravel dam under complex dam foundation conditions.The results show that the dam body only experienced temporary tension at the dam toe and dam heel in the early stages of the test,and was in a compressive state in the rest of the stages.The strain in the middle part of the dam body is larger than that at the dam toe and dam heel.There is a negative correlation between the horizontal displacement of the dam body and the dam body elevation.There is more obvious settlement at the dam heel than at the dam body.Overall,the dam structure has not been damaged,which reflects the strong adaptability of the cemented sand and gravel dam to the dam foundation.The research results have certain guiding significance for the design of cemented sand and gravel dams under complex foundation conditions.

关 键 词：胶凝砂砾石坝 复杂地基 模型试验 结构面 

分 类 号：TV641[水利工程—水利水电工程]