碾压密实度对高面板堆石坝应力变形的影响  

Impact of Compacted Density on Stress and Deformation of High CFRD Dam

作　　者：燕乔[1,2] 吴晓铭[3,2] 张岩[2] 

机构地区：[1]中国水利水电科学研究院,北京100044 [2]三峡大学水利与环境学院,湖北宜昌443002 [3]国电大渡河流域水电开发有限责任公司,四川成都610041

出　　处：《水力发电》2010年第5期34-37,共4页Water Power

基　　金：中国水利水电科学研究院开放基金资助项目

摘　　要：大量工程经验表明碾压密实度对高面板堆石坝的应力变形有很大影响,而现行设计规范没有对200m级及更高面板堆石坝的压实标准提出明确的指导意见。通过对不同碾压密实度下的高面板堆石坝进行有限元仿真计算的结果表明:堆石体的碾压密实度从一个相对较低的数值提高到较高的数值时,坝体、面板的变形和应力分布得到明显改善;初步确定233m高水布垭面板堆石坝的最优干密度为2.18g/cm^3,250、270m高面板堆石坝的最优干密度分别为2.23、2.28g/cm^3。可为300m级超高面板堆石坝的建设提供参考。The compacted density has great influence on the stress and deformation of high CFRD dam,while the existing specifications do not give a clear guidance on the compacted density for CFRD dam with a height of 200 m or more.The finite element stimulations for high CFRD dam with different compaction show that the stress and deformation distribution of dam and concrete face is improved when the compacted density is raised from a lower value to a higher value.The optimum dry density for Shuibuya CFRD dam with a height of 233 m is 2.18 g/cm^3,and is 2.23 g/cm^3 and 2.28 g/cm^3 for dam with a height of 250 m and 270 m respectively.This study can provide a reference for the construction of 300m high CFRD dam.

关 键 词：高面板堆石坝 密实度 应力变形 最优干密度 水布垭面板堆石坝 

分 类 号：TV641.4[水利工程—水利水电工程] O342[理学—固体力学]