摘要
设有混凝土防渗墙的土石坝出现坝顶纵向裂缝是常见的一种安全隐患,坝顶纵向裂缝的出现和扩展增加了大坝安全风险.本文在详细调查乌井水库纵向裂缝分布情况的基础上,经过一年运行周期的裂缝观测与变形观测,分析获得了纵向裂缝开度随库水位变化的扩展规律.进一步采用变形倾度法分析了大坝表面变形与坝顶纵向裂缝的相关性,结果表明:坝顶纵向裂缝的开度变化规律基本与变形倾度的增量变化一致,裂缝随变形倾度增量的减小而闭合,随变形倾度增量的增加而张开.
The longitudinal crack is a general potential vulnerability in the crest of earth-rock dam with concrete cut-off wall.However,the formation and propagation of longitudinal cracks in the dam crest increases the safety risk of dam.The longitudinal cracks distribution of Wujing Reservoir was investigated in detail in this study.Based on this investigation and monitor in a full operating cycle of the reservoir,the propagation law of longitudinal cracks with the variation of reservoir water level is obtained.With the deformation gradient method,the results reveal the deformation of the cracks are similar to the deformation gradient.
作者
王乐芹
胡松涛
章李乐
林太清
戴国强
WANG Leqin;HU Songtao;ZHANG Lile;LIN Taiqing;DAI Guoqiang(China Offshore Oil Engineering Company,Tianjing 300451,China;Jiangxi Academy of Water Science and Engineering,Nanchang 330029,China;Nanchang Municipal Hydraulic Planning and Designing Institute,Nanchang 330009,China)
出处
《江西水利科技》
2021年第3期229-234,共6页
Jiangxi Hydraulic Science & Technology
基金
江西省水利厅科技项目(201820ZDKT03,202021TGKT13)。
关键词
坝顶纵向裂缝
监测
变形倾度法
分析
乌井水库
Longitudinal crack
Monitor
Deformation gradient method
Analysis
Wujing reservoir
