摘要
以某土石坝为研究对象,采用有限元法分析防渗墙不同质量缺陷对大坝稳定性的影响。分析结果表明:当防渗墙渗透系数与坝体土层相近时,大坝抗滑安全系数小于允许值,坝体浸润线偏高,影响结构整体稳定;当防渗墙潜在裂缝位于坝体土层或强风化层时,结构可能发生局部渗透破坏或整体坝坡失稳。因此,在实际工程中,应严控施工工艺,防止防渗墙出现质量缺陷,保障大坝安全运行。
Taking an earth-rock dam as the research object, we will analyze the effect of different quality defects of the cutoff wall on the stability with the finite element method. The analysis results show that when the permeability coefficient of the cutoff wall is close to the soil layer of the dam, the anti-slide safety factor of the dam is less than the allowable value, and the dam body infiltration line is too high, which affects the overall stability of the structure. When the potential crack of the cutoff wall is located in the soil of the dam body layer or strong weathering layer, the structure may undergo local seepage damage or the whole dam slope is unstable. Therefore, in actual projects, we should control the construction process strictly, and prevent quality defects in the cut-off wall and ensure the safe operation of the dam.
作者
周建云
Zhou Jianyun(Jiangxi Yuanhuiqu Engineering Management Bureau,Xinyu 338000,Jiangxi)
出处
《陕西水利》
2020年第7期14-16,共3页
Shaanxi Water Resources
关键词
防渗墙缺陷
初始裂缝
渗透系数
稳定
Cutoff wall defect
initial crack
permeability coefficient
stability
