防渗墙施工缺陷对硗碛大坝影响分析  

Analysis of Effects of Cutoff Wall Construction Defects on Yaoji Dam

作　　者：李宏恩[1] 李同春[1] 王寿根[2] 王新[1] 

机构地区：[1]河海大学水利水电学院,南京210098 [2]中国水电顾问集团成都勘测设计研究院,成都610072

出　　处：《三峡大学学报（自然科学版）》2008年第6期33-37,共5页Journal of China Three Gorges University：Natural Sciences

摘　　要：修建于深厚覆盖层上的土石坝,其防渗体系的可靠性直接关系到大坝的运行安全.针对硗碛直心墙土石坝防渗墙存在施工缺陷的实际工程特点,分别采用降低材料弹性模量以及设置接触面单元的方法对防渗墙的施工缺陷进行了模拟,分析了防渗墙局部缺陷对防渗体系应力变形以及大坝稳定性的影响.计算结果表明,防渗墙的缺陷对坝体应力变形基本无影响,对防渗墙自身的应力变形影响较大,应进行必要的工程处理.The reliability of seepage prevention system is directly related to the operation safety of earth-rockfill dam built on the deep overburden layer. In the practical construction, defects in the cutoff wall of Yaoji vertical core wall earth-rockfill dam were detected. According to the characteristic, methods of reducing the materials＇ elastic moduli and setting interface elements to simulate the defects are utilized. Besides, the effects of construction defects on stress-deformation of seepage prevention and the stability of the dam are analyzed. The results show that the defects of the cutoff wall have little effect on the stress deformation of the dam body, but have great effect on the stress-deformation of the cutoff wall itself. Essential engineering treatments are needed.

关 键 词：施工缺陷 硗碛水电站 防渗墙 接触面单元 

分 类 号：TV543.8[水利工程—水利水电工程]