摘要
黄壁庄水库副坝曾多次出现管涌流沙和塌坝现象,其影响因素诸多,而基岩中溶洞和破碎带的存在是重要影响因素之一。为此,选择溶洞坝段进行三维渗流场的数值模拟,分析了溶洞的存在与否对坝基渗流场的改造作用以及对坝体渗透坡降的影响,并时设置防渗墙的必要性进行讨论,为除险加固措施的制订提供参考。
The phenomena of sand piping and dam collapse have occurred many times in the past years. There are many factors leading to such phenomena. It is out of question that the existence of karst and fractured zone in the rock foundation is one of the important factors. So the dam segment of karst in rock foundation was selected for the analysis of seepage flow in the dam base. On the hasis of numerical modeling of three-dimensional seepage flow, the impacts of kars karstification on the seepage flow in the dam base and on the seepage gradient in the dam body were analyzed, and the necessity of setting impervious wall was discussed, which helps assist the decision-making of measures for reinforcement of the dam.
出处
《地球与环境》
CAS
CSCD
北大核心
2005年第3期15-18,共4页
Earth and Environment
基金
国家自然科学基金(40172084)清华大学基础研究基金(Jc2003010)
关键词
渗流场
溶洞
防渗墙
水力梯度
seepage flow
karst
imperviou
wall
hydraulic gradient
