库水位变化下土石坝非稳定渗流场影响分析  

Analysis for Effect of Reservoir Water Level Changing on Unsteady Seepage Field of Earth-rock Dam

作　　者：李婧 

机构地区：[1]大兴安岭地区行署水务局,黑龙江大兴安岭165000

出　　处：《黑龙江水利科技》2017年第7期26-29,149,共5页Heilongjiang Hydraulic Science and Technology

摘　　要：土石坝是当今水利工程设计中最普遍的坝型之一,防渗体系的构建显得尤为重要,目前发生的工程事故起因多是坝体和坝基的渗漏破坏导致。在大坝渗漏破坏导致的安全事故中,以蓄水期库水位升降从而引发的非稳定渗流问题最为突出,多起溃坝事故发生原因是初次蓄水速度选取不当而引起。故在实际工程中,进行非稳定渗流场分析研究十分必要。文章结合工程实例,对土石坝进行渗流场与应力场耦合分析,通过与非耦合情况的计算结果对比,表明进行渗流场与应力场的耦合分析是贴合工程实际的。The earth-rock dam is one of the most popular dam types in current hydraulic project design,so the seepage protection system appears to be particular important,at present,most of the project accidents are caused by leakage of dam body and foundation. In the accidents caused by dam leakage,the problem of unsteady seepage caused by reservoir water level changing in storage period is most prominent. Many dam-failure accidents were caused by improper selection for the first storage velocity.Therefore,it is necessary to analyze and study the unsteady seepage field in actual projects. In combination with project case,this paper analyzed the seepage field and stress field coupling for the earth-rock dam,by comparing the calculated results of un-coupling field,and it was shown that the coupling analysis of seepage field and stress field is suitable to the actual project.

关 键 词：土石坝 渗流场 库水位 变化 影响 

分 类 号：TV641[水利工程—水利水电工程] TV223.4