考虑流固耦合的复杂坝基土石坝稳定性分析  

Stability Analysis of Earth Rockfill Dam with Complex Foundation Considering Fluid Structure Interaction

作　　者：韩长胜 HAN Chang - sheng(Ninghe District Water Bureau of Tianjin, Tianjin 301500, China)

机构地区：[1]天津市宁河区水务局,天津301500

出　　处：《水利科技与经济》2018年第1期46-49,共4页Water Conservancy Science and Technology and Economy

摘　　要：土石坝蓄水后存在渗流场与应力场的耦合效应,若简单将应力场和变形场分开考虑,其计算结果与实际情况相差较大,难以反映工程实际情况。采用大型三维有限差分软件建立复杂坝基的土石坝模型,并分别进行不同库水位下考虑流固耦合和未考虑流固耦合的坝体渗流和稳定性计算,分析流固耦合对土石坝稳定安全系数、最大沉降量以及最大拉应力的影响。结果表明,坝体蓄水后其应力场与渗流场耦合作用是不可忽视的,考虑流固耦合的土石坝更不安全。The coupling effect of seepage field and stress field exists after the embankment dam is filled with water. If the stress field and deformation field are taken into account separately, the cal- culation results are quite different from the actual situation, so it is difficult to reflect the actual situ- ation of the project. The earth rock dam with large three - dimensional finite difference model to es- tablish complex dam foundation software, and respectively in different water level under the consid- eration of fluid solid coupling and without considering fluid solid coupling seepage and stability cal- culation, based on the fluid solid coupling safety factor and stability of earth rock dam settlement and the influence of the maximum tensile stress. The results show that the coupling of stress field and seepage field can not be neglected when the reservoir is filled with water, and the dam with flu- id solid coupling is more unsafe.

关 键 词：土石坝 流固耦合 有限差分软件 稳定性 

分 类 号：TV223[水利工程—水工结构工程]