拉西瓦水电站坝基软弱断层的渗流及防渗  

Seepage analysis and anti-seepage study on weak faults of dam foundation at Laxiwa Hydropower station

作　　者：刘善利[1] 赵坚[1] 沈振中[1] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098

出　　处：《水利水电科技进展》2007年第4期55-59,共5页Advances in Science and Technology of Water Resources

摘　　要：对岩体中存在许多软弱断层(如F172)的拉西瓦水电站坝基渗流场进行了研究,通过对断层、周围岩体及防渗帷幕等各种相关量性质变化,计算并比较其防渗措施前后坝体各部分渗透流量及帷幕内最大渗透坡降。结果表明:对于贯穿坝体上下游、处在坝基关键部位、渗透各向异性且有着强透水路径的断层应进行封堵,并且采取帷幕灌浆、排水反滤等有效措施以保证坝体的稳定性。With Laxiwa Hydropewer Station taken as an example, the seepage field of the dam foundation with many weak faults （such as F172） in rocks was studied. By analysis of the variation of properties of faults, surrounding rocks, and anti-seepage curtains, the seepage quantity of each part of the dam body and the maximum hydraulic gradient in curtains before and after the adoption of anti-seepage measures were calculated and compared. The results show that the faults, which run through the upstream to downstream of the dam body and is located at the key parts of the dam foundation and characterized by seepage anisotropy and powerful penetrating channels, should be plugged, and the measures, such as curtain grouting and inverted filter, should be taken to ensure the stability of the dam body.

关 键 词：岩体 软弱断层 坝基渗流 有限单元法 拉西瓦水电站 

分 类 号：TV223.4[水利工程—水工结构工程]