DG水电站F3缓倾断层原位高压渗透试验分析  

Analysis of the In-situ High Pressure Permeability Test of F3 Gently Inclined Fault in DG Hydropower Station Project

作　　者：张德强 孙兴伟 王敬勇 罗文 姜宏军 朱瑞晨 陈亮 ZHANG Deqiang;SUN Xingwei;WANG Jingyong;LUO Wen;JIANG Hongjun;ZHU Ruichen;CHEN Liang(Powerchina Huadong Engineering Co., Ltd., Hangzhou 311122, China;DG Hydropower Branch, Huadian Xizang Energy Co., Ltd., Shannan 856000, China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]华电西藏能源有限公司大古水电分公司,西藏山南856000

出　　处：《水电与新能源》2020年第11期12-19,共8页Hydropower and New Energy

摘　　要：DG水电站右岸出露的F3断层纵贯坝址区上下游,延伸长,且断层带内有断层泥、岩屑等细颗粒物质,存在渗透问题。为获得高压水头作用下断层结构面的渗透特性、渗透稳定性及结构面张开压力的可靠数据,通过对F3断层带进行现场原位高压渗透试验,分析F3断层发生渗透破坏的水力坡降,总结出渗透破坏规律,为设计提出了渗透破坏允许水力坡降的建议值。A long penetrating fault F3 is outcropped on the right bank of the DG hydropower station,which may lead to seepage problems due to the fine-grained materials such as fault mud and cuttings in the fault zone.To get reliable data of the seepage characteristics,seepage stability and opening pressure of the structural planes under high water pressures,in-situ high pressure permeability test is carried out in the F3 fault zone.The hydraulic gradient value when seepage failure occurs is determined.Then,the allowable hydraulic gradient value against seepage failure is recommended.

关 键 词：水电站 断层 高压渗透试验 渗透破坏 水力坡降 

分 类 号：TV223.6[水利工程—水工结构工程]