西藏老虎嘴水电站左岸渗流控制优化  

Seepage control optimization of left bank of Laohuzui hydropower station

作　　者：沈振中[1] 张鑫[1] 陆希[2] 魏坚振[2] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098 [2]西北勘测设计研究院,陕西西安710000

出　　处：《水利学报》2006年第10期1230-1234,共5页Journal of Hydraulic Engineering

摘　　要：西藏巴河老虎嘴水电站左岸副坝、防渗系统、围堰和厂房等均坐落在最深达206m的覆盖层之上。根据其工程地质条件,建立了能够反映其主要工程地质构造和坝基面几何形状的三维有限元模型,详细分析了其防渗墙的长度、深度以及覆盖层渗透性对下坝址左岸坝基渗流场的影响,提出布置长300m、深80m的悬挂式混凝土防渗墙或防渗帷幕的渗流控制优化设计方案,并建议采取反滤防护工程措施保护下游出逸面岸坡。The left auxiliary dam, anti-seepage system, cofferdam and power station of Laohuizui Hydropower Station on Bahe River of Tibet are sitting on an overburden layer with maximum depth of 206m. A 3-D finite element model of seepage flow is set up, which can represent the project geologic at structure and the geometry boundary of the dam foundation. The influence on the seepage field of the left bank of the length, the depth and the permeability of the overburden layer is analyzed in detail, and a optimizing disposal scheme of the suspension concrete anti-seepage wall with length of 300m and depth of 80m is put forward. The filter protection engineering measure is also advised for the exit part on downstream bank.

关 键 词：渗流 防渗墙 防渗帷幕 允许渗透坡降 优化 

分 类 号：TV139.14[水利工程—水力学及河流动力学]