平寨水库左岸底层灌浆平硐砂层溶洞处理  

Treatment of Karst Cave in the Bottom of the Left Bank of Pingzhai Reservoir

作　　者：赵应武 龙云宝 杨元红 Zhao Yingwu;Long Yunbao;Yang Yuanhong(Guizhou Water Resources and Hydropower Survey and Design Institute Guiyang 550002,Guizho)

机构地区：[1]贵州省水利水电勘测设计研究院,贵州贵阳550002

出　　处：《陕西水利》2018年第5期134-136,共3页Shaanxi Water Resources

摘　　要：黔中水利枢纽工程平寨水库左岸底层灌浆平硐0+238%m^0+296%m段为大型砂层充填溶洞,充填物为岩屑夹粉砂土、崩块石,该溶洞是左岸山体段防渗帷幕的薄弱部位,对其处理是水库工程建设的重大技术问题之一,是关系水库蓄水成败的重要因素。为了彻底解决该洞段防渗问题,经分析论证,处理方案采用混凝土防渗墙技术及高压固结灌浆技术,墙体结构计算采用弹性地基理论,文克尔有限元计算方法。防渗结构已正常运行3年,期间未发生异常,防渗效果良好,说明处理方案合理有效。The middle part of the left bank of the Pingzhai Reservoir in the Suizhong Water Conservancy Project is 0＋238m - 0＋296m. The large sand layer is filled with karst caves. The filling material is sih-clay silt and block rock. The cave is the anti-seepage of the left bank mountain section. The weak part of the curtain is one of the major technical problems in the construction of the reservoir project, and it is an important factor in the success or failure of the reservoir. In order to completely solve the problem of seepage prevention of the tunnel section, after analysis and demonstration, the treatment scheme adopts concrete anti-seepage wall technology and high-pressure consolidation grouting technology. The calculation of wall structure adopts elastic foundation theory and Wenkel finite element calculation method. The anti-seepage structure has been in normal operation for 3 years, no abnormality occurred during the period, and the anti-seepage effect is good, indicating that the treatment plan is reasonable and effective.

关 键 词：混凝土防渗墙 高压固结灌浆 防渗帷幕 溶洞处理 弹性地基 黔中水利枢纽 

分 类 号：P642.25[天文地球—工程地质学] TV221.2[天文地球—地质矿产勘探]