高压摆喷灌浆技术在坝基防渗加固修复中的应用  

Application of High-pressure Swing-jet Grouting in Dam Foundation Reinforcement

作　　者：史天波 陈文斌[2] 

机构地区：[1]贵州中水建设管理股份有限公司,贵州贵阳550002 [2]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《浙江水利水电学院学报》2017年第3期16-19,共4页Journal of Zhejiang University of Water Resources and Electric Power

基　　金：国家科技支撑计划项目(2015SXC21P35);中央高校基本科研业务费专项资金(37809506)

摘　　要：为解决七里坡水库大坝坝基渗漏问题,结合安全鉴定成果和高压喷射灌浆技术优势,选取在大坝上游坝坡增设垂直防渗体的加固修复处理方案.采用摆喷灌浆技术,对坝体和坝基粉砂层、河流冲积层及强风化基岩进行高压水泥浆液灌注,硬化后形成固结体实现对渗漏通道的有效堵截.经现场开挖检查、围井注水试验、室内检测和渗流监测,结果表明:防渗墙体整体连续性和密实度均较好,各项检测指标均满足设计规范要求,坝基渗漏得到有效处理.Aiming at the seepage of dam foundation in Qilipo Reservoir, combined with the safety appraisal analysis and the advantages of high pressure jet grouting technology, the reinforcement scheme with additional vertical anti-seepage body at dam up-stream has been adopted. Using the swing grouting technology, the dam and dam foundation silt layer, river alluvi-al layer and strong weathering bedrock has been grouting by high pressure cement slurry, and the leakage passage can be effectively intercepted by the hardened solidified structure. Every index of the seepage control body with good overall conti-nuity and density is proved to meet the requirements of design by excavating checks, water injection experiments, indoor sampling inspections and seepage monitoring. The foundation leakage has been effectively treated with good anti-seepage effect.

关 键 词：水库 高喷灌浆 渗透系数 防渗墙 

分 类 号：TV698.23[水利工程—水利水电工程]