基于向家坝水电站坝基破碎带岩体补强灌浆施工技术浅析

《基于向家坝水电站坝基破碎带岩体补强灌浆施工技术浅析》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、学兔兔www.xuetutu.com水利水电技术第46卷2015年第3期向家坝水电站坝基破碎带岩体补强灌浆施工技术浅析徐猛勇(湖南水利水电职业技术学院，湖南长沙410131)摘要：针对向家坝水电站坝基存在的挠曲核部破碎带碎屑结构岩体，水库蓄水前坝基防渗系统进行了常规水泥多排帷幕灌浆。为确保向家坝水电站蓄水发电运行后在长期高水头作用下坝基帷幕挠曲核部破碎带的渗流稳定，设计提出：应对该破碎带进行补强灌浆。针对补强灌浆，结合该破碎带岩体结构特性进行了“固孔止水灌浆”与“高压冲挤灌浆”组合工法研究与试验。现场试验与研究表明，向家坝水电站坝基挠曲核部破碎带采

2、用该组合工法进行补强灌浆后，防渗体可以达到设计提出的抗渗指标，且有关专家表示，这种组合_T-法为一创新工法，技术含量高，可作为向家坝水电站坝基挠曲核部破碎带地质缺陷岩体补强灌浆处理工法。关键词：向家坝水电站；坝基；破碎带；补强灌浆中图分类号：TV223(274)文献标识码：B文章编号：1000-0860(2015)03—0043—03Preliminaryanalysisonconstructiontechnologyofstrengtheninggroutingforrockmassinfracturedzoneunderdamfoundatio

3、nofXiangjiabaHydropowerStationXuMengyong(HunanVocationalandTechnicalCoUegeofWaterResourcesandHydroelectricPower，Changsha410131，Hunan，China)Abstract：Aimingattheclastic．structuralrockmassinthefracturezoneatthedeflectioncoreunderthedamfoundationofXiangjiabaHydropowerStation，theco

4、nventionalmulti—rowcurtaingroutingismadefortheanti—seepagesystemofthedamfoun-dationbeforetheimpoundmentofthereservoir．Inordertoensurethestabilityoftheseepagefromthehefracturezoneatthede—flectioncoreunderthedamfoundation，itisproposedinthedesignthatitisnecessarytomakeastrengthen

5、inggroutingforthefracturedzone．Forthestrengtheninggrouting，studyandexperimentaremadeontheconstructionmethodcombinedwithboththeconsolidationandwater—stopgroutingandthehighpressureimpact—extrusiongroutinginaccordancewiththestructuralcharac-·teristicsofrockmassinthefracturedzone．

6、TheresultsfromtheinsituexperimentandthestudyshowthatafteradoptingthecombinedconstructionmethodtostrengthenthefracturezoneatthedeflectioncoteunderthedamfoundationofXiangjiabaHydro—powerStation．theanti—seepagebodythereincanmeettheanti-seepageindexesproposedinthedesign．Furthermor

7、e，therele—rantexpelsindicatethatthiscombinedconstructionmethodisainnovatedonewithhightechnicalcontent，andthencanbeap—pliedtothestrengtheninggroutingforrockmassinthefracturezoneatthedeflectioncoreunderthedamfoundationofXian~iabaHydropowerStation．Keywords：XiangjiabaHydropowerSta

8、tion；damfoundation；fracturedzone；strengtheninggrouting计确定向家坝坝