帷幕灌浆和灌注桩在面板堆石坝趾板煤层地基涌水处理中的应用  

Application of Curtain Grouting and Bored Pile in Water Surge Treatment of Coal Seam Foundation at Toe Board of Rockfill Dam with Face Slab

作　　者：何伟[1] 陈勇[1] HE Wei;CHEN Yong(Sinohydro Bureau,Co.,Ltd.,Changsha,Hunan,410004)

机构地区：[1]中国水利水电第八工程局有限公司,湖南长沙410004

出　　处：《红水河》2020年第6期102-106,共5页Hongshui River

摘　　要：针对面板堆石坝趾板煤层地基出现的涌水情况,并结合煤层遇水易软化、透水性差等特点,笔者提出采用帷幕灌浆和灌注桩两种方法对煤层地基涌水进行处理,并介绍了两种方法的施工工艺,通过采用检查孔压水试验对涌水处理效果进行检查,得出结论:灌注桩能一次性处理煤层地基涌水问题,取得理想的防渗效果;而帷幕灌浆需经多次反复处理才能达到防渗要求,工期长,阻渗效果差。采用灌注桩对煤层地基涌水处理的方法对类似地质条件的工程具有很好的指导和借鉴作用。According to the water surge situation of the coal seam foundation in the toe slab of the rockfill dam with face slab,combined with the characteristics of the coal seam easy to soften and poor water permeability,the authors put forward two methods of curtain grouting and bored pile to treat the water surge of the coal seam foundation,and introduce the construction technology of the two methods.Through the water pressure test of the inspection hole,the treatment effect of the water surge is checked,and the conclusion is that the bored pile can deal with the water surge problem of coal seam foundation at one time and obtain ideal anti-seepage effect;while the curtain grouting needs to be treated repeatedly for many times to meet the anti-seepage requirements,with long construction period and poor anti-seepage effect.The treatment of water surge from coal seam foundation by bored pile has a good guidance and reference for similar geological conditions.

关 键 词：面板堆石坝 趾板 煤层地基 灌注桩 帷幕灌浆 涌水处理 

分 类 号：TV543.5[水利工程—水利水电工程]