《河南水利与南水北调》2022年第12期施工技术流沙基础脚槽施工技术方案比选郝中州1,杨淼1,陈志军2(1.河南黄河河务局,河南郑州450002;2.河南华北水利水电勘察设计有限公司,河南郑州450045)摘要:碾盘山水利枢纽工程导流明渠施工,针对边坡脚槽开挖时出现的流沙现象,提出钢板桩支护、降水井抽水及搅拌桩替换三种解决方案。通过现场试验及技术讨论,从施工效率、施工进度、施工成本等角度进行综合比选,选择双排搅拌桩等强度替换钢筋石笼脚槽方案,解决流沙基础脚槽难以开挖成型的问题。汛期经过洪水冲刷,搅拌桩脚槽对边坡的防护效果良好。关键词:流沙基础;脚槽;方案比选中图分类号:TV753文献标识码:B文章编号:1673-8853(2022)12-0042-02ConstructionTechnologyandSchemeComparisonofQuicksandFoundationFootGrooveHAOZhongzhou1,YANGMiao1,CHENZhijun2(1.HenanYellowRiverRiverBureau,Zhengzhou450002,China;2.HenanNorthChinaWaterConservancyandHydropowerSurveyandDesignCO.LTD.,Zhengzhou450045,China)Abstract:IntheconstructionofopenchanneldiversionofNianpanMountainWaterControlProject,aimingatsolvingthequicksandphenomenonduringtheexcavationofslopefootgroove,threesolutionswereproposed,includingsteelsheetpile,dewateringwellandmixingpile.Throughfieldtestandtechnicaldiscussion,comprehensivecomparisonandselectionarecarriedoutfromtheperspectivesofconstructionefficiency,constructionprogress,constructioncost,etc.Theplanofreplacingthereinforcedgabionfootchannelwithdoublerowmixingpilesandotherstrengthsisselectedtosolvetheproblemthatthefootchannelofquicksandfoundationisdifficulttobeexcavatedandformed.Themixingpilefootgroovehadbeenprovedtohavethegoodprotectioneffectontheslope,afterthefloodscouringinfloodseason.Keywords:quicksandfoundation;footgroove;schemecomparisonandselection■■■■■■■■■■■■■■作者简介:郝中州(1964—),男,高级经济师,主要从事引黄供水工程建设与运行管理。1引言深基坑开挖,为保证边坡的安全和稳定,首先要控制的是地下水位。对基坑的降水要求是深基坑施工的重要组成部分。基坑降水通常采用管井、轻型井点等措施即可满足施工要求,但遇到地层条件差(粉细砂层深厚,渗透系数大)、地下水源充足(紧邻河道、水库)等不利条件...