第19卷第2期地下空间与工程学报Vol.192023年4月ChineseJournalofUndergroundSpaceandEngineeringApr.2023富水砂层高压旋喷桩注浆材料防渗性实验研究吴凯1,陈荣刚1,顾海荣1,袁洁君1,钱夏清2(1.江苏省送变电有限公司,南京211899;2.江苏开放大学建筑工程学院,南京210036)摘要:目前富水砂层高压旋喷桩止水帷幕水泥浆流失严重、成桩质量差。如何有效防止水泥浆流失、保证成桩质量是富水砂层地下止水帷幕施工的关键。本文依托张家港220kV晨阳至晨港线路工程电缆土建工程,选取高聚物+水泥、地聚物+水泥、赤泥+磷石膏+水泥作为注浆材料,开展富水砂层高压旋喷桩现场试桩实验,监测试桩注浆流量和注浆压力,龄期60d时,对试桩取芯并制作试样,开展试样的渗透实验和无侧限抗压强度测试,研究富水砂层高压旋喷桩注浆材料防渗性能。结果表明:3种固化粉砂土抗渗性能均能达到10-7量级;3种固化粉砂土抗渗性能依次为高聚物+水泥固化粉砂土>赤泥+磷石膏+水泥固化粉砂土>偏高岭土+水泥固化粉砂土,可以满足高压旋喷桩的防渗性能要求。本研究可为富水砂层高压旋喷桩参数优化提供设计依据。关键词:高聚物;地聚物;赤泥;高压旋喷桩;防渗性能中图分类号:TU473文献标识码:A文章编号:1673-0836(2023)02-0533-08ExperimentalStudyonSeepageControlPerformanceofHighPressureJetGroutingPileUsingGroutingMaterialinWater-RichSandLayerWuKai1,ChenRonggang1,GuHairong1,YuanJiejun1,QianXiaqing2(1.TransmissionandDistributionCompanyinJiangsuProvince,Nanjing211899,P.R.China;2.SchoolofCivilEngineering,JiangsuOpenUniversity,Nanjing210036,P.R.China)Abstract:Atpresent,thecementslurryofthewater-proofcurtainofthehigh-pressurejetgroutingpileinthewater-richsandlayerisseriouslylostandthequalityofthepileispoor.Howtoeffectivelypreventthelossofcementslurryandensurethequalityofpilesisthekeytotheconstructionofundergroundwater-stopcurtainsinthewater-richsandlayer.ThispaperreliesonZhangjiagang220kVChenyangtoChenganglineproject-cablecivilengineering,selectspolymer+cement,geopolymer,redmud+phosphogypsum+cementasthegroutingmaterial,andcarriesoutthefieldtestofthehighpressurejetgroutingpileinthewater-richsandlayer.Pileexperiment,monitoringthegroutingflowandgroutingpressureofthet...