预制桩防挤沟施工技术

20101391CONSTRUCTIONTECHNOLOGY81,(,325000)[],,,,,,,,,,[];;;;;[]TU75313[]A[]100228498(2010)0120081202ConstructionTechnologyofAnti2extrusionDitchforPrecastPilesMaoXiping,JinWen(WenzhouDongouConstructionGroupCo.,Ltd.,Wenzhou,Zhejiang325000,China)Abstract:Precastpileisadoptedinprojectsbecauseitcanbeconstructedfast,butitcausesgreatextrusioneffectduringconstruction.Inordertoprotectexistingbuildingseffectively,itsnecessarytoreleasethesoilstressbysettingupanti2extrusionditchwithstressreleasingholesduringconstructionofprecastpiles.Authorsintroduceconstructiontechnologyandanalyzeeconomicbenefitofanti2extrusionditch.Itprovesthatwithanti2extrusionditches,precastpilescanbeconstructedfastwithsimpleoperation,highsafetyandreliability.Keywords:pilefoundation;precastpile;anti2extrusionditch;stressreleasinghole;bamboocage;constructiontechnology[]2009205207[],,325000,:13957778569,E2mail:[e-mail],,,,,,,,,11),,,,,68m,3mm/d,2mm/d,2)110115m,,,115210m,,,3),,,L(1)V/L1133125(V,L)4)8239:L1Fig.1Locationofanti2extrusionditchandpilingsequence,,,,500600mm,1/31/2,,110210m5),,,(2)2Fig.2Formofanti2extrusionditches6),,20mm100mm,56,,,500mm7),2,1,,2040mm(3)8),,,9),,,3Fig.3Stressreleasingholefilledwithgravel2D601,,4179619m2,,PTC2500(65),50m,877,90d2,,,215m(),115m116m,115m25m,500mm,1/22515m(4)4Fig.4Constructionschemeofanti2extrusionditches3,,5m20082032152008205220,,,25d,75,4,,,,(93)2010No.1:93,,,[7]4c,,;,[8],,[7],51),,,,2),,;,,,;,,3):,,:[1],.()[M].:,2000.ChenZhaoyuan,CuiJinghao.Applicationofsoilnailingsupportinfoundationexcavation(2ndedition)[M].Beijing:ChinaArchitecture&BuildingPress,2000.(inChinese)[2],,.[J].,2004,(11):24226.HuangJunguang,FangYinqing,ZhuZongming.Applicationofstrengthenedsoilnailingwallinsupportofsuper2deepfoundationexcavation[J].GuangdongCivilEngineering&Construction,2004,(11):24226.(inChinese)[3],,.[J].,2006,32(3):90291.ZhouZiliang,ZhaoFuchao,YuanJiabei.Applicationcomplexsoilnailwallindeepfoundationpitsupport[J].ShanxiArchitecture,2006,32(3):90291.(inChinese)[4],,,.[J].,2004,23(12):212822132.DuanJianli,TanYuehu,FanYouwei,etal.Fieldtestingstudyoncompositesoilnailing[J].ChineseJournalofRockMechanicsandEngineering,2004,23(12):212822132.(inChinese)[5],,.[J].,2004,25(9):140121408.YangQian,ZhangMingju,SunTiecheng.Studyoncompositesoilnailinginsoftsubsoilbymodeltest[J].RockandSoilMechanics,2004,25(9):140121408.(inChinese)[6],,,.[J].,2005,24(5):8982904.ZhengZhihui,HeRuoping,XuXunchang,etal.In2situtestingstudyonretainingmiscellaneousfillslopebyusingcompoundsoilnailing[J].ChineseJournalofRockMechanicsandEngineering,2005,24(5):8982904.(inChinese)[7],,,.[J].,2008,29(10):282322828.WangGuihe,JiaCangqin,JiRongsheng,etal.Fieldtestingstudyofdeepandlargefoundationpitwithtwo2stepcompositesoilnailing[J].RockandSoilMechanics,2008,29(10):282322828.(inChinese)[8],.[J].,2001,23(3):3192323.ZhangMingju,GuoZhongxian.Researchonbehaviorsofsoilnailingbyfieldtest[J].ChineseJounalofGeotechnicalEngineering,2001,23(3):3192323.(inChinese)(82),,,:[1].[J].,2004,(9).MaoXiping,Technicalmeasuresinconstructionofstaticpressurepile[J].ZhejiangConstruction,2004,(9).(inChinese)[2],,.CFG[J].,2007,(4).QiaoJingsheng,XuYunyun,XuGuangyao.ExperimentalstudyonstressratioofpiletosubsoilincompositefoundationbyusingCFG(cement2flyash2gravel)piles[J].RailwayEngineering,2007,(4).(inChinese)[3],.[J].,2005,(3).FengWei,LiuZhan.Applicationofdeviationmeasuringmethodinobservingactioneffectsofholestorelaxstress[J].ShanxiArchitecture,2005,(3).(inChinese)[4],.[J].,2004,33(1).JiangJianping,GaoGuangyun.Environmentalproblemsandrelevantpreventionandcuremeasuresofconstructionofextruding2soilpiles[J].ConstructionTechnology,2004,33(1).(inChinese)