水泥粉喷桩在桥梁工程中的应用

:2003205210:(19692),,,:100423918(2003)0520554204,(,453003):,,,,,,,,,,:;;:TU472.3+6:A,,3020,,,,,,,,,,,1,,,,,,;,;,,,22.1107,135,10m,20.6m,3,100cm,26m,2.2,1.8%,,::,,,,,2.12.5m,Ps=1.05MPa,fk=100kPa:,,,,,,,1.51.9m,Ps=0.8MPa,fk=80kPa:,,,,1.61.8m,Ps=1.15MPa,fk=110kPa215200310HENANSCIENCEVol121No.5Oct.2003©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.:,,,,1.52.0m,Ps=1.1MPa,fk=120kPa:,,,,,18m,Ps=8.6MPa,fk=200kPa7.47.6m,2.3,,,,,,6,,,,,,,1Fig.1Thesectiondrawingofabutment2.4(1)3.93m,30.5m,MU7.5,1(2),20,120,3.5kN/m2,,max=171kPa(3)[],,80kPamax,(4),,:fsp,k=mRdk/Ap+(1-m)fs,k(1):fsp,k;m;Ap;fs,k;,,0.51.0,,0.10.4,,;Rdk,,,,:Rdk=fcu,kApqp(2)Rdk=qsUpl+Apqp(3):fcu,k;,0.350.5;qs;Up;L;;0.40.6;qp;,fsp,k=180kPa,,Rdk=109.76kN,qp=100kPa,L=8.2m,0.5m,Up=1.57m,=0.196m2,281.6MPa,42.550kg,m=0.20:n=mA/Ap=0.23.9330.5/0.196=122124,2(5)()S1S2555200310©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2Fig.2Thelayoutplandrawingofthecementpowder2gushingpile()S1:S1=(Pc+Po)L/2Eo(4):Pc(),kPa;Po,kPa;L,m;Eo,kPa:Eo=mEp+(1-m)Es(5):m;Ep,kPa;Es,kPa,,,,:()=1.8cm,=3.5cm,2.0=10cm(L25m25m)S=S1+S2=5.3cm10cm,2.5(1):PH5A1;1,2,3,2,1,1,10(2):(3):500mm,8.29.5m,,,1m,,12%,m50kg,,23,,2811,248,5(4):28,2.0MPa,1.6MPa,134.14kN,109.76kN,205kPa180kPa,,2.6(1),III1.3t1.5t,0.3t1.5t(2),,,(3),,,(4),11,14,,25%(5),,,,655215©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3107,,1995,1148/,,,,,,,,,,,,,:[1]JGJ7922002,J22022002,[S].[2]GB5000722002,[S].[3].[M].:,1991.[4]JTJ024285,[S].Thecementpowder2gushingpileofapplicationinengineeringofbridgebuildingCHANGDong2hui,SANGYu2xiu(DesignandResearchInstituteinMunicipalAdministrationofXinxiang,Xinxiang453003,China)Abstract:Thesubgradecanbedividedintothenaturalsubgradeandartificialsubgrade,generallyadoptsthenaturalsubgradeintheengineeringofbridgebuilding.Tothesmall2scalebridgesandculverts,itsfoundationoftenadoptsthesimplefoundationduringthedesign,shallowonesbadsoilpropertylocalbases,adoptshallowunabletosatisfytherequisitionontheintensity,distortion,stabilityofthesubgrade,thecommonlymostusedmethodofbridgedesignistoadoptthedeepfoundation.Ifsetoutwiththeprinciplewitheffectiveeconomyaccordingtosuitingmeasurestolocalconditions,uselocalmaterials,canadoptthecompositedesignwhichstrengthenthesubgradetoo,akindofmethodtostrengthenthesubgradethatitiscompositethatthecementpowdergushingpile.Throughthedesignandconstructionformanyyearstothismethod,whichhasmadebetterresultofuseandeconomicbenefits,wethinkthatthecementpowdergushingpilecanbeappliedtothefoundationengineeringofthesmall2scalebridgesandculverts.Keywords:powder2gushingpile;compositesubgrade;application755200310©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.