单桩水平承载力计算方法研究与工程实例分析

43120131BuildingStructureVol．43No．1Jan．2013100045《》JGJ94—2008RhaRha。Rham。。。TU473．1A1002-848X201301-0095-05ResearchonthecalculationmethodofthehorizontalbearingcapacityforasinglepileandanalysisonengineeringexamplesFangYunfeiSunHongweiYanYingBeijingInstituteofArchitecturalDesignBeijing100045ChinaAbstractAccordingtothecalculationmethodofcharacteristicvalueRhaofthehorizontalbearingcapacityforasinglepilebyTechnicalcodeforbuildingpilefoundationsJGJ94—2008thesensitivitiesofdifferentparametersonthecalculatedvaluesofRhawereanalyzed．TheresultsshowthatRhawillbeinfluencedbythecalculationparametersespeciallytheproportionalcoefficientmofthehorizontalresistancecoefficientofthesoil．Accordingtotwoengineeringexamplestwocasesofthepiletopconnectedwithfixedandhingedorfreewerecalculatedandcomparativeanalysisofcalculationresultsandmeasureddatawasdone．TheresultsshowthatcalculationresultsofRhaforthepiletopconnectedwithhingedorfreearerelativelymoderatebutcalculationresultsofRhaforthepiletopconnectedwithfixedarerelativelyunsafe．Keywordspilefoundationcharacteristicvalueofthehorizontalbearingcapacit[e-mail]。0、、、、。。《》JGJ94—2008。。。11.10.65%Rha=0．75αγmftW0νM1．25+22ρg1±ζNNγmftA()n1、、0.65%Rha=0．75α3EIνxχ0a21211220130.802121.25。αα=5mb0槡/EI3α/1/mm/μN/m4。3CC．0.2hm=2d+1mhm2m=m1h21+m22h1+h()2h2h2m4hm3m=m1h21+m22h1+h()2h2+m32h1+2h2+h()3h3h2m5m15.7.5≥0.65%m10mmm。25.7.50.4。35.7.5φl。。1.212m、d、、、ρg、h、Nk。1。。1νMνx1αh＜2.4αh=2.42αh＞4.0αh=4.032.4＜αh＜4.0。1m/MN/m4d/mρg/%h/m101.0C40HRB4000.5/1.512.050mm。2ρg0.5%1.5%。3。4HRB335HRB400HRB400。51。mdρghRha-Rha1。1ρg、ρg＞0.65%3。2mRham＜5。3dRha。4ρg=0.65%ρg＜0.65%ρg＞0.65%ρgRha。Rha。5RhaRha。ρg＜0.65%Rhah。6ρg＜0.65%69431．1-RhaRhaρg＞0.65%Rha。。22.123HY0ΔY0/ΔH2。1.5m15.0m10025C40。4SP1～SP4SP1～SP3SP4。2.22H-Y0H-ΔY0/ΔH3。《》JGJ106—20036.4.1-1mm2。2Rha/kN/mmm/MN/m4/kN/mmm/MN/m4SP1105011.3010.03150027.734.07SP2105010.5611.23150027.724.07SP39006.0621.91150032.773.08SP49005.0130.09150028.343.937920132.3d=1.5mC40HRB400ρg=2.778%h=15.0m。ρg＞0.65%2νxm0～40MN/m450mm。43。3Rha/kN90010501500m/MN/m414.3518.5533.622.7m4.5m5.7.5m6～14MN/m4m14～35MN/m4。3m15MN/m441m12m25。hmm5.7.5。4m-Rha5m1-m233.16。1.5m40.0m2432C45。7HPSHPNHPSHP1HP2HPNHP3HP4。71.5m。100mm67。。3.24H-Y0H-ΔY0/ΔH8H。4Rha/kN/mmm/MN/m4/kN/mmm/MN/m4HPS6403.267.09112013.851.62HPN6402.6110.28112010.902.416.4.1-1mmm5。5Rha/kNm/MN/m46401.818.9011204.6122.603.3d=1.5m89431．8HY0ΔY0/ΔH9m-RhaC45HRB335ρg=1.092%h=40.0m。ρg＞0.65%2、νMνxm0～10MN/m470mm。95。9hm=2d+1=5.0m、5.7.5、m6～14MN/m4。5m1.8MN/m4m2.5～6MN/m4、。m。410.65%3、0.65%。2mdρghm。3hmmm。4、。21。7。、、TMD。。1．J．200158-13．2．D．1999．3JGJ3—2010S．2011．1026120。230%。。3、。20、、。1．J．200740S1179-183．99