换填法垫层最小厚度的直接计算法

:1001-831X(2000)-04-0286-04换填法垫层最小厚度的直接计算法X王俊雄1　　赖晓斌2(1.,,400045;2.,,400031):本文给出了直接计算条形基础和矩形基础下换土垫层最小厚度的计算方法,可供设计参考。:浅基础;垫层厚度;软弱土层:TU472.2:B1　前言,,,,,,,,,2　公式推导,d(1):[1]3.2.1,,:pz+pczfz(1)pcz=C1d+rzz(2)pz=b(p-pc)b+2ztgH(3)fz=fk+Gbrb(b-3)+Gdro(d+z-0.5)(4)b=b+2ztgH1(5)pz;b;pcz;d;204Vol.20No.4200012UNDERGROUNDSPACEDec.2000X:2000-06-15:(1967-),,,,fz;z;pc;rz;rG;fk;HH1;GbGd;pro;ro=(C1d+rzz)/(d+z)rzrb;C1(2)(3)(1):b(p-C1d)b+2ztgH+C1d+rzzfzb(N1/b+rGd-C1d)b+2ztgHfz-C1d-rzzNb+2ztgHfz-C1d-rzz(6)(5)(4):fz=fk+GbCb(b+2ztgH1-3)+Gdrz(d+z-0.5)=fk+Gbrb(b-3)+Gdrz(d-0.5)+2GbrbtgH1+Gdrzzfz-C1d-rzz=fk+Gbrb(b-3)+Gdrz(d-0.5)-C1d+(2GbrbtgH1+Gdrz-rz)z=F+Rz(7)F=fk+Gbrb(b-3)+Gdrz(d-0.5)-C1dR=2GbrbtgH1+Gdrz-rz(7)(6):Nb+2ztgHF+R.z:2tgHRz2+(2tgHF+Rb)z+Fb-N0z-(2tgHF+Rb)+(2tgHF+Rb)2+8tgHRN4tgHR(8)H=0,zN-FbRb=NRb-FR(9)(2)pz:pz=bl(p-C1d)(b+2ztgH)(l+2ztgH)(1):bl(N1bl+rGd-C1d)(b+2ztgH)(l+2ztgH)fz-C1d-rzz:N(b+2ztgH)(l+2ztgH)F+Rz:4tg2HRz3+[4Ftg2H+2RtgH(b+l)]z2+[Rbl+2FtgH(b+l)]z+Fbl-N0a=4tg2HR,b=4Ftg2H+2RtgH(b+l)c=Rbl+2FtgH(b+l),d=Fbl-N28720004::az3+bz2+cz+d0(10)z,,:baz2+caz+da0,z,H=0,zN-FblRbl=NRbl-FR(11)(3):z0.5b,[1]3.2.1H,H1=H,z,z0.5b,H,H1z3　实例(1),112F=100+1.122(1.2-0.5)-181.2=93.8R=1.122-22=2.2z0.5b,H=30,(8)z0.75mz=0.938b0.5b,(2),2F=80+1.122(1.0-0.5)-181.0=73.0R=1.122-22=2.2z0.5b,H=30,:a=2.933,b=99.56,c=228.5,d=-414.4:2.933z3+99.56z2+228.5z-414.40,z1.2mz=0.86b0.5b,4　结束语1:;2:,,28820,()[][1](JGJ79-91)[S],1992.[2](GBJ7-89)[S],1989.(267),,,3.9,,,,,,4　结语,,,,,,,,,,,,,,,,,,[][1],.[M].,199111[2].[M].,199812[3],,.[J].,1999(4):26.28920004:studytheinfluenceofpsychologicalenvironmentinundergroundspace.Areviewandsummaryonstudiesofinfluenceofpsychologicalenvironmentinundergroundspacebothathomeandabroadweregiveninthispaper.Theproblemsexistedandthecountermeasuresforitsimprovementweresuggested.[Keywords]Undergroundspace;psychologicalenvironment;influenceDiscussiononSafetyofBuildingsnearFoundationPitLEIYongetal.(282)[Abstract]Thekeypointofthesafetyforthebuildingsneartheprojectwithfoundationpitisthecontrolofmoredisplacementofthesupport.Inthispaper,someeffectivetreatmentsandmethodsaboutthecontrolareinitiallyproposed.[Keywords]Foundationpit;inactivedesign;top-to-downconstruction;displacementDirectCalculationoftheMinimumThicknessofCushionwithFillingReplacementWANGJun-xiongetal.(286)[Abstract]Inthispaperadirectcalculationfortheminimumthicknessofthecushionwithfillingreplacementunderstripandrectangularfoundationswaspresented.Itcanserveasreferenceforthedesignwork.[Keywords]Shallowfoundation;thicknessofcushion;softsoilNumericalAnalysisoftheSurroundingRockMassStabilityinDachangTongkingTinMineZHOUXiao-pinetal.(290)[Abstract]Inthispaper,basedonactualgeologicalconditioninDachangTongkingTinMinestope,thestabilityanalysisofthestopewasstudiedandsomeusefulconclusionshavebeengainedbyFEM.Theycanserveasguideforthemineexploitation.[Keywords]FEM;stabilityanalysis;stopeAnalysisofRetainingWallAccidentbyExcavationLIUXing-yuanetal.(294)[Abstract]Accordingtoanalysisonreasonforcrackingofretainingwallincertainproject,itshowsthattheshallowexcavationinmountainareamaycausedamageofbuildingorconstructionnearbyandleadtohiddensafetyproblems.Theexperienceofthisengineeringprojectmaybeusefulasreferencetodesignandconstructionworks.[Keywords]retainingwall;foundationpit;slopestabilityTRANSLATIONSObservationsofDeformationandEngineeringGeologyintheLamTaKhongTunnel,ThailandBySHIZhong-ping(299)PlanningandDesignofaCivilDefenceShelterStationinSingaporeByMAJi-xin(307)3152000.No.4CONTENTSANDABSTRACTS