土力学(双语)课件PPT资料.pptPPT资料.ppt
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土力学(双语)课件PPT资料.pptPPT资料.ppt
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Whatsincludedbysoilmechanics?
Howtolearnsoilmechanicswell?
INDUCTION,soil:
Theparticleaccumulationscoveredonthegroundsurfacewhichisclastic、eccementitiousorweakcementation,formatedfromthewholerockofearthsurfacewhichsubjectedtolong-termweatheringinair.,Introduction,weathering,Whatsthesoil?
Characteristicsofsoil?
Introduction,particulatecharacteristic,Characteristicsofsoil?
Discretemedium,easilytobedeformedafterbeingforcedvolumechangesisholechangeschieflyshear-cutdeformationiscausedbyrelativedisplacementlowstrength,Introduction,Weatheringproductofrock,discretemedium,tri-phasesystem,undertakethroughbothsoilframeworkandholemediumafterbeingforcedexistingcomplexinteractingholefluidflow,Introduction,Characteristicsofsoil?
solidphasesoilframeworkliquidphasewatervaporphasegas,naturalvariability,naturalproduct,Introduction,Characteristicsofsoil?
heterogeneityaeolotropismdesignabilityspace-timevariability,particulatecharacteristic,tri-phasesystem,naturalvariability,complexmechanicalcharacter,deformationcharacteristicstrengthcharacteristicpermeationcharacteristic,Introduction,Characteristicsofsoil?
Introduction,Characteristicsofsoil?
soilmechanics,Introduction,elementaryknowledgeofcontinuousmediummechanics,describethetheoryofparticulate,deformation,strengthandpermeabilityofsoilandtheirengineeringproblems,soilmechanicsphylogeny,1776Coulombintensitylaw,soilpressuretheory1856Darcylaw1857Rankinenewsoilpressuretheory1925Terzaghieffectivestresstheoryandpermeate-consolidatetheoryinternationalsoilmechanicsandfoundationengineeringconferenceofthefirsttime1949theriseofsoilmechanicsstudyinChina,Introduction,Characteristicsofsoil?
soilmechanicsbecomeasignificantsignofindependentsubjectTerzaghiisafounderofsoilmechanics,Whytolearnsoilmechanics?
soilhaswidespreadprojectapplication2.manyengineeringproblemsaboutsoil,Introduction,projectapplicationofsoil,buildingmaterialsofcivilengineeringgroundworkbuildingfoundationstructureenvironment,Introduction,Whytolearnsoilmechanics?
engineeringproblemsaboutsoil,Introduction,Whytolearnsoilmechanics?
Engineeringproblemsaboutsoil,Introduction,Whytolearnsoilmechanics?
TlangsikangbarnofCanada,accident:
ladegraininSep.1911,31822grainwasladedinOct.1911,1hourverticalsettlement:
30.5cm24hoursstilt:
2653westernsubsidence:
7.32measternarise:
1.52mupsidesteelconcretesilowithoutdamage,Survey:
length:
59.4m,width:
23.5m,high:
31.0m,total:
65cylinderbarns.steelconcreteraftflankfoundation,thick:
61cm,deep:
3.66m.startin1911,endin1913,self-weight:
20000T.,Engineeringproblemsaboutsoil,Introduction,Whytolearnsoilmechanics?
TlangsikangbarninCanada,reason:
Groundworksoilwasntinvestigatedbeforehand,accordingtothesoiling-testingresultofclosestructurefoundationditch,usingthewayofcalculatingthegroundbearingcapacityintothisbarn.Bywayofthereconnaissancetestingandcalculatingin1952,thepracticalgroundbearingcapacityisfarlessthanthefoundationpressurewhenthebarnisdestroyed.Thus,theintensiondamagewillbetookplacebecauseofoverloading,whichleadsthebarn-foundationtoglide.,transacting:
Aftertheaccident,mademorethan70concretepierssupportingonbedrocksunderthebarn,andmadebarnbodycorrectedgraduallyusing38850tjacksandsupport-system,butthehighreducedbym.,Engineeringproblemsaboutsoil,Introduction,Whytolearnsoilmechanics?
HongkongBaochengslip,onemorninginjuly1972,neartheBaochengloadinHongKong,twentythousantcubicmitersnativesoilslideontheslope,sobigsildemassjuststrikedatallbuildingcalledBaochengwhichcolidedwithafive-floorbuildingonthewayofitsslide.sosmallbuidlingwasinstantlydamagedanddied67persons.,reason:
Intensionofnativesoilisloweronthehillside,additional,therainwaterinfluentmakeitsintensionlowerandlowermuch,whichleadstheslidingforceofsoilbodyexceedtheintensionofsoil,thusthesoilbodyslidesonthehillside.,Hongkongbuildcityin1900,establishsoilprojectofficein1977Island1972PoShanlandslip(20,000m3)(67die、20injure),PoShanRoad,ConduitRoad,NotewellRoad,Early1972beforelandslip,foundationliquefactionofBanshenglargeearthquake,Shenghudock:
Lateraldeformationandsettlementhappenedaftertheearthquakecausedlarge-areasandysoilfoundationliquefaction.Amassofbuildinghadbeenbrokendownorsufferedseveredamage.,liquefaction:
aphenomenonwhichtheblendingfoundationlosesitsintensionandbecomesinflowagebecauseofvibratingload,Engineeringproblemsaboutsoil,Introduction,Whytolearnsoilmechanics?
foundationliquefactionofBanshenglargee
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