雨课堂学堂在线学堂云《Soil Mechanics（长安）》单元测试考核答案

注：不含主观题目录：Chapter2IndexPropertiesofSoilandSoilClassificationChapter3SeepageThroughSoilsChapter4StressinSoilMassChapter5CompressibilityofSoilChapter6ShearStrengthofSoilChapter7EarthPressureonRetainingStructuresChapter8SoilSlopeStabilityChapter9BearingCapacityofSoil第1题Forcoarse-grainedsoils,whichofthefollowingindexpropertiescontroltheirmechanicalproperties?()ASensitivityandactivityBPlasticityindexandliquidityindexCDegreeofsaturationandwatercontentDGrainsizedistributionanddensity第2题Theparameterusedtocontrolthequalityofcompactioninthefieldis()AOptimumwatercontentBMaximumdryunitweightCDegreeofsaturationDDegreeofcompaction第3题Forasand,giventhatemax=2,emin=0.5,e=0.75,itsrelativedensityis()A0.83B1.1C0.9D1.2第4题Forfine-grainedsoils,withincreaseofwatercontent,whichofthefollowingwillalsoincrease?()ALiquidlimitBPlasticlimitCPlasticityindexDLiquidityindex第5题Whichofthefollowingindexpropertiescannotbedetermineddirectly?()ADensityBSpecificgravityCVoidratioDWatercontent第6题Thefabriccommonlyseenincoarse-grainedsoilsis()ASingle-grainedfabricBDispersedfabricCFlocculatedfabricDJointfabric第7题Forthesamesoil,increasingthecompactionenergywillleadto()AIncreaseofmaximumdryunitweightANDoptimumwatercontentBIncreaseofmaximumdryunitweightBUTdecreaseofoptimumwatercontentCDecreaseofmaximumdryunitweightandoptimumwatercontentDIncreaseofoptimumwatercontentBUTdecreaseofmaximumdryunitweight第8题Forasaturatedsoil,givenitswatercontentw=50%,thenitsvoidratioe=().AssumethespecificgravityGs=2.7.A1.35B1.15C1.25D1.05第9题Asoilhasaunitweightof18.0kN⁄m3andawatercontentof8%.Itwasdecidedtocompactthissoilinahighwayembankmenttoadryunitweightof20.0kN⁄m3atawatercontentof10%.If10000m3ofcompactedfillisrequired,thetotalvolumeofthe(original)soilrequiredpriortocompactionwillbe()A10000m3B11000m3C12000m3D13000m3第10题Soilisathree-phasematerialthatconsistsofsolidparticles,____and____fillingthevoidsbetweensolidparticles.正确答案：:air正确答案：:water第11题Ingeotechnicalengineering,____and____areequallyimportantasfundamentalsofsoilmechanics.正确答案：:fieldobservation正确答案：:engineeringjudgement第12题Watercontentisdefinedastheratioof____to____inagivenvolumeofsoil.正确答案：:theweightofwater正确答案：:theweightofsolidparticles第13题Ifmorethan50%ofsoilparticlesaregreaterthan0.075mm,thesoiliscalled____;andifmorethan50%ofsoilparticlesaresmallerthan0.075mm,thesoilisnamed____.正确答案：:coarse-grainedsoil正确答案：:fine-grainedsoil第14题Forafine-grainedsoil,itswatercontentisw=55%,plasticlimitisPL=32%,andliquidlimitisLL=50%.Itsplasticityindexis____(%)anditsliquidityindexis____.正确答案：:18正确答案：:1.28第15题Themassofamoistsoilsamplecollectedfromthefieldis465g,anditsovendrymassis405.76g.ThespecificgravityGsofthesoilsolidswasdeterminedinthelaboratorytobe2.68.Ifthevoidratioofthesoilinthenaturalstateis0.83,thewatercontentofthesoilis____%,themoistunitofthesoilis____kN/m3;thedryunitweightofthesoilis____kN/m3.正确答案：:14.6正确答案：:16.5正确答案：:14.4第16题第1题InBernoulli'sEquation,thetotalheadinclude____,____,____.正确答案：:Pressurehead正确答案：:elevationhead正确答案：:velocityhead第2题Methodstoobtainthecoefficientofpermeabilityinclude____,____,____.正确答案：:Laboratorytests正确答案：:fieldtests正确答案：:empiricalequations第3题Thevelocitythroughthevoidspacesiscalled____.正确答案：:Seepagevelocity第4题Theconstantheadtestisusedprimarilyfor____soils.正确答案：:Coarsegrainedsoil第5题Thefalling-headtestisusedfor____soils.正确答案：:Finegrainedsoil第6题Theseepageforceisproportionaltothe____withthesamedirectionas____.正确答案：:Hydraulicgradient正确答案：:seepagedirection第7题Aflownetisagraphicalrepresentationofaflowfieldthatsatisfies____,andcomprisesafamilyof____and____.正确答案：:Laplace’sequation正确答案：:flowlines正确答案：:equipotentiallines第8题Darcy’slawisvalidfor____.正确答案：:

laminarflow第9题Thecoefficientofpermeabilityofunsaturatedsoils____rapidlywiththedegreeofsaturation.正确答案：:increases第10题

Laboratorytestsarenotgenerallyveryreliablebecauseof

____,____,____,____,____.正确答案：:Soildisturbance正确答案：:Sizeeffect正确答案：:Stressrelief正确答案：:Airbubbles正确答案：:TemperaturevariationsChapter4Assignment第1题Thestressstateofsoilelementcanberepresentedas____inσ-τplane.正确答案：:Mohrcircle第2题Thestressatanyplaneinsoilelementcanbeobtainedusing____and____.正确答案：:2θmethod正确答案：:Polemethod第3题Theeffectivestressisthedifferencebetweenthe____and____.正确答案：:Totalstress正确答案：:porewaterpressure第4题Theeffectivestressrepresentstheaveragestresscarriedbythe____.正确答案：:soilsolids第5题Deformationsofsoilsareafunctionof____.正确答案：:effectivestress第6题Downwardseepage____theeffectivestress;upwardseepage____theeffectivestress正确答案：:increases正确答案：:decreases第7题Stresscausedbyapointloadcanbesolvedbyusing____.正确答案：:Boussinesq’ssolution第8题Therisesofwatertablewill____theeffectivestress,andthefallingofwatertablewill____theeffectivestress.正确答案：:Decrease正确答案：:increase第9题Thehydraulicgradientleadtozeroeffectivestressiscalled____.正确答案：:Criticalhydraulicgradient第10题Thestressincreaseduetoverticalexternalloadwithanyshapecanbeobtainedby____.正确答案：:integrationofBoussinesqequationChapter5Assignment第1题Thecompressibilityofsoilcanbecharacterizedbycoefficientofcompression,Whichofthefollowingistrue?()AThegreater,thelowerthecompressionofsoilwillbe.BThegreater,thehigherthecompressionofsoilwillbe.CTheisindependentofthecompressibilityofsoil.DNoneoftheaboveistrue.第2题Underwhatexperimentalconditionsisthee-pcurveofsoilcompressibilityobtained?()AUnderzerolateralstrainconditionBUnderunconfinedconditionCUnderpartialconstrainedconditionDNoneoftheaboveistrue.第3题Whatistherequirementforhighcompressiblesoils?()ABCD第4题Whenthesoilisoverconsolidated,whatistherelationshipbetweenthepreconsolidationpressureandthepresenteffectiveoverburdenpressure?()ABCDNoneoftheaboveistrue.第5题Therearetwotypesofdrainageconditionforsomeclaylayer,whichthethicknessis4m.Onecaseistwo-waydrainage,theotherisone-waydrainage.Whenaninfiniteuniformlydistributedloadisappliedtothegroundinstantaneously,thesoilpropertiesarethesameinbothcases,andaveragedegreeofconsolidation.Whatisthedifferenceinthetimeneededtoreachthesamedegreeofconsolidation?()A2timesB4timesC8timesD16times第6题Inthisequationoftimefactor,whatdoesHdrmean?()AThelongestverticaldrainagedistanceBThethicknessofsoillayerCHalfthethicknessofsoillayerDNoneoftheaboveistrue.第7题Whatisthemainreasonforthecompressiondeformationofsoil?A

CompressionofsolidparticlesBCompressionofwaterCExpulsionofporewaterleadstothedecreaseofvoidvolumeDNoneoftheaboveistrue第8题Whenthesettlementoffoundationiscalculatedbylayer-wisesummationmethod,whichkindofstressisusedtoexpressthestressincreasedistribution?A

TotalstressB

PorewaterpressureC

EffectivestressDSelf-weightstress第9题

Atthemomentofapplyingloadonsaturatedcohesivesoil,whobearsallthestressincreaseinthesoil?ASoilskeletonB

PorewaterC

BothsoilskeletonandporewaterD

Noneoftheaboveistrue.第10题

Whatistheratioofverticalstresstoverticalstrainforsoilunderzerolateralstraincondition?AConstrainedmodulusofcompressionB

DeformationmodulusC

Young’smodulusD

Coefficientofcompression第11题

Whereshouldthesettlementofbuildingfoundationbecalculatedfrom?A

NaturalgroundBOutdoorgroundC

IndoorgroundD

Baseofthefoundation第12题Whatistherelationshipbetweenthedegreeofconsolidationandthemagnitudeoftheappliedload?AThegreatertheload,thegreaterthedegreeofconsolidationB

Thegreatertheload,thesmallerthedegreeofconsolidationC

ThedegreeofconsolidationofsoillayerisindependentoftheloadDNoneoftheaboveistrue.第13题

Whenthedegreeofconsolidationofclaylayerreaches100%underexternalload,istherestillfreewaterinthesoil?A

Onlyabsorbedwater,nofreewaterB

Thereisbothabsorbedwaterandfreewater.C

Thereisbothabsorbedwaterandcapillarywater.DOnlycapillarywater,nofreewater第14题

Whatisthemostsignificantfactoraffectingthecalculateddepthoffoundationsettlement?AStressatthebaseofthefoundationB

SizeoffoundationbaseC

ConstrainedmodulusofcompressionofsoillayerD

Burieddepthoffoundation第15题Astofoundationsettlementcalculatedbylayer-wisesummationmethod,howmuchisthecorrespondingdegreeofconsolidation?A

0%B

30%C

50%D

100%第16题Usually,thetotalsettlementoffoundationiscomposedof____,____,____正确答案：:immediatesettlement正确答案：:primaryconsolidationsettlement正确答案：:secondaryconsolidationsettlement第17题Whencalculatingthesettlementusinglayer-wisesummationmethod,thedepthofcompressiblelayerisdeterminedbytheratioof____to____.正确答案：:theverticalstressincrease正确答案：:theeffectiveoverburdenpressure第18题Accordingtotheoverconsolidationratio,thesoilscanbedividedintothreeconsolidationstatesincluding____,____,____.正确答案：:normallyconsolidated正确答案：:overconsolidated正确答案：:underconsolidatedChapter6Assignment第1题____isthesimplestandthemostpopularmodelusedtoevaluatetheshearstrengthofsoils.正确答案：:Mohr-Coulombmodel.第2题InMohr-Coulombfailurecriterion,failureoccurswhenthe____isachievedandnotwhenthemaximumshearstressisachieved.正确答案：:maximumprincipaleffectivestressratio/maximumeffectivestressobliquity/maximumσ’1/σ’3.第3题Foragivenmajorprincipalstress,ifitscorrespondingminorprincipalstressequalscalculatedminorprincipalstressatcriticalstate,thesoilisunder____state.正确答案：:Critical.第4题Indirectsheartests,theshapeofasoilspecimencanbe____or____.正确答案：:Square,.正确答案：:circular第5题Indirectsheartests,thereisnocontrolofporewaterpressure,anditsdrainedandundrainedarecontrolledby____.正确答案：:Shearingspeed.第6题Indirectsheartests,specimensareforcedtoshearalong____plane.正确答案：:apre-determined/middle.第7题Intriaxialtests,cellpressureisappliedviathemediaof____.正确答案：:Water.第8题Intriaxialtests,____conditionsand____conditionsareusedtoclassifydifferenttypesoftests.正确答案：:Consolidation正确答案：:drainage第9题Intriaxialtests,whendrainageisopenatconsolidationstage,itsconsolidationconditionis____(Consolidated/unconsolidated).正确答案：:Consolidated.第10题InCU(Consolidated-Undrained)triaxialtests,specimensareshearedinundrainedcondition,thevolumeofspecimensare____duringshearing.正确答案：:Constant.第11题Bvalueisusedtocheckifthetestspecimenissaturated,itis____forfullysaturatedsoils.正确答案：:1第12题Iftheconstructionoffootingwasforcedtostopduetosomeunexpectedfactors,tocatchuptheschedule,theconstructionneedstobeaccelerated.Therewouldbeconsolidationbutnodrainage,accordingly____testresultscanbeapplied正确答案：:CU第13题Cohesionof

non-cohesivesoilis____正确答案：:0第14题InCD

(Consolidated-Drained)triaxialtests,specimensareshearedindrained

condition,porewaterpressureis____.Itcanbeusedtoevaluate

the____(long-term/short-term)steadyseepageofembankmentdams.

正确答案：:0正确答案：:long-term第15题Forsaturated

samples,alltestspecimenswillhavethesameshearstrengthsinceno

consolidationisallowed.Therefore,undrainedfrictionangleforsaturated

clayis

____.

正确答案：:0Chapter7Assignment第1题Whenaretainingwallmovestowardsoils,____(active/passive)conditionisdevelopedinthesoils.正确答案：:Passive第2题InRankine’searthpressuretheory,soilishomogeneousandisotropic,failuresurfaceisa____.正确答案：:Plane第3题InRankine’searthpressuretheory,interfacebetweenthewallandsoilis____.正确答案：:Frictionless/smooth第4题Inthediagramofactiveearthpressureoffine-grainedsoil,thereisanon-contactzonewheresoilisnotincontactwiththewall,asaresult,thereis____lateralearthpressureinthissection.正确答案：:No第5题nCoulomb’searthpressuretheory,aconditionoflimitequilibriumexistsina____betweenaretainingwallandatrialslipplane.正确答案：:Soilwedge第6题Wallfrictioncausestheslipplanesinboththeactiveandpassivestatestobecurved.Thecurvatureintheactivecaseis____(smaller/greater)thanthatinthepassivecase.正确答案：:Smaller第7题InCoulomb’searthpressuretheory,forthepassivestate,Kpis____(overestimated/underestimated)whichisunsafeforalldesignpurposes.正确答案：:Overestimated第8题InthecalculationofslipsurfaceusingCoulomb’searthpressuretheory,slipsurfaceissimplifiedtoa____slipsurface.正确答案：:Planar第9题ComparedwithRankine’searthpressuretheory,Coulomb’searthpressuretheoryconsidersmorefactorssuchas____,____,and____.正确答案：:Theinclinationofbackfaceoftheretainingwall正确答案：:wallfriction正确答案：:slopeofthebackfill第10题Rankine’sactive/passivepressurecoefficientapplieson____(water/surfacestresses),anddoesnotapplyon____(water/surfacestresses).正确答案：:Surfacestresses正确答案：:water第11题Inthecalculationoflateralearthpressure,theratioσh’/σv’isaconstantknownas____

coefficientofearthpressureat-rest.正确答案：:K0第12题Inpassivecondition,σh’____(increases/decreases)tillfailureoccurs.正确答案：:Increases第13题Inactivecondition,σh’____(increases/decreases)tillfailureoccurs.正确答案：:Decreases第14题WhenRankine’searthpressuretheoryisappliedinactiveconditionofcoarse-grainedsoil,itsslipplaneis____tohorizontal.正确答案：:45°+φ’/2第15题WhenRankine’searthpressuretheoryisappliedinpassiveconditionofcoarse-grainedsoil,itsslipplaneis____tohorizontal.正确答案：:45°+φ’/2Chapter8Assignment第1题Oneimportantinternalfactorthatinducedthefailureofsoilslopesistheincreasingofthe____ofthesoilanddecreasingof____aboutsoil.正确答案：:Watercontent正确答案：:shearstrength第2题Astoasandyslope,whentheslopeangleis____theinternalfrictionangle,itisinastablestate.Whenthesandyslopeisinanaturalstablestate,theultimateslopeangleiscalled(angleofrepose.)正确答案：:lessthan第3题inthecohesivesoilslopestabilityanalysis,engineersoftenusethefollowingmethods:____,(felleniusmethodor____),bishopmothedandfiniteelementmethod.正确答案：:Swedisharcmethod正确答案：:Swedishmethodofslices第4题forahomogeneoussandyslope,theinternalfrictionangle,thedesignrequirementisthatthefactorofsafetyK>1.25,sothereasonableslopeangleshouldbe()ABCD第5题Thecriticalfailuresurfaceinsoilslopepointsto()AthesurfacewithmaximumdrivingforceBthesurfacewithaminimumfactorofsafetyCthesurfacewithminimumresistingforceDthesurfacewithshortestslipdistance第6题TheSwedishmethodofslicesisasimplifiedmethodthatignoretheinterslicesforces,whichofthefollowingconditionitdoesn’tsatisfy?(

)

ATheequilibriumoftheslipsurfaceBtheequilibriumofthemomentforthewholeslopeCthestaticforceequilibriumbetweensoilslicesDthecalculationerrorrequirementinsmallengineering第7题第8题Theangleofreposeequalstotheinternalfrictionangleforaloosesandyslope.第9题Thefactorofsafetyisthelowestimmediatelyafterthecompleteofconstruction,anditgrowsupwithtimegoesby.第10题Thestabilityofacohesivelessslopemainlydependsonthe()AslopeheightBslopeangleCslopeheightandslopeangleDslopeangleandthesoilproperty第11题Thestabilityofsandyslopeshavenoconnectionwith()AslopeangleBslopeheightCinternalfrictionangleDslopeangleandinternalfrictionangle第12题Whenthesoilslopeisinanequilibriumstate,thefactorofsafety()Aislargerthan1Bislessthan1Cequalsto1Dequalsto0第13题whenanalyzingtheslopestabilitybymethodofsliceswithfelleniussolution,theassumptionsabouttheinterslicesforcesare()Aequalinmagnitude,linesofactionsameBequalinmagnitude,linesofactioncoincideCunequalinmagnitude,linesofactionsameDequalinmagnitude,linesofactionsame,theactionpointisonthe1/3ofthesliceheight.第14题thefactorofsafetyofcohesivesoilslopesaredefinedas()AresistingmomentoverdrivingmomentBdrivingmomentoverresistingmomentCslopeangleoverinternalfrictionangleDcohesionoverdrivingforce第15题whenthewaterleveldecreasesfromhightolow,thebankslopestability()AdecreaseBunchangedCincreaseDuncertainChapter9Assignment第1题ontheload-settlementcurve(P-Scurve)obtainedfromtheplateloadtest,whichwhenthefoundationsoilisabouttofail,the