北航《土力学与基础工程》在线作业一（buaa soil mechanics and foundation engineering online homework）

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1、北航《土力学与基础工程》在线作业一（BUAAsoilmechanicsandfoundationengineeringonlinehomework）BUAA"soilmechanicsandfoundationengineering"onlinehomeworkTotalscore:100testtime:-RadioexaminationJudgmentquestionThereare20questions(80points)1.thepurposeoffoundationtreatmentdoesnotincludewhichofthefollowingA.imp

2、rovestheshearstrengthofsoilB.improvestheengineeringpropertiesofsoilC.reducesthecompressibilityofthesoilD.reducessoilwaterpermeabilityFullmarks:42.whatkindofsoilissoakedbywater,thestructureofsoilisdestroyedrapidly,andthestrengthisreducedrapidly()A.expansivesoilB.frozensoilC.redclayD.coll

3、apsibleloessFullmarks:43.thefollowingfactorshavethemostsignificantinfluenceonthecalculationdepthoffoundationsettlementA.substrateadditionalstressB.foundationgroundsizeModulusofcompressibilityofC.soilBurieddepthofD.FoundationFullmarks:4Theconditionof4.wellgradedsoilshouldbesatisfied(Cuis

4、inhomogeneouscoefficient,Cciscurvaturecoefficient)()A.Cu<5B.Cu<10C.Cu>5D.Cu>10Fullmarks:45.underthesameloadcondition,theslowestconsolidationrateofsinglesidedrainagesoilwiththesamethicknessis:()A.cohesivesoilfoundationB.crushedstonefoundationC.sandysoilfoundationD.siltysoilfoundationFull

5、marks:46.thecodeoffoundationstipulatesthatthelengthofpilecapembeddedinpilecapshallnotbelessthan()A.30,mmB.40,mmC.50,mmD.60,mmFullmarks:47.theaveragevalueofplasticityindexforasoillayeris18.9,andtheaveragevalueofliquidindexis0.49.Thesoillayershouldbenamedas()A.plasticclayB.bulksiltysoilC.

6、plasticclayD.softplasticsiltyclayFullmarks:48.theadditionalstressofapointinthefoundation(fullysaturated)is100kPa.Afteraperiodofload,theporewaterpressureofthepointismeasuredtobe30kPa,thentheeffectivestresscausedbyadditionalstressis()A.30kPaB.50kPaC.70kPaD.100kPaFullmarks:49.,themostimpor

7、tantfactorinsoilshearstrengthis().A.shearrateB.stresshistoryC.drainageconditionD.stressstateFullmarks:410.whenthedynamiccompactionmethodisusedtotreatthefoundation,thesettlementistoolargewhenthetampingsettlementistoolargeA.giveuptherammerB.fillsandC.reducetampingpointdistanceD.r