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页数:7页
时间:2019-11-14
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1、-^.Explorationshouldbecarriedouttoadepthwhichincludesallstratalikelytobesignificantlyaffectedbythestructuralload.Experiencehasshownthatdamagingsettlementdoesnotusuallytakeplacewhentheaddedstressinthesoilduetotheweightofastructureislessthan10%oftheeffectiveoverburdenstress・勘探深度应包括可能受结构荷载影响较人的所冇地层
2、。经验表明,当因建筑物重量而产主的土的附加应力不到有效覆盖应力的10%时,一般不会发生破坏性沉陷。注释:1.likelytobesignificantlyaffectedbythestructuralload:不定式作allstrata的定语。不定式用作定语有两种情况比较普遍,一是用在一定的句型中,一是用在某些特定名词Z后。这里属前种情况。2.takeplace:发生,举行。3.dueto:由于,归因于。due是名词,应得物,应得权益。4.lessthan:less(little的比较级),than:连接词,LLolessthan是由than引起的状语从句。Thesimplestfor
3、mofinsitudensitytestisthereplacementtest.Asuitableareaofgroundischosenandleveled,andaholeisexcavatedbyhandandthespoilisweighted.Whenasuitablequantityhasbeendugout,theholeisfilledwithstandardsandfromasandpouringcontainer,thevolumeofsandbeingcalculated.Withtheweightandvolumeofthesoildetermined,the
4、densitycanbecalculated.最简单的现场密度试验方法是置换试验。选择一块适合的地面并加以平整,然后用手工挖掘一个孔洞,称虽挖出的土的重量。当已挖出适量的土时,用砂灌注器将己计算出体积的标准砂充填孔洞。根据土的重量和体积,可以计算出密度。注释:1.insitu:situ(拉丁语),insitu原地,在(施工)现场。2.withstandardsand:介调短语作状语,with(说明表示动作的词)用,以,借助。3.thevolumeofsandbeingcalculated:现在分词的被动形式作定语。beingcalculated为thevolumeofsand的定语,例
5、如:Beingprotectedbyathickwall,theyfelttheywerequitesafe.i堵厚墙掩护着,他们感到很安全。二•Geotechnicalengineeringisabranchofcivilengineeringthatisconcernedwiththeusesofsoilandrockasmaterialsofconstruction(Reese,1977;Hunt,1983).TheAmericanSocietyofCivilEngineers(1978)definesgeotechnicalengineeringas“thatpartcivil
6、engineeringinvolvingtheinterrelationshipbetweenthegeologicalenvironmentandtheworksofman."Thetermgeotechnics.orgeotechnique,hasbeenincommonuseinEuropeandSouthAmericaformanyyears・OnlyrecentlyhasitbecomeaccentedintheUnitedStates.ItwasadoptedbytheAmericanSocietyofCivilEngineersin1974asareplacementfo
7、rthe“SoilMechanicsandFoundationEngineeringDivision^togiveabroaderconnotationtothedisciplineandparticularlytoencompassthesubjectofrockmechanics・Thetermsoilmechanicsandfoundationengineeringisstillusedmorecommonlyasthetitleofma
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