真空动力固结加固大面积吹填土路基试验研究英文.docx

In-situtestsonvacuumdynamicconsolidationtoimproveahydraulicfillgroundZHOUJian1,SUYan1,2,JIAMin-cai1,LIUYang1(1.GeotechnicalDepartmentofTongjiUniversity,Shanghai200092,China;2.CivilengineeringInstituteofFuzhouUniversity,Fuzhou350002,China)Abstract:TheapplicationofvacuumdynamicconsolidationmethodtoimprovealargehydraulicfillgroundinShanghaiwaspresented.Thevariationsofgroundwatertableandexcessiveporewaterpressureduringandaftertheexecutionoftheimprovementweremonitored.Basedonthefieldobservations,theunderlyingmechanismofvacuumdynamicconsolidationwasproposedandthecriteriafordeterminingtwocrucialparametersoftheimprovementwerediscussed.Thisstudyverifiedthefeasibilityofthevacuumdynamicconsolidationmethodtoimprovelargeareagroundswithhydraulicfills,suchasthoseatwharvesorharborsincoastalareasorhighwayconstructions.Keywords:dynamicconsolidation;vacuumdewatering,groundfoundationimprovement;hydraulicfillsArticleID:1000-4548(2005)09-1091-06CLCnumber:TU411Documentcode:ABiography:ZHOUJian(1957–),male,professor,Ph.D.Hehasbeenengagedinfoundationtreatmentandgeotechnicalnumericalcomputation.EMMLL)41，11，2，1,1，IJ11(1.tthI±2000922.II*III350002)摘要：±ItITEMMLLLiLtthT*L11L*T3L11I*HtTEMML±thtLW*TTEMMLtttLiiLTJTO关键词：MLEM;Tt0IntroductionDynamiccompactionmethod,firstlyproposedbycompactionanddrainswateroutfromthesoil.Thenthestrengthofgroundsoilswillbesignificantlyincreased.Satisfactoryperformanceofthismethodtostabilizesoftsoilswasachievedatthefourthandfifth-phaseprojectoftheWaigaoqiaowharfinShanghai.However,itwasthefirsttimetoapplythismethodtostabilizealargehydraulicfilledgroundwithalayeredsaturatedsoftclay.Fieldobservationwasconductedduringtheexecutionofthismethod.Theresultsfromthefieldobservationwillbepresentedinthispaperwithanemphasisonexecutionprovisionsanditsperformance.Subsequently,themechanismunderlyingtheimprovementofthehydraulicfillisproposed.MenardInc.ofFrancein1969,isoneofengineeringmeasurestoimprovesoils[1].Ithasbeenwidelyusedtocompactcrushedstones,silts,loess,hydraulicfills,etc.duetoitss