基于土性參數(shù)預測土水特征曲線初探.pdf

1、北京交通大學碩士學位論文基于土性參數(shù)預測土水特征曲線初探姓名：王靖安申請學位級別：碩士專業(yè)：巖土工程指導教師：趙成剛20090601ABSTRACrABSTRACTABSTRACl’Alotoflandiscoveredbyunsaturatedsoilsontheearth，andallthesoilsrelatedtoengineeringcouldberegardedasunsaturatedonesTheessentialdif

2、ferencebehveenunsaturatedsoilsandsaturatedonesistheexistenceofsuctioninunsaturatedsoilsSuctionchangeswithwatercontent，andsoilwatercharacteristiccurve(SWCClforasoilisdefinedastherelationshipbetweenwatercontentandsuctionfo

3、rthesoilSWCChasbeenusedasallimportanttoolforpredictingthemechanicalandhydraulicpropertiesofunsaturatedsoils，eg，relativehydraulicconductivitystrength，deformation，stressstateandparticlesizedistributioncurveButitisusuallyve

4、ryexpansiveandtime—consumingtoobtainSWCC，andtheexperimentaldataisdiscreteFromtheangleofbasicphysicalsoilproperties，thispaperexplorestheissueofestablishingtheregressionrelationshipbetweensoilcharacteristicparametersandthe

5、modelofSWCCThemainresearchconclusionsconsisto￡1Thispaperanalyzesthedifferencebetweenunsaturatedsoilsandsaturatedonesfromtheaspectofphases，illuminatesthemicroscopicmechanismofunsaturatedsoilwimthehelpofCapillaryModel，andd

6、escribesthattwostressstatevariablescouldrepresentunsaturatedsoilswell2ThispaperintroducesthepropertiesofSWCC，thereasonsofhydraulichysteresis，andtheconllTlOnmethodstoobtainSWCCThenitdiscussesthesoilfactorswhichcouldinflue

7、nceSWCC，andtheapplicationofSWCCinengineering，suchasshearstrength，hydraulicconductivitydiffusioncoefficient，andadsorptioncoefficient3ThispaperdeducesthefunctionofSWCCbasedONporesizedisiributioncalrveAnditpresentstheconcep

8、tionandphysicalmeaningoftheequivalentcapillaryriseandhowtocalculateit4ThispaperfitstheexistedexperimentaldatawithFredlindXingmodel，andobtainstheparameters釓nandmThenitcalculatestheequivalentcapillaryriseofsoilsamples；andi

9、testablishesregressionrelationshipsof2，3and4independentvariablesbeMeenfunctionparametersandsoilpropertiesofgranular(qo，G，P，kG)andplasticcohesive(嘸，g，e，瓦|P)materials5Thispapercomparesandanalyzestheresultsofvariousregressi