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1、华东交通大学硕士学位论文滑坡防治后滑带土基质吸力特征研究姓名：张卢明申请学位级别：硕士专业：岩土工程指导教师：郑明新20080410AbstractCHARACTERISTICSTUDYONMATRICSUCTIONOFSLIPZONEAFTERLANDSLIDECONTROLABSTRACTRainfallisknownasthemainfactorwhichaffectsthestabilityofslope.Duringtheperiodofrainfall,waterlevelintheslopewillchange,
2、thesuctionandthetemporarywaterpressurewillalsochangewithtimeandrainfal1;Atthesametime,afterconstructedtheanti-slidepiles,retainingwallordrainagestructures,whetherthenatureofslipzoneareimproved?Anti-slidestructuresettingsmaybeaffectthenaturaldrainagechanneloflandslid
3、es,whichleadtothewatertableelevationoflandslide,thenmaybeaffecttheeffectivenessoflandslidecontrol.Thispaperdiscussedthechangeofseepage-fieldinthelandslideonthedifferentconditionsofrainfallinfiltrationandgroundwaterlevelchangeonthesaturated-unsaturatedseepagetheoryan
4、drainfallinfiltration.Onthisbasis,thecontributionofmatricsuctiontoshearstrengthwasconsidered;theobtainedpore-waterpressurefieldsaretheninputintolimitequilibriumanalysisprogramtoevaluatethechangeinfactorofsafebasedontheshearstrengththeoryofunsaturatedsoil.Themaincont
5、entsandresultsofthisresearchasfollowing:Firstly,onthebasisofanalysisofthemoisturecontentwhichimpactsshearstrength,thecontributionofmatricsuctiontoshearstrengthandtheimpactofmoisturecontenttoshearstrengthundergroundwaterlevelchangeswasconsideredbythetheoryofunsaturat
6、edsoilmechanics.Then,improvingontransfercoefficientmethodandsimplifiedBishopmethodwhichappliedtolandslidestabilityanalsisandlandslidethrustvaluecalculation.Secondly,modeltestwaspreceded,thendiscussvariableruleonvolumetricwatercontentandunsaturatedzoneandlandslidesli
7、p,andtesteddisplacementchangeofslidingstructure.Thirdly,basedontheoryofsaturatedseepage,thecontrolequationofunsaturatedseepageisintroduced,andboundaryconditionsaregivenontheconditionofrainfallinfiltration.Analyzedsaturated-unsaturatedseepagefieldandtheporewaterpress
8、ureandvolumetricwatercontentchangeunderwaterlevelfluctuationandrainfallinfiltration,andanalyzedthecontributionofmatricsuctionoflandslidesl
