云南新平芭蕉树滑坡工程地质特征及成因机理研究

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1、西南交通大学硕士学位论文云南新平芭蕉树滑坡工程地质特征及成因机理研究姓名：李传宝申请学位级别：硕士专业：地质工程指导教师：程谦恭20070401西南交通大学硕士研究生学位论文第lI页AbstractBajianshulandslide，whichhappenedat8：30，on14tbofAugnst，2002，waslocatedinXinping,YunnanProvince．ThelanslidedestroyedtheVillageofBajiaoshu，with8diedand3lost．

2、Inthispaper,BajiaoshulandslideWasstudied．BasedOIlin-sitegeologicalsurveyandtheanalysisofgeologicaldata,engineeringgeologycharacteristicsoflandslidewereexpatiatedparticularly,andgeo-mechanicalmodeloflandslideWasproposed．Physicalparametersofmainrockswcreo

3、btainedbyrocktestsandgeologicalallalogism．TheimpactOnslopestabilityofundergroundwaterwasanalysedbylimitequilibriummethod．Andthestartingvelocityunderwater-cushioninfluenceandmaximalslidingvelocityweregainedbyEnergyConservationTheory．Propertiesofstress,di

4、splacementandtheextensionoffailedregionsoftheslopebothundernaturalstateandinrainstormstage,werecalculatedbyFLACinthispaper．TheprimalslopeofBajiaoshulandslide，whichWasconsequentslpoe，Wascomposedofbiotite-plagioclasegneiss,whilepaperydolomiteschistexisted

5、asapieceofinterlayer．Thecompositionofslopewasprovidedwiththethree-plypropertyofuphard-mid∞n．dm阳hardasapieceofhamburger．Theuphardrocknlhasscouldeasilyslipcreeplyalongthesoftlayer,whichledcrackoccuringintheupsideofslope．ThedeformationofslopeWasrestrainedb

6、yformerhardrockmass,whichactedasalockedsegment。be．,v．擅usethesoftlayerdidn’tcontacttheaiLSoageo-mechanicalmodelofupsidefracturing-midsliding-underlucking-upWasintroducedtoBajiaoshulandslideinthispaper．ThelandslideWascontrollednotonlybyspecialcompositiono

7、fmaterial,butalsomechanicalcharacteristicsandinterfacesofrockmass．Undertheactionofgravity,theslopedeteriorated肿du枷y．Rainstormgeneratedhighporewaterpressureinback-crackandsoftlayer,whichtriggeredthelandslide．Theresultsoflimitequilibriummethodshowedthatth

8、eslopeWasstablewithoutconsiderationoftheactionofundergroundwater,buttheslopefailedwhiletakingtheinfluenceofunder孽oundwaterintoaccount．ThevelocityatthetimeofslidingmassshearingoutandthemaximalvelocitywereobtainedbyEnergyConservati