土工格柵加筋膨脹土邊坡的效果分析.pdf

1、武漢理工大學(xué)碩士學(xué)位論文土工格柵加筋膨脹土邊坡的效果分析姓名：施戈亮申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：巖土工程指導(dǎo)教師：孫吉主20090501AbstractLargescalepull—outtestsareadoptedfirsttostudythefrictionalcharateristicsofgeogridandexpansivesoil，andasimplifiedinterfacemodelofgeogridandcompacte

2、dexpansivesoilissuggestedandtherelatedparametersaregivenBasedonthetriaxialtestresultsFLAC3Disappliedtonumericallyanalysizestressanddeformationoftheexpansivesoilslopewithsloperateof1：1andheightof20mTheeffectofgeogriddistr

3、ibution，moistureabsorptionandweatheringonslopereinforcementandstabilityisdiscussed，someimportantresultsandconclusionsareasfollows：(1)Theinterfacefrictionalforcecarlreachpeakvaluewhenthedisplacementofgeogridrelativetosoil

4、arrivesat1～2era，andnoclearsofteningoccurredafterpeakfrictionThecurvesofaveragefrictionforceandrelativedisplacementatinterfacerepresentelasticperfectlyplasticbehaviors(2)Thewatercontentofexpansivesoilhasgreatinfluenceonth

5、einterfacequasi—cohesionwhichsharplyreducesaustheincreaseofwatercontentbutnotonquasifrictioncoefficientThedrydensitysignificantlyimpactsontheinterfacequasifrictioncoefficient，butnotonquasi—cohesionTheinterfacequasi—frict

6、ioncoe伍cientincreasesastheincreasesofdrydensity(3)GeogridshouldpenetratetheweatheredlayerotherwisethereinforcementeffectisnotremarkableWhengeogridexceedsthedepthofweatheredlayertoincreasethelengthofgeogridCallraisetheres

7、trictionofstressanddisplacementThesafetyfactorofslopeisraised52％，andcriticalslipsurfacemovestowarddeepzoneofslope(4)Whengeogridreachestheboundaryofweatheredlayerthestressstateofreinforcedzoneisremarkablyaffectedbyvertica

8、lintervalsofgeogridsTheshearstressofreinforcedzonereduceswiththedecreaseofgeogridverticalintervalsAndthehorizondeformationofslopereducesComparedwithuntreatedslope，thesafetycoefficientofslopeswithgeogridverticalintervalof