加筋陡坡模型试验与复合单元分析研究

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1、分类号TU457密级Y856585单位代码10618学号03340206重庆交通大学硕士学位论文论文题目：加筋陡坡模型试验与复合单元分析研究OnReinforcedSteepEarthSlopes导师姓名、职称，何光春教授重庆交通大学申请学位级别专业名称：论文答辩日期学位授予单位水工结构工程答辩委员会主席评阅人2006年4月日ABSTRACTAccordingtoaScience＆TechnologyProjectofCommunicationsDepartmentofGuangdongProvince，thefieldexperi

2、mentof12m-highsteppedgrogridRSRWisperformed．Theexperimentmodeltestingattheratioof1：1．05andthenumericalcalculationwithcompositeelementarecarriedout．ThemainpointsaresummarizedaSfollows：1．Accordingtothetheoryofcompositemedium，theelasticmatrixandPosson’Sratio眦obtainedbyreg

3、ardinggeogridandearthascompositematerialandregardingreinfoIcedearthasalternateorthogonallaye墙．Strainconsistencyconceptionisintroducedintoaccordingtothestructuralcharacteristicsofgeogridreinfowmlsteepslope．Theelasticmatrixofgeogfidcompositematerialisproposedbased0nalter

4、nateoRhogonallayers．ThentheFEMcalculationmodelofcompositeelementofreinforcedsteepslopeisobtained．TheinnerstressfieldanddisplacementfieldofreinforcedesMhstructureCanbeobtainedbycalculation．ThentheworstlocationandthefailuresurfaceCanbeconfirmedeasily．2．Bymodelexperimenta

5、ndFEManalysisofcompositeelement。itc觚beconcludedthatthefactorwhichaffectsthehorizontaldisplacementisgeogridwhilethefactorwhichaffectstheverticaldisplacementisthetoploadandfillingunitweight．3．TheeffectiveshearstressandcompressivestressiⅡgcogridsteepsiopeamla喀einloadscope

6、．Thephenomenonofstressconcentrationappearsillthejointsofstepsinmodeltest1andmodeltest2．Itisharmfultothestabilityanddeformationofsteepslope．ThepressureinthetiltinghereislargeandthisaIP掏tislikelytobeplasticafea．TheeffectiveshearstressandcompressiveSU'eSSiIlgeogridsteepsl

7、opearelargeneartheplanetclosedtOloadandthisa规islikelytobeplasticarea．4．ThegeogridpullcalculatedbyFEMisass越l-leasittestedbymodelexperiment．Thepulldistributionisunevenalongthebeltlength．Tosteppedgeogridsteeps10pe．thepotentialfracturedsurfacewhichisdrawnbythemaximumgeogri

8、dpullisnotthe881measthe0．3H-methodillCode．Itislikelytobelogarithmicspiralcurve，andthestarpointofthecurveisnotatthefro