橋頭引道沉降標(biāo)準(zhǔn)及臺背回填加筋應(yīng)用研究.pdf

1、同濟(jì)大學(xué)交通運(yùn)輸工程學(xué)院博士學(xué)位論文橋頭引道沉降標(biāo)準(zhǔn)及臺背回填加筋應(yīng)用研究姓名：馮光樂申請學(xué)位級別：博士專業(yè)：道路與鐵道工程指導(dǎo)教師：許志鴻凌天清20021201Abstract“Bumponbridgeapproach”isageneralprobleminhighwaysandbndges，causedbydifferentiaIsettlementsbetweenthebridgeabutmentandapproachingroa

2、dwayItnotonlyhasanadverseeffectontraveIspeedandcomfort，butalsodamagestheabutmentjointsandjointface1tmayevenresultjnt陷ffjcaccidentsMyresearchonthisproblemfocusesontwofundamentaIaspects：1ThecrteriaofsettlementcontroIattheb

3、ridgeapproaches；2ThetechniqueofsettlementcontroIatthebridgeapproachesThisstudyiSnecessaryandofgreatpracticalvalueTostudythecriteriaofsettlementcontroIatthebndgeapproaches1combinedthepracticalfunctionwiththestructuraIfunc

4、tiontoanalyzethecritedaWhenstudyingthepracticalfunction。Iadoptedbothobjectiveandsubjectiveevaluation，thatiS，setupa“1／4vehiclemodel”。referredtotheverticalaccelerationintheevaluationofvehiclesmoothrunning。anddeducedthelong

5、itudegradecriteriaofpavementirregularityFuzzyjudgmentisadoptedinthesubjectiveevaluationInaddition，thelongitudegradedifferenceiSverifiedinaccordancewithPSICritedoninAASHTequirementsWhenstudyingthestructuraIfunction1usedbo

6、ththeoreticaIapproachandfiniteelementanalysesrespectivelyindgidandflexiblepavementTheadditionalstressinpavementstructureiSfuIlydiscussedwhichiScausedbydifferentiaIsettlementTherefore。theIimitofIongitudegradedifferencecan

7、beconfirmedbytheIimitofflexuretensilestressofmaterials‘Myresearchontheapplicationofgeotextilereinforcedsoil(GRS)atbridgeapproachesfocusesonfivepointsasfollows：1)Themechanicalpedormanceofgeosyrntheticsandtheinteractionofg

8、eosyntheticsandsoilThestressdeformationrelationwastestedbydireCtextensiontestequipmentBasedonthestressstraincurve，IcalculatedmechanicaIndexes，suchastensilestrength，tensilemodulus，extensionratio，etcDirectsheartestwascarri

9、edoutbyIargescaledirectshearapparatus。whichtestedtheintedaceshearstrengthandtherelationofintetraceshearandrelativedisplacementofgeotextileandfillerbehindthetestabutmentattheSichuanMianyang—GuangyuanexpresswayThattestprov

10、ideddatafornumericalanalysisandstructuraIanalysis幼ThemechanismofGRSatbridgeapproaches，BycentrifugalmodeltestIstudiedthesettlementanditsregularityatGRSbridgeapproacheswithdifferentplacementandcompactness。whichcanbereferre