盾構(gòu)施工對土體擾動與地層移動影響的研究.pdf

1、同濟大學博士學位論文盾構(gòu)施工對土體擾動與地層移動影響的研究姓名：易宏偉申請學位級別：博士專業(yè)：結(jié)構(gòu)工程指導教師：孫鈞19990301ResearchontheDisturbanceofSoilandGroundMovementsInducedbyShieldTunnellingABSTRACTShieldtunnellingdisturbssoilinevitablywhichWOuldresultinsoildeformationCl

2、osedattentioniSpaidtohowtodecreasethede掣eeandextemofsolldisturbanceinundergroundengineeringBythesitetest，semi—anal舛calelementmethodandtheoreticalanalysis，asystematicresearchismadeonthedisturbanceofsoil，groundmovementsand

3、theirrelationshipSomeusefulconclusionsareobtainedinthisthesisThemaincomentofthethesisisasfollows：1Thespecificpenetrationresistanceandtheexcessporepressureareusedtostudythedisturbanceofsoilduetoshieldingtunnellingwhichcan

4、avoidthedisturbanceofsamplingonsoilanditisreliableandfeasible2ThethangingcharacteristicoftheexcessporepressureisanalysedandthespecificpenetrationresistanceismeasuredThatthedisturbanceofsoilvaries謝t11shieldadvancingisconc

5、ludedinthethesisCorrespondinglythepropertiesofsoilwouldchange3Displacementfunctionsofsemianalyticalmethodaredevelopedinsuchawaythatwithdiscmtizationinthelongitudinaldirectionandtheverilealdirectionandanalyticalfunctionsi

6、nthelateraldirection，thethreedimensionalproblemforshieldtunnellingissimplifiedasthetwo—dimensionalmodelThereforetheprocessingworkforsimulationCanbereducedTheproposeddisplacementfunctionscallreflecttheprofileofgroundmovem

7、entsandmeettheboundaryconditionswimcontinuousdisplacementswithinthewholeareaTherelevantformulaeforthesemianalytiealmethodareestablishedandtheelasticplasticconstitutivemodeliSappliedTheprogramisdevelopedtosimulateandanaly

8、sethedisturbanceofsoilandgroundmovementsThecalculatedvatuesareinreasonablygoodagreementwithfieldobservations4ThesemianalyticalmethodisusedtopredictthedisturbanceofsoilandgroundmovementsAccordingtogroundmovementsandtheexc

9、essporepmssuregainedthroughcalculationandsitetest，thedegreeandextentofthedisturbanceofsoilanditsmaininfluencesareresearched，5ThedisturbancemechanismofsoiliSstudied、ⅣitllthestresspathmethodCombinedwiththesimulationandfiel

10、dmeasurementsthedisturbedsoiliSdividedintodifierentzoneswhosecharacteristicsaresummarized6ThecharacteristicofdisturbanceOnsoilanditsjnfluencefactorsaresummedupandcorrespondingcontrolmethodstothedisturbanceofsoilarepropos