堆载作用下既有桥梁群桩基础承载特性分析-(5738)

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1、万方数据西南交通大学硕士研究生学位论文第1I页部结构沉降变形自动化监测系统，分析了各桥墩基础沉降变形变化规律，评估了其服役状态：为服务线路运营安全发挥了重要的指导作用。关键词：深厚软土区；群桩基础；堆载；承载力；固结万方数据西南交通大学硕士研究生学位论文第1II页AbstractWiththesustainabledevelopmentofrailway，highwayconstructionscaleinourcountryandtotalmileageofrailway，roadBridgesisgrowing，butduetothelimitationo

2、fvariousfactorssuchasconstructionconditionsandenvironment，naturalfillingsoilandtheconstructionofthediscardfillinglargeaccumulationaroundthebridgepilefoundationoftenappear．Therearetwoaspectsoftheresultsinfillingpileloadmainly．Ontheonehand，bridgepilefoundationledtobendingdeformation，w

3、hichwascausedbyhorizontaldisplacementofpiletosoil，resultingintheupperstructuredeviationthatCan’tevennormallywork；ontheotherhand，thePilemakesthefurtherconsolidationofsoilandcausesthesoilandpilebodyrelativedisplacementSOthatproducelargernegativefrictionresistance，andthusthebearingcapa

4、cityofpilefoundationandproduceunevensettlement．Asyoucarlsee，theadverseimpactoftheeffectonbridgepilefoundation，pileloadbearingcapacityanddeformationposeaseriousthreatonrailwaytransportationandpeople’Slifeandpropertysafety．Sotheexistingbridgepilegroupfoundationundertheinfluenceofpilel

5、oadbearingcharacteristicsanddeformationlaw，evaluatewhetheritisnecessarytomeettherequirementsofthedesignbearingcapacityanddeformation．Thesummarybasedontheanalysisoftheimpactinrecentyearsathomeandabroad，isdeducedbytheelastictheoryunderdifferentpileloadlevel，pileloaddistancetheoretical

6、calculationformulaofbearingcapacityofpilefoundation；Corresponding、析ththetheoreticalcalculation，theestablishmentofthree—dimensionalfiniteelementmodel，itisconcludedthatthesinglepileandthepilegroupwithheaploadlevelandthedistancechangeofpilefoundationbearingcapacityanddeformationlawofde

7、velopment；Onthisbasis，theanalysisofthepilefoundationofpileandsoilinthethreedimensionalfiniteelementconsolidation．forpilefoundationsettlementandinternalforcealong谢也thetimedevelopmentregularity，andcomparesthem嘶ththefieldmeasureddataanalysistoprovethevalidityoftheanalysis．themainresear

8、chresultsofthepaper