临河深大基坑抗隆起稳定性与其对桩基影响的分析-(5430)

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1、万方数据MasterDissertationof$uzhouUniversityofScienceandTechnologyAbstractAbs仃actWiththeaccelerationofChina’Surbanizationprocess，alargenumberofundergroundstructuresarebuiltinthecoastalareas，suchasthesubway,undergroundgarage，multilayerbasementofhigh-risebuildin

2、g，undergroundshoppingmalls，undergroundhospital，undergroundcivildefencefortifications，resultinginalargenumberofdeepfoundationpitengineering．Thesepitsaregenerallylocatedinthevicinityofthebuildingorinthevicinityofthesubway．Thefoundationpitischaracterizedby”de

3、ep，large，tightandnear”．Thedesignandconstructionofthefoundationismoredifficult，andthecontrolofthesurroundingenvironmentwillbemorestringent．Inthispaper,basedonthedemonstrationprojectofthreesurfacewaterofYancheng，theprojectof”XianfengIsland”isademonstrationpr

4、oject，consideringthecomplexhydrogeologicalconditionsinKanawha，theupliftstabilityandtheanalysisofthebearingcapacityofthepileintheprocessoffoundationpitexcavation．Thestabilityanalysisoffoundationpitshowsthattherangeofthedepthofthefoundationpitislarge，andthea

5、mountofthereboundcanbeoffsetbythelaterpartofthesettlement，butitisnotconducivetothestabilityofthefoun．dationpit．Intheconstructionprocessofthefoundationpit，itshouldbeusedasmuchaspossibletouseasmallrange，multileveloffoundationpitprecipitation．Underseepagecond

6、ition,deepfoundationpitexcavationstabilizinginfluenceonbottom，mainlyafoundationpitheavebycontinuouswalltothecenterofthepitgraduallyincreasingtrend,andoutsidethefoundationpitwaterlevelistoohigh，causedbytheinsideandoutsidethefoundationpithydraulicdifferencew

7、iththeexcavationdepthincreaseswiththeincreasing，SOlevelintheprocessofexcavationpitwaterlevel，butalsothestabilityoffoundationpitproducedgreatinfluence．Inthefiniteelementsimulationofthepilegroup，theproblemofcalculatingthedifficultyinthenumericalsimulationofl

8、argescalecontactproblemisovercome．TheresearchonthefoundationpitengineeringofYancheng’SXianfengIslandshowsthatthepilefoundationcanimprovethebearingcapacityoffoundationpit，butalsocanincreasethedisplacementofthe