桩-桶基础抗拔承载力试验分析

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1、ABSTRACTAlongwithexploitationofresourceofocean，oceanengineeringbecomemoreandgraduallyintothedeepoceanfromtheoffshore．Well-known．oceanenvironmentiscomplex，therearemanyfactorstoaffectthestructure．Sooceanengineeringneedfoundationswithmorehighlycapability．Thep

2、ile—bucketfoundationisanewmulti-foundationwithhighlyverticalbearingcapacityofpileandhorizontalbearingcapacityofbucketfoundation．Becausethisfoundationisprovidedwithadvantageofbothpileandbucketfoundation，ithasagoodperformance．Itcanbeusetoport。oceanoilplatroo

3、f，breedaquaticsindeepoceanandSOon．Itbeworthtoengineedngresearch．Pile-bucketfoundationcharacteristicisthecapacityofbearingpressureloading。uplift—loadingandhorizontalloading．ThispaperisonlytoresearchandanalyzetheupliftmodeltestandtheresultofsimulationwithPDF

4、2D．Firstly，aseriesofmodeltest，includingwholemodel，halfmodelandspecialdevjce，aredesignedtoresearchupliftcharacteristicofpile-bucketfoundation．Thewholemodelisusedtoanalyzetherelationbetweenuplift—loadingandup—displacement，toobserveruptureonthesurfaceofsoil．H

5、alfmodelismainlyusedtoobserveruptureintheinterior．Secondly，accordingtotheresultofwholemodeltestwithuplift—load，wecangettheruptureofsurfaceincludingtwocirclewithonecenterthatisthepileaxesandradioactivecracks．thispaperanaIysestherelationbetweenuplift—loadand

6、up。displacement．Theuplift—loadingandup—displacementcuryeistypical．Ithasalinearsegment，atransitionsegmentandaprecipitatesegment．Baseontherelationwithoutdimension，somepile—bucketfoundationup-displacementcontrolcalculatingmodelsaredesigned．IIIThirdly，byuseofh

7、alfmodeltest，wecangetthefailuremodeintheinterior．Consideredwithcircleruptureonthesurface，wecanconcludethatthefailuresurfaceissurfaceofrotationoftwouDanddownconic．Thefailureofthepartnearthebottomofpileisslidingfailure．WeSketchestheruptureoffailuremodeastwou

8、panddownarcsthatsimilitudewithtest．Atheoreticalmodelisproposedtocalculatetheultimateupliftbearingcapacityinthesand．Theresultofcalculatingandthetestwerecomparedandtheerrorissmall．Fourthly，integratetheresultofw