Page 205 - 《水资源与水工程学报》2024年第2期
P. 205
!35 "!2 # & ' ( ) & * + , - Vol.35No.2
2024 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2024
DOI:10.11705/j.issn.1672-643X.2024.02.23
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Bearingcharacteristicsofbridgefrictionpilesunderdifferentloads
1,2
ZHAOLicai
(1.DepartmentofCivilandConstructionEngineering,TaiwanUniversityofScienceandTechnology,Taipei10607,China;
2.TheThirdEngineeringBranchCo.,Ltd.ofChinaRailway19thBureauGroupCo.,Ltd.,Shenyang110136,China)
Abstract:Itisofgreatsignificancetostudythebearingcharacteristicsofcastinplacefrictionpilescon
structedbydrillinggroutingtechniqueandthedistributionlawofthepilemechanicalpropertiesforthe
safetyandstabilityofbridgeoperation.TakingthepilefoundationofChongqingSandianInterchange
Type1Bridgeastheresearchobject,thelaboratorytestwasdesignedaccordingtothecharacteristicsof
thebridgepilefoundation,andtheperformanceofthesinglepilebearingcapacity,pileaxialforceand
sidefrictionresistancewasstudiedsuccessively.Thenthetestresultswerecomparedwiththoseofthenu
mericalsimulationandtheoreticalformula.Theresultsshowthatthelithologyofthebearinglayeraffects
thetopdisplacementofthebridgepile ,thehigherthegeotechnicalperformanceofthebearinglayer,the
smallerthedisplacementamplitudeofthepiletop.Inaddition ,thevariationrangeofthepileaxialforce
andfrictionresistanceincreasesfirstandthendecreaseswiththeincreaseofthepiletopload ,andthe
frictionresistanceisthelargestinthemiddleofthepile.Accordingtotheverificationofthetheoretical
formulaandfiniteelementanalysis ,theoveralldeviationrateofthelaboratorytestissmall,itreflects
thatthevariationlawofthepileaxialforcearewellexpressedunderthesethreecalculationmethods.The
findingscanprovideanimportanttheoreticalsupportforthepreventionandcontrolofdamagestobridges
inthelaterperiodofoperation.
Keywords:bridgepilefoundation;castinplacefrictionpile;loadbearingtest;axialforce;frictional
resistance
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