鄰近堆載作用下橋梁樁基內(nèi)力與變形數(shù)值分析

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MA Di

（State Owned Assets Management Department， Shaanxi Normal University，Xi'an 71O119，China） Abstract：Inthispaper，theinfluenceofpileloadontheinternalforceanddeformationofadjacent bridgepilefoundationis studied by numericalanalysis.TheCELmethodwasusedtoestablishathree-dimensionalfiniteelement modelof the pile foundationofabridge.Thevalidityofthemodelisverifiedbycomparing the measuredandcalculatedtransversedisplacementof thetracktopsurface.Basedonthecalculationresultsof themodel，theinternal forceanddeformationcharacteristicsof pile foundation near a large number of piles are analyzed：Each pile's maximum horizontal displacement appears at 1/2L of the pile body.In the range of 1/6L～2/3L of each pile，a large additional bending moment was generated. The upper part of the pile closer tothesurchargehasanegativefrictionalforce，which in turnproducesanadditionalaxial forceof581＼～1368kN.Itis obvious that thesurcharging loadseriouslydeteriorates thepilefoundation.Itcanprovideafeasible methodforactive prevention and control of pier deflections caused by surcharge load.

Keywords：surcharge loading；bridge pile foundation；CEL；numerical analysis； internal force；deformation

0 引言

實際工程中的橋梁樁基，不僅承受上部結構傳來的主動荷載，還承受其他原因?qū)е碌谋粍雍奢d。（剩余7220字）