增补管桩加固的既有桩基抗震韧性提升机理研究

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【中图分类号】：U445.72 【文献标志码】：A 【文章编号】：1008-3197（2025）05-24-06

【DOI编码】：10.3969/j.issn.1008-3197.2025.05.006

Research on theMechanism of Improvement of Seismic Resilience of Pile Foundations Based on Supplementary Pipe Pile Reinforcement

SHIHaiyang，WANG Fuyou，ZHANG Yimin （Tianjin Transportation Research Institute，Tianjin 3Oo30o，China）

【Abstract】：Inorder to improve theseismicresilienceof existing bridge pile foundations，this paper proposesareinforcement scheme based on supplementary pipe piles，the mechanism and influencing factors of the improvement of seismic resilience of existing pile foundations is studied by finite element numerical methods.The follwing conclusions were drawn by conducting sensitivity analysis on parameters such as pile length，pile diameter， and pile spacing.Adopting additional seismic reinforcement measures for pile foundations，the horizontal resistanceof thereinforcedpilecanbesignificantlyimproved，andtheinternalforceresponseofthepilefoundationunder dynamic loads can be reduced.However，the reinforcement effect gradually weakens as the reinforcement strength increases.The effct of reducing the deformation and internal force response of the existing pile foundation is more significant by increasing the diameter specifications and spacing of the pipe piles.

【Key words】：bridge fundation；supplement pipe piles；pile foundation reinforcement；seismic performance；resilience enhancement

随着经济发展，交通量增加，桥梁原有通行能力无法满足社会需求，改扩建项目逐渐增多。（剩余5662字）