市政技术2025，Vol.43Issue(6)：114-122,9.DOI:10.19922/j.1009-7767.2025.06.114
基于桩周土体注浆加固的既有桥梁桩基抗震韧性提升性能研究
Research on the Enhancement Performance of Seismic Resiience of the Existing Bridge Pile Foundations Based on Grouting Reinforcement of Surrounding Soil
摘要
Abstract
In order to improve the seismic resilience of existing bridge pile foundations,a reinforcement technique based on grouting of the soil around the piles was proposed in this paper.The mechanism of enhancing the seismic resilience of existing pile foundations through soil reinforcement and effect characteristics were studied by finite ele-ment numerical simulation method.Sensitivity analysis was conducted on existing bridge pile foundations under dif-ferent reinforcement depths,cement content and reinforcement ranges.The following conclusion was obtained that the displacement response of the pile foundation under dynamic load was reduced by 60％after adopting grouting reinforcement measures around the pile,and the extreme value of the bending moment internal force response was reduced by 30％,which significantly improving the horizontal resistance of the existing pile foundation and reducing the deformation and internal force response;The dynamic response of pile foundation is not sensitive to the depth of cement soil reinforcement and cement dosage.But appropriately increasing the horizontal reinforcement range can obviously improve the seismic effect and reduce the dynamic response.The research results provide reference for fu-ture seismic reinforcement and toughness improvement design of similar pile foundations.关键词
基础工程/桩基加固/抗震性能/土体注浆/韧性提升Key words
foundation engineering/pile foundation reinforcement/seismic performance/soil grouting/resilience enhancement分类
交通工程引用本文复制引用
石海洋,王甫友,张一民..基于桩周土体注浆加固的既有桥梁桩基抗震韧性提升性能研究[J].市政技术,2025,43(6):114-122,9.基金项目
天津市交通运输科技重点研发项目(2024-A16) （2024-A16）
