大口径管廊顶管侧穿施工对既有桥梁桩基影响研究

王志荣; 周文欢; 谷音; 王聪

doi:10.3724/j.gyjzG25010803

大口径管廊顶管侧穿施工对既有桥梁桩基影响研究

doi: 10.3724/j.gyjzG25010803

1. 厦门路桥百城建设投资有限公司, 福建厦门 361001;
2. 福州大学土木工程学院, 福州 350108

基金项目:

国家自然科学基金项目（52278159）。

详细信息

作者简介:
王志荣，高级工程师，主要从事基础设施建设研究工作。电子信箱：361396727@qq.com

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出版历程
- 收稿日期: 2025-01-08
- 网络出版日期: 2026-11-07

Research on the Impact of Large-Diameter Pipe Jacking Side-Passing Construction on Existing Bridge Pile Foundations

1. Xiamen R&B BAICHENG Co., Ltd., Xiamen 361001, China;
2. Colloge of Civil Engineering, Fuzhou University, Fuzhou 350108, China

摘要

摘要: 为探索大口径管廊顶管近距侧穿对既有桩基的扰动影响规律，分析不同施工参数下桩基的变形与内力响应，采用三维非线性有限元方法建立了曲线顶管隧道近距侧穿既有桩基数值模型，并结合理论分析与现场监测验证模型的可靠性，总结了既有桩基在顶管施工不同阶段时的内力、变形的变化规律；在此基础上，分析不同间距、开挖面支护力、管-土摩擦力、注浆压力对侧穿既有桥梁的扰动影响。结果表明：间距的减小显著增强了顶管施工对桩基的扰动影响；开挖面支护力对桩基顺桥向变形的影响尤为显著，并且支护力升高会增强桩基对其他扰动因素的敏感性；触变泥浆的减阻作用对保证结构安全具有重要作用，在保证触变泥浆的减阻效率并将注浆压力位置在静止土压力±50 kPa范围内时，可有效减小桩基受扰动影响。
- 大口径顶管 /
- 顶管侧穿 /
- 既有桩基 /
- 有限元分析
Abstract: In order to explore the disturbance effects of near side-passing of large-diameter pipe jacking on existing pile foundations， the deformation and internal force responses of pile foundations under different construction parameters were analyzed. A numerical model of a curved jacking tunnel crossing the existing pile foundation at a close range was established based by employing a three-dimensional nonlinear finite element method. The reliability of the model was verified through theoretical analysis and field monitoring. The variations in internal forces and deformations of the pile foundation during different stages of the pipe jacking construction were summarized. On this basis， the disturbance effects on the existing bridge piles caused by different parameters， such as clearance， excavation face supporting force， pipe-soil friction. and grouting pressure， were analyzed. The results show that a reduction in clearance significantly enhances the disturbance effects of pipe jacking construction on the pile foundation. The excavation face supporting force has a particularly significant impact on the longitudinal deformation of the pile foundation， and an increase in supporting force amplifies the sensitivity of the pile foundation to other disturbance factors. The anti-resistance effect of thixotropic grout plays an important role in ensuring structural safety. When the anti-drag efficiency of thixotropic grout is maintained and the grouting pressure is within the range of static soil pressure ±50 kPa， the disturbance effect on the pile foundation can be effectively reduced.
- large-diameter pipe jacking /
- pipe jacking side-passing /
- existing pile foundation /
- finite element analysis

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参考文献(16)

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