土工基础

›› 2015, Vol. 29 ›› Issue (3): 1-05.

• 工程实录 •    下一篇

盾构隧道近接施工对桥桩影响及保护措施

陈辉   

  1. (中铁第四勘察设计院集团有限公司 城地院结构所，武汉 430063)
  • 收稿日期:2015-01-21 出版日期:2015-06-20 发布日期:2015-06-26
  • 作者简介:陈 辉（1982-），男，工程师，研究方向为地下工程设计。

Protection Measures and Study on the Effect of Tunnel Boring Adjacent to Bridge Pile Foundation

CHEN Hui   

  1. (Institute of Structure Engineering, China Railway SiYuan Survey and Design Group Co. Ltd., Wuhan 430063)
  • Received:2015-01-21 Online:2015-06-20 Published:2015-06-26

摘要： 以郑州地铁3号线盾构隧道近距离侧穿高铁高架桥桩为例，利用有限差分软件，分析了盾构施工对临近桥桩的影响，并提出设置隔离桩保护桥桩的方案。结果表明：盾构近距离侧穿桥桩时，桥桩会产生较大的竖向沉降和水平弯矩；采取设置隔离桩的措施后，对桥桩的沉降及受力有一定的改善作用，能较大限度地减少盾构施工对桥桩的影响。

关键词: 郑州地铁, 盾构侧穿, 高铁桥桩, 数值模拟, 隔离桩

Abstract: This paper presents a case study is of Zhengzhou No.3 Metro Line Tunnel Boring adjacent to the pile foundation of a highspeed railway bridge. The Fast Lagrange finite difference code was adopted to calculate the impact of tunnel boring on the pile foundation. The results suggest that: the construction will induce additional vertical deformation and horizontal bending moment. This impact can be mitigated by the construction of isolation piles.

Key words: Zhengzhou Metro, Shielded Tunneling, Bridge Pile Foundation, Numerical Simulation, Isolation Piles