土工基础

›› 2012, Vol. 26 ›› Issue (2): 13-15.

• 工程实录 • 上一篇    下一篇

盾构隧道近距离下穿既有隧道的数值分析

代翼飞1，孙 磊2，张 伟2   

  1. （1.中铁大桥勘测设计院集团有限公司，武汉 430050；2.中铁隧道勘测设计院有限公司，天津 300133）
  • 收稿日期:2012-02-01 出版日期:2012-04-20 发布日期:2012-04-27
  • 作者简介:代翼飞（1979-)，男，博士，中铁大桥勘测设计院集团有限公司工程师，研究方向为城市轨道交通设计。

Numerical Analysis of Existing Tunnel Under crossed  by Shield Tunnel in Short Distance

DAI Yifei1，SUN Lei2，ZHANG Wei2   

  1. （1. China Zhongtie Major Bridge Reconnaissance &.Design Institute, Co., Ltd， Wuhan Hubei  430050；2.China Railway Tunnel Survey & Design Institute, Co., Ltd， Tianjing 300133）
  • Received:2012-02-01 Online:2012-04-20 Published:2012-04-27

摘要： 通过对武汉市轨道交通3号线盾构隧道下穿2号线既有隧道工程实例的分析，结合类似地层工程经验提出了盾构隧道近距离下穿既有隧道的工程措施，并运用数值分析的方法，得到了盾构下穿过程中既有隧道的竖向位移与盾构机顶推力、土层加固、盾构机掘进位置的关系，验证了工程措施的可行性，提出了相关建议。

关键词: 盾构, 近距离下穿, 既有隧道, 数值分析

Abstract: Engineering measures for existing tunnel under crossed by shield tunnel in short distance were put forward through the analysis of project example in the Wuhan Metro line 2 under crossed by Metro line 3, combined with the engineering experience of similar geological strata. Numerical analysis methods were used to obtain the relations between the vertical displacement of existing tunnel and the jacking force of shield machine, ground strengthening and position of the shield machine. Feasibility of the engineering measures was verified and related suggestions were put forward.

Key words: Shielding,Under Crossing in Short Distance, Existing Tunnel;Numerical Analysis