土工基础

›› 2015, Vol. 29 ›› Issue (3): 141-144.

• 工程实录 • 上一篇    下一篇

基坑开挖对既有地铁结构影响的数值分析

宋磊鹏   

  1. （广州地铁设计研究院有限公司，广州 510010）
  • 收稿日期:2014-12-30 出版日期:2015-06-20 发布日期:2015-06-26
  • 作者简介:宋磊鹏（1988-），男，硕士研究生，助理工程师，主要研究方向为地下结构工程。

Numerical Analysis of Effects of Deep Excavation on Existing Metro Structure

SONG Leipeng   

  1. (Guangzhou Metro Design & Research Institute, Guangzhou 510010)
  • Received:2014-12-30 Online:2015-06-20 Published:2015-06-26

摘要： 以某商业基坑为研究对象，通过MIDAS/ GTS软件建立三维有限元模型，分析了基坑开挖对既有地铁结构的影响。结果表明，地铁结构的最大水平位移和最大竖向位移都控制在规范允许的范围之内，基坑开挖对地铁结构的影响较小；同时，针对基坑开挖过程中可能存在的风险提出了相应的处理措施，对同类基坑的设计与施工有一定的指导意义。

关键词: 基坑开挖, 地铁车站, 区间隧道, 三维数值分析

Abstract:  MIDAST/GTS was used to develop a three dimensional model to study the effects of deep excavation on an existing metro structure. The results suggest that the proposed deep excavation design is capable of controlling the maximum displacements of existing metro structure in both horizontal and vertical directions within tolerable limit, i.e., the excavation has minimal impact to the metro structure. The numerical model was also used to propose the approaches to reduce the possible risks in the process of deep excavation.  

Key words: Deep Excavation；Metro Station；Tunnels, Threedimensional Numerical Analysis