土工基础

›› 2019, Vol. 33 ›› Issue (2): 103-106.

• 工程实录 •    下一篇

三排桩隔离支护的深基坑施工对既有轨道交通的影响分析

曾诗媛   

  1. （武汉地铁运营有限公司，武汉 430030）
  • 收稿日期:2019-03-02 修回日期:2019-03-13 出版日期:2019-04-20 发布日期:2019-04-22
  • 作者简介:曾诗媛（1990-），女，硕士，助理工程师，研究方向为轨道交通技术和管理。

Analysis of Influence of Deep Foundation Pit Construction with Three-row -Pile Isolation Support on Existing Rail Transit

ZENG Shiyuan   

  1. （Wuhan Metro Group Co., Ltd., Wuhan 430030）
  • Received:2019-03-02 Revised:2019-03-13 Online:2019-04-20 Published:2019-04-22

摘要： 随着城市地下轨道交通的快速发展，邻近既有轨道交通的基坑工程也越来越多。以武汉市临近轨道交通2号线的某地下室深基坑项目为依托，探讨了采用“三排桩+被动区留土”支护方法的深基坑开挖对紧邻的既有交通轨道结构稳定性的影响。结果表明：既有轨道交通结构在采用“三排桩+被动区留土” 支护方法的深基坑开挖的影响下产生的水平位移和竖向位移均低于控制值10 mm，结构内力最大变化量也在结构承载力允许范围内，既有轨道交通结构受力安全。

关键词: 基坑施工；&ldquo, 三排桩+被动区留土&rdquo, 支护；既有轨道交通；数值模拟

Abstract: With the rapid development of urban underground rail transit, there are more and more deep excavation projects to be constructed adjacent to the existing rail transit system. This paper presents a case history of the support design of a deep excavation near Wuhan Metro No. 2 Line. The effect of the “threerows of pile plus passive retained soil zone method on the existing live operating metro line is evaluated. The results indicated that, both the vertical and lateral deflections of the existing metro structures were less than 10 millimeters. The maximum stress in the metro structures were also within the allowable limits. Based on the evaluation, it is concluded that the safety of the existing metro structures could be warranted.

Key words: deep excavation construction, three-rowsofpiles plus passive retained soil zone, existing rail transit, numerical analysis