Numerical analysis of upwarping deformation of existing tunnels under a new tunnel’s excavation

YU Jin; XU Qiong-he; XING Wei-wei; DING Yong; CHENG Wan-zhao

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Numerical analysis of upwarping deformation of existing tunnels under a new tunnel’s excavation

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- Numerical analysis of upwarping deformation of existing tunnels under a new tunnel’s excavation
- Vol. 28, Issue S1, (2007)
- 作者机构：
  
  1. 南京水利科学研究院岩土工程研究所,南京,210024
  2. 南京市市政设计研究院有限责任公司,南京,210008
  3. 南京地下铁道有限责任公司,南京,210008
  4. 南京理工大学土木工程系,南京,210094
- 作者简介：
- 基金信息：
- DOI：
  CLC： U459
- Online First：28 March 2014，
  
  Published：2007
- 稿件说明：
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YU Jin, XU Qiong-he, XING Wei-wei, et al. Numerical analysis of upwarping deformation of existing tunnels under a new tunnel’s excavation[J]. 2007, 28(S1).
DOI：

YU Jin, XU Qiong-he, XING Wei-wei, et al. Numerical analysis of upwarping deformation of existing tunnels under a new tunnel’s excavation[J]. 2007, 28(S1). DOI：

摘要

结合南京龙蟠路隧道（南侧）西段上跨既建成的地铁1号线双线盾构隧道的基坑工程，针对未经加固以及运用高压旋喷法加固基坑坑内地基两种工况，采用ANSYS对已建地铁盾构隧道隆起位移进行三维弹塑性有限元数值模拟。模拟计算结果表明，坑内未经加固基坑开挖后下部隧道隆起位移过大；坑内加固后基坑开挖不会造成下部隧道过大的隆起位移是安全可行的，该结论与工程实际监测结果相符。

Abstract

The protection of the Longpan Tunnel’s excavation which are right beyond two existing shield tunnels of Nanjing No.1 subway is presented. Corresponding to unstabilizing condition and stabilizing condition with high-pressure chemical churning piles

the existing shield tunnel’s upwarping deformation during the excavation is analyzed with ANSYS software of 3-D elasto-plastic finite element method. It is observed that the tunnel’s upwarping deformations were too great without stabilizing and are safet with stabilizing. The calculated results are compared with the in-situ observation data.

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Related Institution

Department of Geotecnical Engineering, Tongji University

南京市市政设计研究院有限责任公司上海200092南京市市政设计研究院有限责任公司

Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University

Department of Geotechnical Engineering, Tongji University

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