土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (2): 184-188.

• 专题论述 • 上一篇    下一篇

隧道下穿高压天然气管道施工影响数值模拟分析

朱红西1，2，陈志勇1，2，柯文汇1，2，钟 宇3，易 顺4,5，黄珏皓4,5   

  1. （1.武汉市市政建设集团有限公司，武汉 430023；2.武汉市市政工程机械化施工有限公司，武汉 430023；
    3.武汉地铁集团有限公司，武汉 430070；4.中国科学院武汉岩土力学研究所,岩石力学与工程国家重点实验室,武汉 430071；5.中国科学院大学,北京 100049）
  • 收稿日期:2021-02-19 修回日期:2021-03-05 出版日期:2021-04-23 发布日期:2021-04-24
  • 通讯作者: 易 顺（1993-），男，博士研究生，研究方向为隧道等城市地下工程。
  • 作者简介:朱红西（1975-），男，高级工程师，研究方向为市政工程智能化建造。
  • 基金资助:
    武汉黄鹤英才优秀青年人才资助

Numerical Simulations of Tunnel Construction Underneath an Active High-Pressure Natural Gas Pipeline

ZHU Hongxi1,2, CHEN Zhiyong1,2, KE Wenhui1,2, ZHONG Yu3, YI Shun4,5， HUANG Juehao4,5   

  1. (1.Wuhan Municipal Construction Group Co. Ltd, Wuhan 430023；2.Wuhan Municipal Engineering Mechanization Construction Co. Ltd, Wuhan 430023；3.Wuhan Metro Group Co. Ltd, Wuhan 430070；4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071；5.University of Chinese Academy of Sciences, Beijing 100049)
  • Received:2021-02-19 Revised:2021-03-05 Online:2021-04-23 Published:2021-04-24

摘要： 为提高地区排水防涝能力，越来越多的沿江沿海城市开展地下排水通道工程的建设，然而地下通道的施工不可避免会对周围环境产生影响。依托武汉光谷一路/高新四路排水通道工程，针对暗挖隧道下穿Φ720高压天然气管道施工工况，利用有限元软件Plaxis，对双侧壁导坑隧道下穿天然气管道进行了数值模拟分析。结果表明，随着施工不断地向前推进，地表沉降槽和沉降值均越来越大，地表横向沉降槽形状基本与Peck曲线相近；施工过程中，管道最大沉降值始终位于管道中部位置；管道最大沉降值为24.76 mm，小于设定的管道沉降控制值，说明了双侧壁导坑隧道施工工艺对管道位移的影响处于安全范围内。

关键词: 双侧壁导坑隧道, 天然气管道, 沉降控制值, 数值模拟

Abstract: Large size municipal stormwater discharge sewer pipes are frequently installed in urban area of coastal cities and cities near the river. These large size sewer pipe installations will un-inevitably affect the adjacent environment. This paper presents a case history of a storm water discharge sewer pipe project at Guanggu 1st Road and Gaoxin 4th Road interchange. In this project, an underground tunneling excavation of a large diameter sewer pipe was utilized to pass underneath an active high-pressure natural gas pipeline with a diameter of 720 mm. The numerical simulation was performed on the tunnel excavation with double-side pilot tunnel method by using commercial software Plaxis. The results indicate that, the ground subsidence value and area of ground subsidence increase with the progressive of the tunneling; the settlement along the cross section of the tunneling could be predicted by the Peck curve. The location of the maximum ground settlement is above the center of the sewer pipe and the observed ground settlement value is 24.76 mm, which was less than the settlement control value setup for the project.

Key words: municipal tunnel excavation with doubleside pilot tunnel method, gas pipelines, settlement control value, numerical simulations

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