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首页> 外文期刊>International journal of geomechanics >Performance Evaluation of Long Pipe Roof for Tunneling below Existing Highway Based on Field Tests and Numerical Analysis: Case Study
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Performance Evaluation of Long Pipe Roof for Tunneling below Existing Highway Based on Field Tests and Numerical Analysis: Case Study

机译：基于现场试验和数值分析的公路隧道长管屋盖性能评估：案例研究

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摘要

Pipe roof is a commonly used prereinforcing measure for stabilizing tunnel arches during tunneling in portal sections or passing beneath important facilities. This paper presents an investigation on the mechanical performance of a large-scale pipe roof (the pipes are 85 m long and 159 mm in diameter) that was used to prereinforce the surrounding ground and improve the stability of the Shitougang Railway Tunnel, which passes beneath the Hengyang-Kunming Highway in China. Three-dimensional numerical analysis was performed to investigate the mechanical performance of the pipe roof, and the stresses of the pipes were measured in the field using a series of strain gauges. Reasonable agreement was found between the observed field measurements and the numerical results. Such results indicate that the stress distribution of the pipe roof can be divided into three sections: a tension section right near the entrance casing arch, a compressive section behind the tunnel face, and a tension section ahead of the tunnel face. The peak stress values take place approximately at the middle of each section, which varies with the advancement of the tunnel face. This analysis provides a reference for evaluating the mechanical response of the long and large pipe roof in reinforcing shallow tunnel passing below highways. (C) 2017 American Society of Civil Engineers.
机译：管顶是一种常用的预加固措施，用于在入口部分进行隧道施工或在重要设施下面通过时稳定隧道拱。本文对大型管棚（管长85 m，直径159 mm）的机械性能进行了研究，该管棚用于预加固周围的地面并改善石通港铁路隧道的稳定性，该隧道从下方穿过中国的衡阳至昆明公路。进行了三维数值分析，以研究管顶的机械性能，并使用一系列应变仪在现场测量了管的应力。在观察到的现场测量结果和数值结果之间找到了合理的一致性。这些结果表明，管顶的应力分布可分为三个部分：入口套管拱附近的受力部分，隧道面后面的压缩部分和隧道面前面的张力部分。峰值应力值大约发生在每个断面的中间，并随隧道面的前进而变化。该分析为评估长大管棚在高速公路下方通过的浅埋隧道的力学响应提供了参考。 （C）2017年美国土木工程师学会。

著录项

  • 来源
    《International journal of geomechanics》 |2017年第9期|04017054.1-04017054.12|共12页
  • 作者

    Shi Yufeng; Fu Jinyang; Yang Junsheng; Xu Changjie; Geng Daxin;

  • 作者单位

    East China Jiaotong Univ, Sch Civil Engn & Architecture, Nanchang 330029, Jiangxi, Peoples R China|Jiangxi Prov Inst Water Sci, Nanchang 330029, Jiangxi, Peoples R China;

    Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China;

    Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China;

    Zhejiang Univ, Res Ctr Coastal & Urban Geotech Engn, Hangzhou 310058, Zhejiang, Peoples R China;

    East China Jiaotong Univ, Sch Civil Engn & Architecture, Nanchang 330013, Jiangxi, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Tunneling; Pipe roof; Mechanical performance; Field test; Numerical analysis;

    机译：隧道;管道顶板;力学性能;现场试验;数值分析;

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