Analysis of initial support adaptability of the large-section loess tunnel

HU Shi-min; ZHANG Ding-li; LI Peng-fei; CHEN Feng-bin; ZHANG Xuan

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Analysis of initial support adaptability of the large-section loess tunnel

更新时间：2026-06-25

- Analysis of initial support adaptability of the large-section loess tunnel
- Vol. 32, Issue S2, (2011)
- 作者机构：
  
  北京交通大学隧道及地下工程实验研究中心,北京,100044
- 作者简介：
- 基金信息：
- DOI：
  CLC： U456
- Online First：26 August 2011，
  
  Published：2011
- 稿件说明：
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HU Shi-min, ZHANG Ding-li, LI Peng-fei, et al. Analysis of initial support adaptability of the large-section loess tunnel[J]. 2011, 32(S2).
DOI：

HU Shi-min, ZHANG Ding-li, LI Peng-fei, et al. Analysis of initial support adaptability of the large-section loess tunnel[J]. 2011, 32(S2). DOI：

摘要

以兰渝铁路大断面黄土隧道为工程背景，采用三维数值模拟结合现场监测实验对现有初期支护设计参数的适应性进行研究，对大断面黄土隧道初期支护的受力与变形特性进行综合分析。通过三维数值模拟得到黄土隧道开挖扰动后初期支护的受力与变形状态，将数值计算结果与现场监控量测对比获得典型断面围岩的应力和位移发展规律并对初期支护安全性进行评价；通过FLAC3D的FISH语言开发程序分析混凝土硬化特性对初期支护受力与变形的影响；现场跟踪量测与数值模拟的计算结果基本吻合，结论可为黄土地区隧道初期支护的设计和施工提供一定的借鉴和参考，积累有益的经验

Abstract

Taking the large-section loess tunnel in Lanzhou-Chongqing railway as the project background

the initial support adaptability is comprehensively researched based on in-situ monitoring and 3D numerical analysis. The mechanical and deformational properties of the initial support are comprehensively analyzed; and then the results of numerical simulation are compared with in-situ monitoring data in order to get the state of stress and displacement which brought to the optimal parameters of the initial support after excavation. The initial support safety can be evaluated; meanwhile the concrete hardening behavior influences on the stress and deformation of the initial support have been analyzed by the FISH language of the fast Lagrangian analysis of continua in 3 dimensions(FLAC3D). The conclusions provide a reference for the design and construction of the tunnel engineering in loess area; and some useful experiences have also been accumulated

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