Study of influence of formation conditions on construction process rules of ultralarge section and weak broken wall rock tunnel by numerical simulation

ZHOU Yi; LI Shu-cai; LI Li-ping; ZHAO Yan; LIU Qin; YUAN Xiao-shuai

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Study of influence of formation conditions on construction process rules of ultralarge section and weak broken wall rock tunnel by numerical simulation

更新时间：2026-06-25

- Study of influence of formation conditions on construction process rules of ultralarge section and weak broken wall rock tunnel by numerical simulation
- Vol. 32, Issue S2, (2011)
- 作者机构：
  
  山东大学岩土与结构工程研究中心,济南,250061
- 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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ZHOU Yi, LI Shu-cai, LI Li-ping, et al. Study of influence of formation conditions on construction process rules of ultralarge section and weak broken wall rock tunnel by numerical simulation[J]. 2011, 32(S2).
DOI：

ZHOU Yi, LI Shu-cai, LI Li-ping, et al. Study of influence of formation conditions on construction process rules of ultralarge section and weak broken wall rock tunnel by numerical simulation[J]. 2011, 32(S2). DOI：

摘要

兰渝铁路两水隧道地质条件复杂，围岩软弱破碎，沿线地形起伏，隧道埋深变化大。根据埋深等地层条件的变化，在不同的区段选择合适的施工方案，控制隧道围岩变形是隧道安全控制的关键所在。结合该工程的勘察和设计资料，采用大型有限差分软件FLAC3D建立三维数值模型，系统地研究不同埋深条件下开挖进尺对隧道变形的影响。从变形角度揭示了埋深对开挖进尺的影响规律，确定了不同埋深条件下最利于变形控制的循环进尺，为工程的施工决策提供技术指导和理论支持。

Abstract

The Liangshui tunnel of Lan-Yu Railway is constructed with the complex geological condition of weak broken wall rock; and the tunnel depth changes greatly because of terrain fluctuation. Formulating appropriate construction scheme according to the special formation conditions in relevant sections is key issue for the safety control of the tunnel. Based on the investigation data

numerical simulations are conducted using the fast Lagrangian analysis of continua in 3 dimensions(FLAC3D) to research the influence of excavation length on surrounding rock deformation in different buried depth cases. Rules of the effect of buried depth on excavation circulation length are studied from the deformation angle; and the excavation circulation lengths most favorable to deformation control in different buried depth cases are analyzed; the results offer technical guidance and theoretical support for construction decision.

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