Analysis of the safety distance and the stability of the tunnel orthogonally crossing the landslide

ZHANG Zhi-guo; XU Xiao-yang; JIANG Yun-juan; ZHAO Qi-hua

doi:10.16285/j.rsm.2017.11.025

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Analysis of the safety distance and the stability of the tunnel orthogonally crossing the landslide

更新时间：2026-06-25

- Analysis of the safety distance and the stability of the tunnel orthogonally crossing the landslide
- Vol. 38, Issue 11, Pages: 3278-3286(2017)
- 作者机构：
  
  1. 上海理工大学环境建筑学院,上海,200093
  2. 国土资源部丘陵山地地质灾害防治重点实验室,福建,福州,350002
  3. 成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川,成都,610059
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.11.025
  CLC： TU45
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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ZHANG Zhi-guo, XU Xiao-yang, JIANG Yun-juan, et al. Analysis of the safety distance and the stability of the tunnel orthogonally crossing the landslide[J]. 2017, 38(11): 3278-3286.
DOI：

ZHANG Zhi-guo, XU Xiao-yang, JIANG Yun-juan, et al. Analysis of the safety distance and the stability of the tunnel orthogonally crossing the landslide[J]. 2017, 38(11): 3278-3286. DOI： 10.16285/j.rsm.2017.11.025.

摘要

在滑坡地段修建隧道时，隧道穿越位置对滑坡体稳定性有着重要影响。目前，研究者较多针对隧道开挖问题或者滑坡稳定性问题进行了单独研究，而将两类工程问题联合起来进行理论研究还不多见。基于滑移线理论推导的隧道开挖对围岩扰动范围公式，结合隧道上部松动岩体的分析，得出隧道正交穿越滑坡体的最小安全下穿距离的解析表达式，并对其影响因素进行了讨论；基于Sarma法，对隧道上方滑坡体的稳定性进行了分析，得出相应的安全系数。结合数值模拟方法对隧道正交穿越滑坡的多个工况进行了实例分析，通过对隧道围岩塑性区的分析，验证了该方法的有效性。成果可为滑坡地区隧道位置的选择提供一定的理论依据。

Abstract

When constructing tunnels in landslide areas

the stability of landslide is severely affected by the crossing position of tunnel. At present

the problems of tunnel excavation and the stability of landslide were separately investigated by many researchers. However

very little attention has been made on these two kinds of engineering problems together. In this study

a formula was deduced to calculate the disturbance range of surrounding soil and rock mass induced by tunnel excavation

according to the slip line theory. Combined with the analysis of loosened rock over the tunnel opening

an analytical expression was developed for the minimum safety distance of the tunnel orthogonally crossing the landslide. Moreover

its influencing factors were discussed. Besides

the stability of landslide body above the tunnel was analyzed using Sarma method

and the corresponding safety factor was also obtained. At last

a series of numerical simulations was carried out to investigate multiple examples of tunnel orthogonally crossing landslide. The accuracy of the deduced formula was verified by the analysis of rock plastic zones. Therefore

the results can provide a theoretical basis for the accurate selection of tunnel position in the landslide area.

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Related Institution

School of Environment and Architecture, University of Shanghai for Science and Technology

Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University

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Institute of Foundation Engineering, China Academy of Building Research

School of Architecture and Environment, Sichuan University

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