›› 2017, Vol. 38 ›› Issue (11): 3278-3286.doi: 10.16285/j.rsm.2017.11.025

• 岩土工程研究 • 上一篇    下一篇

隧道正交穿越滑坡体的安全距离及稳定性分析

张治国1, 2, 3，徐晓洋1，姜蕴娟1，赵其华3   

  1. 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
  • 收稿日期:2015-11-06 出版日期:2017-11-10 发布日期:2018-06-05
  • 作者简介:张治国，男，1978年生，博士、博士后、副教授、硕士生导师，主要从事地下工程施工对周边环境影响控制方面的研究工作。
  • 基金资助:

    国家自然科学基金项目（No. 41772331）；上海自然科学基金项目（No. 15ZR1429400）；国土资源部丘陵山地地质灾害防治重点实验室课题（No. 2015k005）；地质灾害防治与地质环境保护国家重点实验室基金（No. SKLGP2015K015）

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

ZHANG Zhi-guo1, 2, 3, XU Xiao-yang1, JIANG Yun-juan1, ZHAO Qi-hua3   

  1. 1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. Key Laboratory of Geohazard Prevention of Hilly Mountains, Ministry of Land and Resources, Fuzhou, Fujian 350002; 3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2015-11-06 Online:2017-11-10 Published:2018-06-05
  • Supported by:

    This work was supported by Natural Science Foundation of China (41772331), Shanghai Natural Science Foundation (15ZR1429400), the Open Project Program of Key Laboratory of Geohazard Prevention of Hilly Mountains, Ministry of Land and Resources (2015k005), and the Open Project Program of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (SKLGP2015K015).

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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。

关键词: 隧道, 滑坡, 正交穿越, 安全距离, 稳定性, 理论解析, 数值模拟

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.

Key words: tunnel, landslide, orthogonally crossing, safety distance, stability, theoretical analysis, numerical simulation

中图分类号: 

  • TU 45

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