土工基础

›› 2015, Vol. 29 ›› Issue (6): 16-19.

• 工程实录 • 上一篇    下一篇

某运营山区偏压隧道病害分析与控制研究

刘远程   

  1. （桂林理工大学广西岩土力学与工程重点实验室,土木与建筑工程学院,广西桂林 541004）
  • 收稿日期:2014-12-15 出版日期:2015-12-22 发布日期:2015-12-30
  • 作者简介:刘远程（1988-），男，硕士研究生，主要研究方向为岩土工程、地下工程及隧道工程。

Analysis and Mitigation of the Hazards of an Operational Mountain Tunnel Induced by the Deviator Stress

LIU Yuancheng   

  1. （College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004）
  • Received:2014-12-15 Online:2015-12-22 Published:2015-12-30

摘要： 偏压隧道病害的发展，与水文地质、设计、施工等条件关系密切，但最主要影响因素是山体长期承受偏压应力作用。偏压应力的持续性作用会导致围岩的渐进性破坏，进而诱发各种隧道病害。因此，确定偏压作用对隧道病害作用机理尤为重要。基于偏压隧道数值模拟计算，结合工程实例，研究隧道开挖前、后围岩偏压应力的重分布作用，并结合工程实测病害统计数据进行分析。结果表明，偏压作用的隧道会引发围岩衬砌的应力集中部位的渐进性蠕变，进而产生裂缝，诱发渗漏水等隧道病害，并随着应力的集中呈现差异性病害的分布规律。

关键词: 偏压隧道, 病害, 渐进性, 裂缝, 渗漏水

Abstract: The development of the deviator stress induced tunnel hazards could be closely related to the hydrological conditions, design parameters and construction techniques. However, the most important factor that contributing to the tunnel hazards is the magnitude of the deviator stress. Under the sustained high magnitude of the deviator stress, the confining rock mass might develop a progressive failure mode and then induce various related hazards. Therefore, the mechanism of the deviator stress induced tunnel hazards have a special importance. In this paper, in addition to the numerical analysis results, the statistical analysis of the observed tunnel hazard data before and after the tunnel excavation are also conducted. The results indicate that, a tunnel under the high magnitude of deviator stresses might result in creep failure at the stress concentrated area in the lining system. As a result, cracks might be developed in the lining system and the seepage hazards might be induced.

Key words: Tunnel under Deviator Stresses, Hazards, Progressive Failures, Cracks, Water Seepage