西藏米拉山隧道围岩大变形成因分析

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摘要隧道围岩大变形是隧道施工中的一个极其复杂难题。文章以西藏米拉山隧道围岩大变形为研究对象，通过现场调查与试验分析对大变形成因进行了研究，结果表明：米拉山隧道凝灰岩抗风化能力差和遇水易软化是围岩大变形的根本原因，而施工工艺不当是围岩大变形的重要诱因。基于米拉山隧道大变形成因分析，文章提出了米拉山隧道大变形处治方案和控制措施。

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	吴树元 1 程勇 1 谢全敏 2 刘继国 1 陈必光 1

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Abstract： Large deformation of tunnel surrounding rocks is a sophisticated problem during tunnel construction. Taking the large deformation of surrounding rocks of Milashan tunnel in Tibet for example, the causes of large deformation were studied by site investigation and experimental analysis. The results show that properties of tuff such as poor weather resistance and softening upon meeting water are the two radical reasons of large deformation, and improper construction technology is a main inducement. A treatment scheme and control measures were proposed based on an analysis of causes of large deformation of Milashan tunnel

Keywords： Milashan tunnel；Tuff, Large deformation of surrounding rock；Formation mechanism；Disaster control

基金资助:基金项目：西藏自治区重点科研项目（2016XZ01G31）；国家自然科学基金项目（50874085）.

作者简介: 作者简介：吴树元（1979-），男，高级工程师，主要从事道路与隧道工程设计方面的研究工作，E-mail：117232535@qq.com. 通讯作者：谢全敏（1968-），男，教授，博士，主要从事岩土与地下工程方面的研究工作，E-mail：xiequanmin@126.com

引用本文:

吴树元 1 程勇 1 谢全敏 2 刘继国 1 陈必光 1 .西藏米拉山隧道围岩大变形成因分析[J] 现代隧道技术, 2019,V56(4): 69-73

WU Shuyuan1 CHENG Yong1 XIE Quanmin2 LIU Jiguo1 CHEN Biguang1 .Analysis on the Causes of the Large Deformation of Surrounding Rocks of Milashan Tunnel in Tibet[J] MODERN TUNNELLING TECHNOLOGY, 2019,V56(4): 69-73

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