软弱夹层隧道实测支护结构受力及变形规律研究
A Study of the Law of the Support Structure in Stress and Deformation for Weak Inter Layer Tunnels
  
中文关键词:软弱夹层  大变形  变形侵限  支护结构应力
英文关键词:weak inter layer  large deformation  deformation intrusion limit  stress of the support structure
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作者单位
柴聪斌 中铁十六局集团第五工程有限公司河北唐山063000 
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中文摘要:
      软弱夹层隧道施工过程中,受岩体软硬不均和层理分布影响,使初期支护受力变形不协调分布,从而易引起支护结构破坏甚至洞室整体失稳破坏。以兰渝铁路东扎沟隧道为工程背景,分析了隧道施工变形的纵向分布规律与地质条件变化的关系,施工变形的横断面分布规律与地质条件的关系,研究了加强支护后围岩压力、初期支护结构应力的横断面分布和变化规律,得出一些有益的结论,为类似工程提供借鉴。
英文摘要:
      When a tunnel is built in a weak inter layer, the uneven distribution of soft and hard rock and bedding distribution often results in the inharmonious stress and deformation of the initial support, which may lead to damage to the support structure or even the complete instability of the cavity. With the Dongzagou Tunnel of the Lanzhou Chongqing Railway as the engineering background, analyzed and studied in the present paper are the relationship between the longitudinal distribution of the tunnel deformation and the change of geological conditions, and the relationship between the distribution law of the cross section of the construction deformation and the geological conditions, and also explored are the distribution and change laws of the cross section of the the post-support pressure of the surrounding rock and the stress of the construction caused deformation of the initial support, with some useful conclusions obtained. The paper may serve as a useful reference for other similar projects.
柴聪斌.软弱夹层隧道实测支护结构受力及变形规律研究[J].国防交通工程与技术,2019,17(6):36~40
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