土工基础

›› 2018, Vol. 32 ›› Issue (2): 146-150.

• 工程实录 • 上一篇    下一篇

安家庄隧道施工对相邻已营运隧道安全性的评估

周杰1，罗军镪1，杨凡杰2，张王杰2，李攀2，金韵哲2   

  1. （1.中交隧道工程局有限公司，北京 100000；2.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，武汉 430071）
  • 收稿日期:2018-01-04 修回日期:2018-01-16 出版日期:2018-04-30 发布日期:2018-05-09
  • 作者简介:周杰（1983-），男，工程师，研究方向为工程建设项目管理与运营。
  • 基金资助:

    国家自然科学基金（51404240）

Assessment of Anjiazhuang Tunnel Construction on theAdjacent Operational Tunnels

ZHOU Jie1, Luo Junqiang1, YANG Fanjie2, ZHANG Wangjie2, LI Pan2, JIN Yunzhe2   

  1. (1.CCCC Tunnel Engineering Co., Ltd., Beijing 100000;
    2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2018-01-04 Revised:2018-01-16 Online:2018-04-30 Published:2018-05-09

摘要： 新建隧道的开挖会导致临线既有隧道中围岩应力的重分布，对既有隧道衬砌产生不利影响。山西通昌能源有限公司兴县铁路安家庄隧道紧邻瓦日铁路和肖家洼铁路，距肖家洼铁路隧道最近仅1.1 m，距瓦日铁路隧道最近为19.7 m。安家庄隧道的开挖对两侧既有隧道的安全性构成了严重威胁。针对该问题，首先详细介绍了隧道线路布置、工程地质条件及隧道结构形式等工程条件；然后，采用数值方法，计算了安家庄隧道开挖后两侧既有隧道衬砌的受力情况；并在此基础上，选取两侧既有隧道衬砌的最不利受力位置，依据铁路规范对安家庄隧道开挖后临线既有隧道衬砌的安全性进行了定量评估。研究成果为安家庄隧道的设计和施工提供了重要指导。

关键词: 隧道施工, 既有隧道, 数值计算, 安全性评估

Abstract: The tunnel excavation will result in the stress redistribution in the surrounding rock mass and therefore induce an adverse effect on the lining of the existing adjacent tunnels. The proposed Anjiazhuang Tunnel, which is funded by Shaanxi Tongchang Energy Co., is adjacent to the rail lines of Wari and Xiaojiawa. Since the edge of the proposed tunnel is only 1.1 meters to the tunnel of Xiaojiawa line and 19.7 meters to the tunnel of Wari line, the tunnel excavation might post a serious safety hazard to the operational adjacent tunnels. This paper presents the numerical evaluation results of the stress redistribution in lining of the adjacent tunnels during the new tunnels excavation based on the actual rail tunnel locations, geological conditions and tunnel structural and geometries. A quantitative safety evaluation was performed at the most unfavorable locations at both sides of the tunnel linings in accordance with the current railway safety codes. 

Key words: Tunnel Excavations, Existing Adjacent Tunnels, Numerical Simulations, Safety Assessment