土工基础

›› 2017, Vol. 31 ›› Issue (2): 214-216.

• 工程实录 • 上一篇    下一篇

深埋软岩隧道管片综合受力分析

孙 峰 1，2   

  1. （1.中铁第四勘察设计院集团有限公司，武汉 430063；2.水下隧道技术湖北省工程实验室，武汉 430063）
  • 收稿日期:2017-02-27 修回日期:2017-03-01 出版日期:2017-04-20 发布日期:2017-05-04
  • 作者简介:孙 峰（1985-），男，工程师，研究方向为隧道工程设计。

Analysis of Tunnel Shielding Segments in Deeply Buried Soft Rock

SUN Feng   

  1. (China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063)
  • Received:2017-02-27 Revised:2017-03-01 Online:2017-04-20 Published:2017-05-04

摘要： 由于管片刚度较大，高应力软岩隧道采用TBM法施工时，其管片结构往往处于受力过大状态，进而影响隧道的安全。鉴于此，以新街台格庙TBM试验斜井为依托，通过分析高应力软岩隧道变形机理，并对比目前设计中常见计算方法，提出基于特征曲线+荷载结构法的综合计算法，该方法可全面考虑软弱围岩对管片作用，对管片受力状态分析更为符合实际情况，且计算结果偏于安全。

关键词: 盾构隧道, 高应力, 软岩, 特征曲线法, 荷载结构法

Abstract: Due to its large rigidity of the tunnel shielding segment using the Tunnel Boring Machine (TBM) excavation construction, the segment structure might experience an excessive stress concentration in the highly stressed zone of deeply buried soft rock mass. In the TBM excavation of the Taigemiao Inclined Shaft of Shehua Xinjie project, the deformation characteristics of the shielding segment in the highly stressed zone of soft rock mass is evaluated. A new evaluation method which is the combination of characteristic curve method and load structure method is proposed for the conservative and more realistic analysis.

Key words: Shielded Tunnel, Highly Stressed Zone, Soft Rock, Characteristic Curve Method, LoadStructure Method