中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2012, Vol. 31 ›› Issue (2): 214-217.DOI: 10.3969 /j.issn.1674-0696.2012.02.11

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扩建小净距公路隧道施工力学分析

疏义广1,蒋树屏2,雷明林1   

  1. 1. 重庆交通大学土木建筑学院,重庆400047; 2. 招商局重庆交通科研设计院有限公司,重庆400067
  • 收稿日期:2011-06-14 修回日期:2011-09-26 出版日期:2012-04-15 发布日期:2014-10-31
  • 作者简介:疏义广( 1987 - ) ,男,安徽池州人,硕士研究生,主要从事隧道力学方面的研究。E-mail: shuyiguang@126. com。

Construction Mechanical Analysis on Extension of Small Interval Tunnel

Shu Yiguang1,Jiang Shuping2,Lei Minglin1   

  1. 1. School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China; 2. China Merchants Chongqing Communication Research & Design Institute Co. ,Ltd. ,Chongqing 400067,China
  • Received:2011-06-14 Revised:2011-09-26 Online:2012-04-15 Published:2014-10-31

摘要: 利用有限元模型分析了扩建小净距隧道在不同净距下隧道围岩、中夹岩柱、锚杆及初衬的受力特征。研究结 果表明: 扩建小净距隧道围岩的屈服区主要集中在拱脚部位,拱脚部位的隧道支护结构应有所加强,当净距大于 1 /2 B 时,中夹岩柱受力状态受净距的影响很小| 隧道外侧锚杆轴力约为内侧锚杆轴力的4 ~ 5 倍。

关键词: 扩建小净距隧道, 施工力学, 有限元, 围岩应力

Abstract: A FEM model is applied to simulate the mechanical characteristics of surrounding rock,middle rock pillar,anchor and preceding lining of a neighborhood tunnel with different clear distances. The results show that: the yield district of extension small interval tunnel is mainly concentrated at arch foot| the initial supporting-lining at the arch foot should be strengthened. When the clear distance is more than 0. 5B,the mechanic state of middle rock pillar is slightly influenced by the clear distance| the bolt axial force of external tunnel is 4 - 5 times than that of the inner.

Key words: extension of small interval tunnel, construction mechanical, FEM, surrounding rock stress

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