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隧道建设(中英文) ›› 2007, Vol. 27 ›› Issue (增刊): 60-63.DOI: A

• 研究与探索 • 上一篇    下一篇

局部破碎带下海底岩体隧道稳定性分析

王在泉,  王建新,  郑颖人,  张黎明   

  1. 1. 青岛理工大学, 青岛266033|2. 清华大学, 北京100084|3. 后勤工程学院| 重庆400041
  • 收稿日期:2007-04-16 出版日期:2007-08-10 发布日期:2010-04-20
  • 作者简介:王在泉|男|教授|博士|主要从事岩土工程稳定性研究。

Analysis on Stability of Subsea Tunnel in Faultrupture Zone

WANG Zai-Quan,  Wang-Jian-Xin,  Zheng-Ying-Ren,  Zhang-Li-Meng   

  1. 1. Qingdao Technological University, Qingdao 266033|2. Tsinghua University, Beijing 100084|
    3. Logistical Engineering University, Chongqing 400041)
  • Received:2007-04-16 Online:2007-08-10 Published:2010-04-20

摘要:

以局部破碎带的某海底岩体隧道为例,采用有限元极限分析法分析了海底隧道岩体注浆加固前后的稳定性。计算表明,对于整体较为安全的隧道,当存在局部破碎带时,安全度降低,破碎带越宽,注浆堵水圈厚度越小,安全系数越小。与完整围岩破裂面位于两侧相比,含倾角45°破碎带围岩的堵水部分最先失稳。因此,必须做好破碎带的超前注浆堵水,以减少其渗水量,并对破碎带进行局部加固,此种情况下,隧道衬砌原则上可按无水压设计,衬砌厚度与采用全水头设计相比可以大大降低。

Abstract:

Considering the sea water seepage, limit analysis by finite element method is used in a subsea tunnel to analyze the stability before and after grouting reinforcement. Results show that the faultrupture zone decreases the stability of tunnel. The wider the faultrupture zone is, the more unsafe the tunnel is. The more thickness the grouting loop is, the safer the tunnel is. And the faultrupture zone with slip surface of 45° tends to lose stability most. The width of subsea tunnel lining must increase, if the full seepage pressure is considered in the design of tunnel.

Key words:  , limit analysis by finite element method subsea tunnel stability

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