土工基础

›› 2016, Vol. 30 ›› Issue (5): 580-583.

• 工程实录 • 上一篇    下一篇

厦门岩内隧道长期稳定性分析

吕森鹏   

  1. （厦门路桥建设集团有限公司，福建厦门 361026）
  • 收稿日期:2016-02-24 修回日期:2016-03-24 出版日期:2016-10-20 发布日期:2016-10-31
  • 作者简介:吕森鹏（1984-），男，工程师，研究方向为路桥隧道工程。 

Long-term Stability Evaluation of Yannei Tunnel in Xiamen

LV Senpeng   

  1. (Xiamen Road and Bridge Construction Group Co. Ltd., Xiamen 361026)
  • Received:2016-02-24 Revised:2016-03-24 Online:2016-10-20 Published:2016-10-31

摘要： 软岩隧道围岩蠕变特性会对隧洞的长期稳定性产生重要影响。以厦门岩内隧道为研究对象，对取自现场的全风化花岗岩进行了一系列三轴蠕变试验研究，建立了适用于该岩石的幂指数蠕变模型，通过对试验数据的分析得到了隧道围岩的蠕变参数。将全风化花岗岩蠕变模型嵌入到有限元程序中，对岩内隧道的长期稳定性进行了分析。结果表明，由于围岩的蠕变特性，隧道建成2年内围岩的变形较大，但逐渐趋于稳定。隧道运营10年后，围岩变形导致的衬砌破坏区主要集中在拱脚部位，面积较小，不会对隧道的长期稳定性产生影响。

关键词: 蠕变, 软岩, 岩内隧道, 长期稳定性

Abstract: The creep characters of the tunnel in the soft surrounding rocks will have an impact on the long term stability of the tunnels. This paper present the triaxial creep test results on the completely weathered granite samples from Xiamen Yannei Tunnel Project. The exponential creep model for the tunnel is able to be established throughout the laboratory test data. The laboratory calibrated creep model was implemented in the finite element method in order to investigate the long term stability of the tunnel. The results indicate that a large deformation at the tunnel will be occurred within two years after the tunnel construction. After ten years of operation, the deformation of the tunnel is concentrated in a small area at the lower portion of the tunnel cross section. The creep related deformation will not pose a stability concern to the tunnel.

Key words: Creep； Soft Rock； Yannei Tunnel, LongTerm Stability