Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (12): 127-131，139.

• Architecture & Civil Engineering • Previous Articles     Next Articles

Transverse-Isotropic-Elastic Homogenization Model of Pre-Support

Wang Hai-bo  Xu Ming  Song Er-xiang   

  1. Key Laboratory for Structural Engineering and Vibration of the Ministry of Education, Tsinghua University, Beijing 100054, China
  • Received:2009-01-20 Revised:2009-04-27 Online:2009-12-25 Published:2009-12-25
  • Contact: 王海波（1980-），男，博士生，主要从事地下工程数值模拟技术研究． E-mail:wang-hb04@mails．tsinghua．edu．cn
  • About author:王海波（1980-），男，博士生，主要从事地下工程数值模拟技术研究．
  • Supported by:

    国家自然科学基金资助项目（50808109）

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Abstract:

As an important means of stratum stabilization and deformation control in tunnel excavation, the pre-support, including pipe-roofing reinforcement and small pipe grouting, should be properly simulated and analyzed, and how to establish a simple and reasonable model considering the overall effect is the key issue in the numerical simulation. For this purpose, this paper presents a transverse-isotropic-elastic homogenization model of pre-support and establishes a simplified model based on the average elastic properties of pre-support, which can be used to analyze the influences of some important parameters such as pipe distance and diameter. The proposed model is then applied to the 3D finite element simulation of a tunnel excavation, with its effectiveness being finally verified.

Key words: tunnel, pre-support, homogenization, transverse isotropy