华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (12): 127-131,139.

• 土木建筑工程 • 上一篇    下一篇

超前支护的均一化横观各向同性弹性模型

王海波 徐明 宋二祥   

  1. 清华大学 结构工程与振动教育部重点实验室, 北京 100084
  • 收稿日期:2009-01-20 修回日期:2009-04-27 出版日期:2009-12-25 发布日期:2009-12-25
  • 通信作者: 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
  • 作者简介:王海波(1980-),男,博士生,主要从事地下工程数值模拟技术研究.
  • 基金资助:

    国家自然科学基金资助项目(50808109)

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)

摘要: 超前支护(包括管棚和小导管注浆)是隧道开挖中保持地层稳定及控制其变形的重要手段,在模拟分析中需要妥善予以考虑.如何采用既简单合理又能考虑其整体效应的模型是超前支护数值模拟的重点.为此,文中提出了一个均一化的横观各向同性弹性模型,研究了超前支护的平均弹性性质,并在此基础上提出了简化模型,该模型能够用来分析钢管的间距、管径等重要影响因素。最后,应用简化模型对某隧道开挖进行了三维有限元数值模拟,验证了模型的有效性.

关键词: 隧道, 超前支护, 均一化, 横观各向同性

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