院报 ›› 2014, Vol. 31 ›› Issue (12): 69-73.DOI: 10.3969/j.issn.1001-5485.2014.12.014

• 岩土工程 • 上一篇    下一篇

加筋喷混凝土拱肋支护效应的数值模拟

李金山,秦卫星,盛松涛,李贺   

  1. 长沙理工大学 水利学院,长沙 410004
  • 收稿日期:2013-07-20 修回日期:2014-12-05 出版日期:2014-12-01 发布日期:2014-12-05
  • 通讯作者: 秦卫星(1978-),男,湖北仙桃人,副教授,博士,研究方向为岩土体结构变形与控制技术,(电话)13787125416(电子信箱)starqwx008@163.com。
  • 作者简介:李金山(1989-),男,湖北宜昌人,硕士研究生,研究方向为岩土体结构变形与控制技术,(电话)15307494089(电子信箱)714543031@qq.com。
  • 基金资助:
    国家自然科学基金项目(51208062)

Numerical Analysis of Supporting Effects of the Reinforced Ribs
of Sprayed Concrete

LI Jin-shan, QIN Wei-xing, SHENG Song-tao, LI He   

  1. School of Hydraulic Engineering, Changsha University of Science &
    Technology, Changsha 410004, China)
  • Received:2013-07-20 Revised:2014-12-05 Online:2014-12-01 Published:2014-12-05

摘要: 挪威隧道施工法提出的加筋喷混凝土拱肋支护在国内外工程实践中被证明是一种经济、高效的软弱围岩支护结构。为更好地分析加筋喷混凝土拱肋对软弱围岩的支护效应,以挪威Finnfast海底隧道软弱围岩段为工程实例,结合围岩质量Q系统分类方法,利用有限差分法对比研究了采用和不采用加筋喷混凝土拱肋2种方案下软弱围岩的变形、应力分布规律及屈服区体积。研究结果表明加筋喷混凝土拱肋对软弱围岩具有良好的加固效果。

关键词: 软弱围岩, 加筋混凝土拱肋, 支护效应, 数值模拟

Abstract: The reinforced ribs of sprayed concrete(RRS) in the Norwegian Method of Tunneling has been proved to be an economical and efficient supporting structure for the weak surrounding rock engineering in China and abroad. The weak zone in the Finnfast subsea tunnel in Norway was taken as a case study to demonstrate the supporting effects of RRS on weak surrounding rock. In view of the Q system for the classification of surrounding rock quality, finite difference method was employed to compare the deformation, the stress distribution, and the yield volume of surrounding rock in the presence and in the absence of RRS. The results show that RRS has good supporting effects on weak surrounding rock.

Key words: weak surronding rock, reinforced ribs of sprayed concrete, supporting effects, numerical simulation

中图分类号: 

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