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中南大学学报(自然科学版)

Journal of Central South University

第43卷    第2期    总第210期    2012年2月

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文章编号:1672-7207(2012)02-0651-05
考虑岩体损伤和注浆加固效应的单元稳定性
黎永索1, 2,张可能2

(1. 湖南城市学院 土木工程学院,湖南 益阳,413000;
2. 中南大学 地球科学与信息物理学院,湖南 长沙,410083
)

摘 要: 为了研究注浆对节理岩体损伤的加固效应,从微观角度出发,引入岩体修复因子的概念,构建考虑岩体损伤和注浆加固效应的单元安全系数,以判断岩体的稳定性;然后,利用FLAC3D软件建立数值计算模型,采用FISH语言二次开发单元安全系数程序,得到隧道开挖后围岩不同部位的单元安全系数,将其与FLAC3D软件所得的的塑性区分布进行对比。研究结果表明:单元安全系数Fs≤1的区域与FLAC3D计算得到的塑性区分布范围一致,验证了所推导的单元安全系数计算公式以及自编程序的正确性。

 

关键字: 隧道岩体;损伤;注浆;单元安全系数

Element stability of rock mass considering its damage and
reinforcement effect by grouting
LI Yong-suo1, 2, ZHANG Ke-neng2

1. School of Civil Engineering, Hunan City University, Yiyang 413000, China;
2. School of Geosciences and Info-physics, Central South University, Changsha 410083, China

Abstract:In order to study the reparation effect of grouting in jointed rock mass, the repairing factor was introduced in microscopic way to the analysis for jointed rock mass, the element safety factor of tunnel rock mass considering the damage and reinforcement effect was founded to study the stability state of rock mass. The numerical calculation software FLAC3D with the internal FISH program was adopted to compile the program for the element safety factor of tunnel rock mass to obtain the element safety factor for different areas of rock mass after tunnel excavation, and the results were compared with those from the plastic zone distribution. The results show that the area of element safety factor Fs≤1 and the area of plastic zone distribution calculated by FLAC3D are almost the same, which validates the correctness of the deduced equation for the element safety factor based on the Barton criterion parameters and the program built.

 

Key words: tunnel rock mass; damage; grouting; element safety factor

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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