• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2011, Vol. 31 ›› Issue (S1): 186-191.

• 研究与探索 • 上一篇    下一篇

岩栓对隧道支撑功效之数值探讨

刘晓桦1,王泰典2,黄灿辉1   

  1. (1.台湾大学, 台北; 2.台北科技大学, 台北)
  • 收稿日期:2011-04-15 出版日期:2011-08-05 发布日期:2011-11-04
  • 作者简介:刘晓桦(1986—),台北,2011年毕业于台湾大学土木工程学系,硕士。

Numerical Elucidating on Rockbolt Effects for Tunnel Support

LIU Hsiaohua1, Wang Taitien2, Huang Tsanhwei1   

  1. (1. National Taiwan University, Taipei; 2. National Taipei University of Technology, Taipei)
  • Received:2011-04-15 Online:2011-08-05 Published:2011-11-04

摘要: 基于一非线性规则节理岩体组成模式,透过数值仿真途径探讨岩栓对于岩石隧道的支撑功效。所采用的岩体组成模式考虑岩石材料与节理面的力学特性以及节理面的空间分布,不仅可模拟节理岩体的完整应力应变曲线,亦可描述节理面所造成的强度与变形异向性。数值模拟结果发现,岩栓可增加特定位置的节理面正向应力,进而提高其强度与劲度,束制节理面移动与剪胀,发挥其对隧道的支撑功效。

关键词: 节理岩体, 隧道, 支撑, 岩栓, 节理面剪位移, 剪胀

Abstract: This study elucidates the effects of rockbolt support in modern tunnel via a numerical simulation which based on a threedimensional nonlinear constitutive model. The constitutive model takes the mechanical behavior of intact rock, the orientations of joint sets, and the mechanical behavior of joint planes into account, and therefore is capable of describing complete stressstrain relationship and strength and deformability anisotropies of rock masses induced by joint sets. Numerical simulation results show that rockbolts increase the normal stress acting on joints in specific locations and thus enhance their shear strength, resulting in constraining shear displacement and dilation of the joints. The support effects of rockbolt on tunnel are then mobilized and elucidated qualitatively.

Key words: jointed rock masses, tunnel, support, rockbolt, joint shear displacement, dilation