A FEM-based numerical study of responses of underground openings subject to plane, cylindrical, compressive and tensile waves

被引：0

作者：

Liao, Z. Y. ^{[1
]}

Lam, N. M. ^{[1
]}

Zhu, J. B. ^{[1
,2
]}

机构：

[1] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China

[2] Tianjin Univ, Sch Civil Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin, Peoples R China

来源：

ROCK DYNAMICS: FROM RESEARCH TO ENGINEERING | 2016年

关键词：

Underground opening; Rock Joint; Peak particle velocity; FEM;

D O I：

暂无

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

A FEM-based numerical study is carried out to investigate the dynamic responses of underground openings in jointed rock masses. The heterogeneity and damage process of rocks are taken consideration in the numerical study. Effects of joint normal stiffness, joint spacing, joint orientation, amplitude of applied stress wave, cylindrical wave and tensile wave on the measured Peak Particle Velocity (PPV) around the tunnel are addressed. The simulation results show that the existence of joints has great influence on the stability of the underground tunnel. In addition, the cylindrical wave decays quickly due to both geometrical attenuation and joint reflection. The PPVs around the tunnel are highly dependent on the source location of the cylindrical wave and the wave amplitude. Furthermore, the large-amplitude tensile wave is difficult to transmit across the joints, because of the caused opening of joints. However, for the shallow buried tunnel, the reflected tensile waves from the ground surface may still lead to the instability of tunnel.

引用

页码：355 / 360

页数：6