Numerical study on tunnel damage subject to blast-induced shock wave in jointed rock masses

被引：151
作者：
Deng, X. F. [1 ,3 ]
Zhu, J. B. [2 ]
Chen, S. G. [3 ]
Zhao, Z. Y. [4 ]
Zhou, Y. X. [4 ,5 ]
Zhao, J. [6 ]
机构：
[1] China Tiesiju Civil Engn Grp Co LTD, Hefei 230023, Peoples R China
[2] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
[3] Southwest Jiaotong Univ, MOE Key Lab Transportat Tunnel Engn, Chengdu 610031, Peoples R China
[4] Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore
[5] Def Sci & Technol Agcy, Singapore 109679, Singapore
[6] Monash Univ, Dept Civil Engn, Melbourne, Vic 3800, Australia
来源：
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2014年 / 43卷
关键词：
Tunnel damage; Disturbed zones; Peak particle velocities; Joints; Initial stress; Scaled distance; Bolts; MULTIPLE PARALLEL FRACTURES; ZONE;
D O I：
10.1016/j.tust.2014.04.004
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this study, numerical modeling on the damage of existing circular tunnel subject to blast-induced shock wave was carried out with DEM-based code UDEC. The disturbed zones including failure zones, open zones and shear zones around circular tunnel and peak particle velocities (PPVs) at tunnel surface are employed to analyze the damage of tunnel. The effects of joint spatial and mechanical properties, initial stress of rock mass, and magnitude of shock wave amplitude to damage of tunnel were evaluated in this study. The difference of damage between non-supported circular tunnel and bolt-supported circular tunnel subject to the same blast-induced shock wave was also studied. It is found that the orientations of joints in rock mass around the tunnel have great effects on tunnel damage. The initial stress around tunnel has relatively small influence on tunnel damage. The bolt support could greatly increase the stability of tunnel by changing the vibration form of particle velocity rather than the decreasing of PPV. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：88 / 100
页数：13
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