ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2017, Vol. 37 ›› Issue (3): 315-320.DOI: 10.3973/j.issn.1672-741X.2017.03.009
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LI Ziyuan, WANG Hailiang
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Abstract:
In order to study the influence of shorthole pressure relieving and vibration reduction method on the blasting vibration reduction effect of peripheral holes, the tunnel crosssection model before and after setting pressure reducing short holes are calculated and analyzed by ANSYSDYNA numerical simulation software; the blasting tests are carried out on tunnel crosssection before and after setting pressure reducing short holes; and then comparison is made on vibration velocity diagrams collected before and after setting of pressure reducing short holes. The results show that: 1) The blasting vibration velocity of peripheral holes after using shorthole pressure relieving and vibration reduction method is smaller than that before using shorthole pressure relieving and vibration reduction method. 2) The tunnel excavation contour line goes smooth and shaped; and the overbreak and underbreak times have been reduced by using shorthole pressure relieving and vibration reduction method.
Key words: Metro tunnel, blasting of peripheral holes, shorthole pressure relieving and vibration reduction method, numerical simulation, test, vibration velocity
CLC Number:
U 455.41
LI Ziyuan, WANG Hailiang. Study of Influence of Shorthole Pressure Relieving and Vibration Reduction Method on Blasting Vibration Reduction Effect of Peripheral Holes[J]. Tunnel Construction, 2017, 37(3): 315-320.
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URL: http://www.suidaojs.com/EN/10.3973/j.issn.1672-741X.2017.03.009
http://www.suidaojs.com/EN/Y2017/V37/I3/315
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