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SUMMARY:A New Tunnel Excavation Method for Reducing Blasting-Induced Vibra
 tion and Damaged Zone – Precutting of Tunnel Perimeter Using Abrasive Wa
 terzet - Gye-Chun Cho\, Ph.D.\, Associate Professor\, Dept. of Civil and E
 nv. Eng.\, Korea Advanced Institute of Science and Technology (KAIST)
DTSTART:20110720T150000Z
DTEND:20110720T160000Z
UID:TALK32068@talks.cam.ac.uk
CONTACT:Zelda Stuck
DESCRIPTION:The drilling and blasting method has been widely and cost-effe
 ctively used in the construction of tunnels particularly through hard rock
 s. Unfortunately\, its use is often restricted in urban areas because of b
 lasting-induced vibration and noise. This study presents an innovative vib
 ration-reduced excavation method which combines the conventional blasting 
 technique with the abrasive waterzet-aided precutting of a tunnel perimete
 r. Experimental tests and three dimensional numerical simulations are perf
 ormed to demonstrate the feasibility of this method. When the new method i
 s used in practice\, it is expected that the construction cost will decrea
 se due to a decrease in the number of drilling holes\, explosive charging 
 weight\, overbreak space\, and excavation-damaged zone\, which enhances th
 e safety of tunnel construction and ultimately minimizes public claims. 
LOCATION:Engineering Department - Lecture Room 5
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