A New Tunnel Excavation Method for Reducing Blasting-Induced Vibration and Damaged Zone – Precutting of Tunnel Perimeter Using Abrasive Waterzet

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• Gye-Chun Cho, Ph.D., Associate Professor, Dept. of Civil and Env. Eng., Korea Advanced Institute of Science and Technology (KAIST)
• Wednesday 20 July 2011, 16:00-17:00
• Engineering Department - Lecture Room 5.

If you have a question about this talk, please contact Zelda Stuck.

The drilling and blasting method has been widely and cost-effectively used in the construction of tunnels particularly through hard rocks. Unfortunately, its use is often restricted in urban areas because of blasting-induced vibration and noise. This study presents an innovative vibration-reduced excavation method which combines the conventional blasting technique with the abrasive waterzet-aided precutting of a tunnel perimeter. Experimental tests and three dimensional numerical simulations are performed to demonstrate the feasibility of this method. When the new method is used in practice, it is expected that the construction cost will decrease due to a decrease in the number of drilling holes, explosive charging weight, overbreak space, and excavation-damaged zone, which enhances the safety of tunnel construction and ultimately minimizes public claims.

This talk is part of the Engineering Department Geotechnical Research Seminars series.

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