터널에서의 여굴 저감 방안에 관한 연구

초록

Overbreak is an inevitable during tunnel excavation. It significantly affects tunnel construction cost and safety. The overbreak occurs due to incorrect expectations to the geologic structures, excessive charge or strength of explosives, etc. This paper introduces multi-hole drilling method to minimize the overbreak in tunnel excavation. Although the drilling cost of the method is more expensive than those of the existing other drilling method, it is expected that total cost will be reduced.

키워드