Abstract
도심지 근접시공 발파에는 진동 소음에 따른 민원의 문제가 주요시된다. 발파 진동 소음을 줄이기 위해 최근에 국내에 도입된 전자뇌관을 사용하여 데크차지 공법에 적용하면 cut off 등과 같은 현상이 없어져서 안전한 시공이 가능하고, 또한 수평방향으로 발파가 가능해져서 대규모 발파가 가능해진다. 본 연구에서는 전자뇌관을 사용한 수평방향데크차지 공법의 효율을 기존 공법의 것과 비교해보고, 현장적용 가능성을 평가해보았다. 그 결과 발파 진동 소음과 2차 파쇄량의 감소를 확인하였고, 뿐만 아니라 전반적으로 발파 효율이 증가하여 진동 규제 기준치 내에서 대규모 발파가 가능함을 확인하였다. In close to downtown construction, the main problem is complaints caused by blasting vibration and noise. To reduce blasting vibration and noise, deck-charge blasting method using electronic detonator can be more secure because there is no cut-off problem. And in this method it is possible to blast in horizontal direction. In this study, the efficiency of horizontal direction deck-charge blasting method using electronic detonator is compared to that of the existing blasting method. And the possibility of applying the construction site is evaluated. As a result, the reduction of blasting vibration, noise and secondary breaking has been determined, as well as large-scale blasting in the vibration criterion can be regulated by the overall increase in blasting efficiency.
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