한국터널지하공간학회 논문집 (Journal of Korean Tunnelling and Underground Space Association)

  • 제25권2호
  • /
  • Pages.157-173
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  • 2023
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  • 2233-8292(pISSN)
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  • 2287-4747(eISSN)
한국터널지하공간학회 (Korean Tunnelling and Underground Space Association)
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무진동 굴착구간에서의 시공성 향상을 위한 미진동 전자발파공법 평가

Evaluation of low-vibration electronic detonator blasting method to improve constructability in non-vibration excavation section

  • 정승원 ((주)한화/글로벌 IS영업팀 기술지원파트) ;
  • 송진혁 ((주)한화/글로벌 IS영업팀 기술지원파트) ;
  • 황남순 ((주)한화/글로벌 IS영업팀 기술지원파트) ;
  • 김현기 (서울특별시 도시기반시설본부 도시철도사업부) ;
  • 김남수 ((주)엔에스비 나우이엔씨) ;
  • 이종우 ((주)엔에스비 나우이엔씨)
  • Seung-won Jung (Technical Service Part, IS Business Team, Hanwha Coporation/Global) ;
  • Jin-Hyuk Song (Technical Service Part, IS Business Team, Hanwha Coporation/Global) ;
  • Nam-Sun Hwang (Technical Service Part, IS Business Team, Hanwha Coporation/Global) ;
  • Hyun-Gi Kim (Rapid Transit Business Division, Seoul Metropolitan Infrastructure Headquarters) ;
  • Nam-Soo Kim (NSB NOW E&C) ;
  • Jong-woo Lee (NSB NOW E&C)
  • 투고 : 2023.03.09
  • 심사 : 2023.03.25
  • 발행 : 2023.03.31
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초록

본 현장은 265 m 구간이 무진동 굴착공법으로 설계되어 있지만 시공성과 경제성의 저하가 우려된다. 이러한 이유로 미진동 전자발파공법이 제안되었다. 미진동 전자발파의 적용성 평가를 위해서 본 현장 직전 적용하였던 미진동 전자발파(제안 I)와 본 현장과 같이 지하철 근거리에서 시공된 미진동 전자발파(제안 II)의 발파진동 영향범위를 분석하였다. 두 제안의 발파진동 영향범위 비교결과, 제안 II의 영향범위가 더 보수적으로 산출되었다. 본 현장의 근거리라는 특수성을 고려할 때, 보다 안전한 시공을 위해 설계변경에 제안 II를 선정하였다. 결과적으로 무진동 굴착구간 265 m 구간 중 72 m 구간에 대하여 미진동 전자발파공법으로 변경하여도 구조물에 미치는 영향이 없을 것으로 예측된다. 그리고 총 예상 굴진 소요 기간 662.5일에서 144일 단축할 수 있기 때문에 높은 경제적 이익을 얻을 수 있다고 평가된다.

Although this site is designed with a non-vibration excavation method for a section of 265 m, there are concerns about decline of constructability and economic feasibility. For this reason, the low-vibration electronic detonator blasting method was suggested. To evaluate the applicability of the low-vibration electronic detonator blasting method, the damage range of blasting vibration of low-vibration electronic detonator blasting applied just before the site (suggestion I) and low-vibration electronic detonator blasting constructed close range the subway like this site (suggestion II) was analyzed. As a result of comparing the blasting vibration damage ranges of the two suggestions, the damage range of suggestion II was calculated more conservatively. Considering the specificity of the close range of this site, suggestion II was selected for design change for safer construction. As a result, it is predicted that there will be no damage to the structure even if the 72 m section out of the non-vibration excavation 265 m section is changed to the Low-vibration electronic detonator blasting. And it is evaluated that high economic benefits can be obtained because the total expected excavation period can be reduced by 144 days from 662.5 days.

키워드

참고문헌

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