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

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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A study on the excavation cycle by the drill-and-blast method for a room-and-pillar underground structure

주방식 지하구조물의 발파 굴착공정 분석 연구

  • Lee, Chul-Ho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Hyun, Young-Hwan (ESCO Consultant & Engineers Co., Ltd) ;
  • Hwang, Je-Don (ESCO Consultant & Engineers Co., Ltd) ;
  • Choi, Soon-Wook (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, Tae-Ho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Chang, Soo-Ho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
  • 이철호 (한국건설기술연구원 지반연구소) ;
  • 현영환 ((주)에스코컨설턴트) ;
  • 황제돈 ((주)에스코컨설턴트) ;
  • 최순욱 (한국건설기술연구원 지반연구소) ;
  • 강태호 (한국건설기술연구원 지반연구소) ;
  • 장수호 (한국건설기술연구원 지반연구소)
  • Received : 2016.10.25
  • Accepted : 2016.11.16
  • Published : 2016.11.30
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Abstract

Since a room-and-pillar underground structure is characterized by its grid-type array of room and pillar, its economical efficiency can be governed by excavation sequence. In this study, the construction period by the drill-and-blast method as a excavation method for a room-and-pillar underground structure was examined. In addition, the parallel excavation sequence was considered as the main sequence of a room-and-pillar underground structure. Sequences of mucking and support installation were derived to estimate the total excavation cycle by taking the case of a road tunnel into consideration. From the excavation cycle of room-and-pillar underground structure, the relationship between available maximum and minimum numbers of jumbo drill machines depending on the number of faces in operation was suggested.

주방식 지하구조물은 룸과 암주로 이루어진 격자 형태의 지하구조물로 굴착순서에 따라 주방식 지하구조물의 시공성과 경제성이 좌우될 수 있다. 선행연구에서는 주방식 지하구조물의 굴착공정에서 중요하게 다뤄질 수 있는 발파굴착 공정을 장비 운영과 현행 발파 규정 및 건설공사 표준품셈에 근거하여 검토하였다. 굴착공법으로는 점보드릴을 이용한 발파공법을 가정하였으며, 기존 연구에서 제시한 가로 세로 병행시공방식으로 검토하였다. 연구에서 고려한 단면의 크기에 따라 필요한 착암 공정에 대한 천공시간을 산정하였으며 기존 도로터널 사례를 통해 버력처리 및 지보재 설치 공정의 소요시간을 산정하였다. 굴진면 운용 수를 고려하여 굴착 사이클을 산출하였으며 이를 통해 운영가능한 천공장비의 최대 대수와 최소 대수를 수식화하여 제시하였다.

Keywords

References

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