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2018 Vol.20, Issue 4 Preview Page
Suggestion of empirical formula between FPI and specific energy through analysis of subsea tunnel excavation data

해저 터널 굴진자료 분석을 통한 FPI와 비에너지의 경험식 제시

Kyoung-Yul Kim1*
,
Du-San Bae2
,
Seon-Ah Jo3
,
Hee-Hwan Ryu4
김 경열1*
,
배 두산2
,
조 선아3
,
류 희환4
1Principal Researcher, Korea Electric Power Corporation R.I.
2Researcher, Korea Electric Power Corporation R.I.
3Post-Doctoral Researcher, Korea Electric Power Corporation R.I.
4Senior Researcher, Korea Electric Power Corporation R.I.
1정회원, 한전전력연구원 책임연구원
2비회원, 한전전력연구원 일반연구원
3정회원, 한전전력연구원 박사 후 연구원
4정회원, 한전전력연구원 선임연구원
* Corresponding Author
31 July 2018. pp. 687-699
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Abstract

The construction of subsea tunnel differs from that of inland tunnel because of high water pressure due to sea water level and difficulties to reinforce the ground under construction. Therefore, it is very important to prevent trouble in advance when the subsea tunnel is constructed. In this paper, we established lots of databases about characteristics of geological and mechanical parameters on the construction of subsea tunnel using micro slurry TBM which depth is about 60 m. The correlation analysis is conducted to confirm the effect of thrust, torque and RPM among the excavation database on the net penetration rate. Also, An empirical formula is suggested to predict the net penetration rate through the correlation analysis between FPI (Field Penetration Index) and specific energy from the subsea tunnel excavation database.

Keywords
Subsea tunnel
Slurry TBM
Face pressure
Specific energy
Excavation parameter

해저터널의 시공은 육상터널의 시공과 몇 가지 다른 부분이 존재하는데 지하수 이외에 해수가 존재하여 고수압을 받으며, 시공 중 지반보강이 육상터널보다 매우 어려운 점 등이 대표적이다. 그러므로 해저터널 시공 시 시공트러블 발생의 예방은 매우 중요하다. 본 고에서는 서해안 해저 약 60 m에 시공한 소형 슬러리 TBM의 굴진 성능을 분석하기 위하여 대상 지반의 지질학적 특성들과 기계적 특성들을 DB로 구축하였다. 구축한 DB 중 추력, 토크 및 RPM 등이 순 굴진율에 주는 영향을 확인하고자 각 변수들 간의 상관분석을 실시하였다. 또한 구축된 DB로부터 비에너지와 FPI와의 상관관계를 분석하고 순 굴진율을 예측할 수 있는 경험식을 제시하였다.

키워드
해저 터널
슬러리 TBM
막장압
비에너지
굴착 변수
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 20
  • No :4
  • Pages :687-699
  • Received Date : 2018-05-23
  • Revised Date : 2018-06-07
  • Accepted Date : 2018-06-14
  • DOI :https://doi.org/10.9711/KTAJ.2018.20.4.687
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