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2024 Vol.26, Issue 5 Preview Page

Technical Paper

Consideration of stress and load state changes using measurement results of a shield tunnel in operation

운용 중 쉴드터널 계측결과를 이용한 응력 및 하중상태 변화추이 고찰

Yong Hag Kim1
,
Kook Hwan Cho2*
김 용학1
,
조 국환2*
1Ph.D. Candidate, Dept. of Railway Construction Engineering, Seoul National University of Science and Technology
2Professor, Dept. of Railway Construction Engineering, Graduate School of Railway, Seoul National University of Science and Technology
1정회원, 서울과학기술대학교 철도전문대학원 박사과정
2정회원, 서울과학기술대학교 철도전문대학원 철도건설공학과 교수
*Corresponding Author
30 September 2024. pp. 463-476
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Abstract

The shield TBM method can eliminate environmental hazards such as noise and vibration, and is environmentally friendly and allows safe tunnel construction even in soft ground conditions, but there are many restrictions on its application due to its high construction costs compared to the NATM. Therefore, in order to increase the applicability of the shield TBM method, it is necessary to ensure economic efficiency by reducing construction costs, and it is very important to reduce segment construction costs, which account for the largest proportion of shield TBM tunnel construction costs at about 35 to 40%. As part of this, this paper considers the changes in segment stress during tunnel construction and operation, tunnel external load conditions, etc. through analysis of long-term measurement data of shield TBMs in Japan, which has abundant experience in shield TBM construction, and compares and analyzes the differences between predicted values ​​at the design stage and measured values ​​during operation. Through this, we study improvements to ensure segment economic efficiency at the shield TBM design stage.

Keywords
Shield TBM
Measurement
Segment

쉴드 TBM 공법은 소음 ‧ 진동 등의 환경위해요소를 배재할 수 있어 친환경적이며 연약한 지반조건에서도 안전한 터널건설이 가능하지만 기존 NATM 공법에 비해 고가의 공사비로 인해 적용에 많은 제약이 있다. 따라서 쉴드 TBM 공법의 적용성을 높이기 위해서는 공사비 절감을 통한 경제성 확보가 필요하며 이중 쉴드 TBM 터널 공사비의 약 35~40%로 가장 큰 비중을 차지하고 있는 세그먼트 공사비 절감이 매우 중요하다. 그 일환으로 본 논문에서는 쉴드 TBM 시공경험이 풍부한 일본의 쉴드 TBM 장기계측 데이터 분석을 통하여 터널 시공 및 운용 중 세그먼트 응력, 터널외부하중 조건 등의 변화추이를 고찰하고 설계단계의 예상치와 운용 중 계측값의 차이를 비교분석하였다. 이를 통하여 쉴드 TBM 설계단계에서 세그먼트 경제성 확보를 위한 개선사항을 연구하고자 한다.

키워드
쉴드 TBM
계측
세그먼트
References
1

Ariizumi, T., Okadome, K., Nagay, J. (1998), "Result and analysis on site measurement of load acting on shield tunnel", Journal of Tunnel Engineering, JSCE, Vol. 8, pp. 367-372.

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2

Kim, H.M., Kim, H.S., Shim, K.M., Ahn, S.Y. (2017), "A study on the factors influencing the segment lining design solved by beam-spring model in the shield tunnel", Journal of Korean Tunnelling and Underground Space Association, Vol. 19, No. 2, pp. 179-194.

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3

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4

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5

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6

Yahagi, S., Fujiki, I., Oishi, K., Saitou, M., Arai, T. (2004), "Long-term on-site measurement of railroad shield tunnel in diluvial deposits", Journal of Tunnel Engineering, JSCE, Vol. 14, pp. 139-149.

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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 : 26
  • No :5
  • Pages :463-476
  • Received Date : 2024-07-25
  • Revised Date : 2024-08-30
  • Accepted Date : 2024-09-01
  • DOI :https://doi.org/10.9711/KTAJ.2024.26.5.463
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