바로가기메뉴

본문 바로가기 주메뉴 바로가기

ACOMS+ 및 학술지 리포지터리 설명회

  • 한국과학기술정보연구원(KISTI) 서울분원 대회의실(별관 3층)
  • 2024년 07월 03일(수) 13:30
사전등록 바로가기
 

logo

ISSN : 2233-8292

논문 상세

이전 다음
논문 투고

Vol.20 No.4

Citation Share

3차원 형상을 고려한 점성토 지반 원형 수직구 굴착 중 히빙에 대한 안전율 산정을 위한 연구

A study for calculating factor of safety against basal heave during circular vertical shaft excavation in clay considering 3D shape

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2018, v.20 no.4, pp.717-729
https://doi.org/10.9711/KTAJ.2018.20.4.717
강석준 (한국과학기술원)
조계춘 (한국과학기술원)
김정태 (한국과학기술원)
김한성 (한국과학기술원)
홍은수 (한국과학기술원)
강석준, 조계춘, 김정태, 김한성, & 홍은수. (2018). 3차원 형상을 고려한 점성토 지반 원형 수직구 굴착 중 히빙에 대한 안전율 산정을 위한 연구. (사)한국터널지하공간학회, 20(4), 717-729, https://doi.org/10.9711/KTAJ.2018.20.4.717

초록

연약지반 수직구 굴착 중에는 주변 지반의 하중으로 인한 굴착면의 히빙이 발생할 위험이 있기 때문에 굴착 설계 시 지반안정성에 대한 고려가 필수적이다. 그러나 연약지반 히빙 안전율 산정은 2차원 산정식으로 수행하여야 하므로 수직구의3차원 형상을 고려하지 못하는 문제가 있다. 본 연구에서는 수직구 굴착 시 히빙 안전율에 대한 선행 연구를 보완하여 3 차원 효과를 반영하는 히빙에 대한 안전율 식을 제안하였으며, 해당 식이 기존 식에 비해 3차원 원형 수직구 굴착에서의히빙 안정성을 더 적절하게 반영할 수 있음을 확인하였다.

keywords
Circular vertical shaft, Basal heave, Factor of safety, 3D effect, Numerical analysis, 원형수직구, 히빙, 안전율, 3차원 효과, 수치해석

Abstract

Considering the stability of the ground in the process of excavation design is essential because there is a risk of basal heave due to the load of the surrounding ground during the vertical excavation. However, calculation of the factor of safety for basal heave should be performed with two-dimensional equation, and the equation cannot reflect three-dimensional shape of vertical excavation. In this study, an equation for factor of safety for the basal heave was proposed with considering the effect of three-dimensional shape. It is confirmed that the equation can more appropriately reflect the basal heave stability 3D circular vertical excavation than the existing equation. Using the equation proposed in this study, it is possible to derive an appropriate factor of safety according to the 3D excavation shape during the circular vertical shaft excavation.

keywords
Circular vertical shaft, Basal heave, Factor of safety, 3D effect, Numerical analysis, 원형수직구, 히빙, 안전율, 3차원 효과, 수치해석

참고문헌

1.

Aksoy, C.O. (2008), "Chemical injection application at tunnel service shaft to prevent ground settlement induced by groundwater drainage: A case study", International Journal of Rock Mechanics and Mining Sciences, Vol. 45, No. 3, pp. 376-383.

2.

Bjerrum, L., Eide, O. (1956), "Stability of strutted excavations in clay", Geotechnique, Vol. 6, No. 1, pp. 32-47.

3.

Center for Utility Tunnel (2015), Development of core technology for urban small-diameter utility tunnel construction.

4.

Hong, E.S., Cho, G.C., Baak, S., Jun, H.W. (2016), "Rapid construction technique development for vertical shafts of utility tunnels", Proceedings of the KTA 2016 Annual Spring Conference, Seoul, pp. 129-130.

5.

Kim, D.H., Lee, D.S., Kim, K.Y., Lee, Y.H., Lee, I.M. (2009), "Earth pressure acting on vertical circular shafts considering arching effects in <TEX>$c-{\varphi}soils$</TEX>: I. Theory", Journal of Korean Tunnelling and Underground Space Association, Vol. 11, No. 2, pp. 117-129.

6.

Kim, D.H., Lee, K.H., Lee, I.M. (2011), "Seepage-induced behavior of a circular vertical shaft", Journal of Korean Tunnelling and Underground Space Association, Vol. 13, No. 6, pp. 431-450.

7.

Kim, K.Y., Lee, D.S., Jeong, S.S. (2012), "Analysis of earth pressure acting on vertical circular shaft considering aching effect (I): a study on centrifuge model tests", Journal of the Korean Geotechnical Society, Vol. 28, No. 2, pp. 23-31.

8.

Shin, Y.W., Kim, S.S., Kim, Y.J. (2010), "Development of design charts for concrete lining in a circular shaft", Journal of Korean Tunnelling and Underground Space Association, Vol. 12, No. 2, pp. 165-175.

9.

Shin, Y.W., Park, T.S., Lee, I.K. (2005), "A method of estimating earth pressure on a shaft wall and ground settlement caused by excavation", Proceedings of the KSCE Tunnel Committee Special Conference, pp. 151-167.

10.

Shin, Y.W., Sagong, M. (2007), "A rational estimating method of the earth pressure on a shaft wall considering the shape ratio", Journal of Korean Tunnelling and Underground Space Association, Vol. 9 No. 2, pp. 143-155.

11.

Tan, Y., Wang, D. (2013), "Characteristics of a large-scale deep foundation pit excavated by the central-island technique in Shanghai soft clay. I: Bottom-up construction of the central cylindrical shaft", Journal of Geotechnical and Geoenvironmental Engineering, Vol. 139, No. 11, pp. 1875-1893.

12.

Terzaghi, K., Peck, R. (1948), Soil mechanics in engineering practice, John Wile and Sons, New York.

(사)한국터널지하공간학회

논문 투고 OA 정책