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2013 Vol.15, Issue 5
Analysis on the characteristics of the earth pressure distribution induced by the integrated steel pipe-roof construction

일체형 강관 파이프루프 시공에 따른 주변 지반의 토압 분포 특성 분석

Youngjong Sim1
,
Kyu-Nam Jin2
,
Ki-Il* Song3*
심 영종1
,
진 규남2
,
송 기일*3*
1Land and Housing Institute, Korea Land and Housing Corporation, Research Fellow
2Land and Housing Institute, Korea Land and Housing Corporation, Senior Research Fellow
3Inha University, Dept. of Civil Engineering, Assistant Professor
1한국토지주택공사 토지주택연구원 건설환경연구실 수석연구원
2한국토지주택공사 토지주택연구원 건설환경연구실 연구위원
3인하대학교 사회기반시스템공학부 토목공학전공 교수
*교신저자. *Corresponding Author. 
30 September 2013. pp. 455-468
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Abstract

In recent, various types of steel pipe-roof methods, which is reinforced by mortar after propulsion of steel pipe into the ground, have been used for the construction of trenchless underpass. Integrated steel pipe-roof has flexural stiffness and can resist against overburden load and reduce the stress acting on the concrete underpass structures. Due to arching effect, vertical and horizontal stress distribution around the steel pipe-roof is changing. In this study, therefore, the characteristic of stress distribution around the underpass induced by the construction of integrated steel pipe-roof is investigated by using numerical method. To examine the soil-structure interaction, interface element is introduced. Results show that vertical stress acting on the concrete structure placing inside the steel pipe-roof is significantly reduced due to arching effect and flexural stiffness of integrated steel pipe-roof. Design load can be reduced and effective design of underpass will be available if the earth pressure reduction due to arching effect is considered in the design stage.

Keywords
Trenchless construction
Integrated steel pipe-roof
Flexural stiffness
Arching effect

최근 비개착공법으로 지하차도 시공 시 강관을 지반에 압입한 후 강관자체를 철근과 모르타르로 보강하는 다양한 일체형 파이프루프 공법이 적용되고 있다. 이러한 일체형 파이프루프 공법은 상재하중에 대해 지보강성 효과를 발휘하여 콘크리트 지하차도 구조물에 작용하는 응력을 한층 감소시킬 것으로 예상된다. 또한 아칭효과에 의해 주변지반의 연직방향 및 수평방향의 토압이 변화하게 된다. 본 연구에서는 일체형 파이프루프 시공에 따른 주변지반의 토압 분포 특성을 분석하고, 일체형 파이프루프 내측에 시공되는 콘크리트에 작용하는 토압을 분석하기 위하여 유한차분 수치해석을 통해 파이프루프의 체결 특성을 모델링하고 응력 및 변위거동을 분석하였다. 지반과 구조물의 경계에 인터페이스 요소를 도입하여 지반구조물의 상호작용을 분석하였다. 분석 결과, 본체 콘크리트 구조물에 작용하는 연직토압은 파이프루프의 강성과 아칭 작용에 의해 원상태의 연직토압보다 큰 폭으로 감소하여 작용하는 것을 확인하였다. 지하차도 구조물의 단면 설계 시 설계하중에 대해 이러한 아칭작용에 의한 연직토압의 감소를 고려한다면 경제성을 보다 확보할 수 있을 것으로 판단된다.

키워드
비개착공법
일체형 파이프루프
휨강성
아칭효과
References
1
1.Ahuja, V., Sterling, R.L. (2008), “Numerical modelling approach for microtunnelling assisted pipe-roof support system”, World Tunnel Congress 2008 - Underground Facilities for Better Environment and Safety, pp. 1678-1687.
2
2.Cho, S.K., Lee, J.M., Son, H.D., Kim, J.S., Park, D.H. (2008), “Evaluation of pullout strength at the connection of S.T.S method”, The 34th KSCE Annual Conference Civil Expo 2008, pp. 89-92.
3
3.Choi, S.W., Park, Y.T., Chang S.H., Bae, G.J., Lee, K.T., Baek, Y.K. (2012), “A numerical study on the three-dimensional ground movement by the trenchless construction method of concrete box by a square steel pipe supporting system”, J of Korean Tunn and Undergr Sp Assoc, Vol. 14, No. 5, pp. 469-484.
4
4.Choi, S.W., Park, Y.T., Chang S.H., Bae, G.J., Lee, K.T., Baek, Y.K. (2012), “An experimental study on the ground movement around a square pipe by its penetration for trenchless construction in sandy ground”, J of Korean Tunn and Undergr Sp Assoc, Vol. 14, No. 5, pp. 485-501.
5
5.Eum, K.Y., Choi, C.Y., Cheon, J.Y. (2010), “Analysis of heaving and settlement test of scale model depending on shape of the pipe during pipe roof excavation”, J. Korean Geotynthetics Society, Vol. 9, No. 4, pp. 9-15.
6
6.Hisatake, M., Ohno, S. (2008), “Effects of pipe roof supports and the excavation method on the displacements above a tunnel face”, Tunnel. Under. Space Tech, Vol. 23, pp. 120-127.
7
7.KCI (2007), “Manual for concrete structure design”, Korea Concrete Institute.
8
8.Kimura, H., Itoh, T., Iwata, M., Fujimoto, K. (2005), “Application of new urban tunneling method in Baikoh tunnel excavation”, Tunnel. Under. Space Tech. Vol. 20, pp. 151-158.
9
9.KRTA (2010), “Design criterion for the highway bridges”, Korea Road & Transportation Association.
10
10.Lee, Y.B., Kim, J.Y., Park, I.J., Kim, K.G., Lee, J.H. (2003), “A study on the applicability of under ground structure using steel tubular roof in Korean geotechnical condition”, J of Korean Tunn and Undergr Sp Assoc, Vol. 5, No. 4, pp. 401-409.
11
11.Sim, Y.J., Jin, K.N., Lee, K.H. (2013), “Measurement of Earth Pressure around Underpass by Non-open- cut Method”, KGS Spring National Conference 2013, March 21-22, 2013.
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 : 15
  • No :5
  • Pages :455-468
  • Received Date : 2013-06-05
  • Revised Date : 2013-07-18
  • Accepted Date : 2013-07-30
  • DOI :https://doi.org/10.9711/KTAJ.2013.15.5.455
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