Geomechanics and Engineering

  • 제15권2호
  • /
  • Pages.755-767
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  • 2018
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Innovative approach to determine the minimum wall thickness of flexible buried pipes

  • Alzabeebee, Saif (Department of Civil Engineering, University of Birmingham) ;
  • Chapman, David N. (Department of Civil Engineering, University of Birmingham) ;
  • Faramarzi, Asaad (Department of Civil Engineering, University of Birmingham)
  • 투고 : 2017.07.31
  • 심사 : 2017.11.30
  • 발행 : 2018.06.10
⟨ 이전 논문 다음 논문 ⟩

초록

This paper uses a finite element based approach to provide a comprehensive understanding to the behaviour and the design performance of buried uPVC pipes with different diameters. It also investigates pipes with good and poor haunch support and proposes minimum safe wall thicknesses for these pipes. The results for pipes with good haunch support showed that the maximum pipe wall stress and deformation increase as the diameter increased. The results for pipes with poor haunch support showed an increase in the dependency of the developed vertical displacement on the haunch support as the diameter or the backfill height increased. Additionally, poor haunch support was found to increase the soil pressure, with the effect increasing as the diameter increased. The design of uPVC pipes for both poor and good haunch support was found to be governed by critical buckling. A key outcome is a new design chart for the minimum wall thickness, which enables the robust and economic design of buried uPVC pipes. Importantly, the methodology adopted in this study can also be applied to the design of flexible pipes manufactured from other materials, buried under different conditions and subjected to different loading arrangements.

키워드

과제정보

연구 과제 주관 기관 : higher committee for education development in Iraq (HCED)

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