Effects of Using EPS Geofoam as Compressible Inclusion on HDPE Pipe Behavior

Kılıç, Havvanur; Akınay, Emre

doi:10.1061/(asce)ps.1949-1204.0000368

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Pipe deflection can be defined as either vertical expansion and horizontal shortening or vertical shortening and horizontal expansion of the pipe diameter. To achieve this, researchers recommend the use of different low-stiffness materials (such as EPS) in different buried structures and burial depths, under different loading conditions and in various geometries [7][8][9][10][11][12]. While these materials significantly reduce stresses and pipe deflection, the resulting surface displacements are larger than of the original case [13].…”

Section: Introductionmentioning

confidence: 99%

Effects of Pipe Deflection and Arching on Stress Distribution and Lateral Earth Pressure Coefficient in Buried Flexible Pipes

Gulen,

Kilic

2024

Applied Sciences

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In this study, full-scale laboratory tests were conducted on a 315 mm diameter HDPE pipe under shallow buried and localised surface loading conditions to investigate the effects of pipe def The names and affiliations of the authors are spelled correctly. We confirm.lection and arching on stress distribution and the lateral earth pressure coefficient. The tests were validated using 2D finite element software, and further analyses were carried out through parametric studies. These studies considered variations in pipe stiffness, burial depth, backfill properties and pavement stiffness to increase the reliability of the test results. For a shallowly buried HDPE pipe, a comprehensive explanation is provided regarding the evolution of the lateral earth pressure coefficient within the central soil prism. Initially set at Ko conditions, this coefficient tends to shift towards Kp with increasing arching and transitions to Ka with weakening arching. The findings suggest that stress predictions in the crown region of shallow buried flexible pipes are achievable through the application of Terzaghi’s arching theory, contingent upon an accurate estimation of the lateral earth pressure coefficient for the central soil prism. Furthermore, the horizontal deflection of the pipe at the springline results in compressive behaviour and passive effects in the surrounding backfill in this specific region. This situation demonstrates that the horizontal stresses at the springline and the lateral earth pressure coefficient can be reliably estimated by considering them as functions of the horizontal deflection of the pipe.

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Section: Introductionmentioning

confidence: 99%

Effects of Pipe Deflection and Arching on Stress Distribution and Lateral Earth Pressure Coefficient in Buried Flexible Pipes

Gulen,

Kilic

2024

Applied Sciences

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“…The paper presented by Kılıç and Akınay (2019) focuses on an experimental study investigating the effects of using expanded polystyrene as compressible inclusion on buried high-density polyethylene (HDPE) pipe behavior. A series of full-scale tests was conducted using a laboratory testing facility to investigate the effects of using EPS on the behavior of a 300-mm nominal-diameter lined corrugated-wall HDPE pipe buried in a poorly graded sand medium.…”

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confidence: 99%