Interaction of Buried Pipeline with Soil Under Different Loading Cases

Magura, Martin

doi:10.1515/sjce-2016-0014

Cited by 3 publications

(3 citation statements)

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“…Reakcja podziemnych rur elastycznych, w tym PEHD, na działanie obciążeń była wielokrotnie analizowana analityczne, laboratoryjnie a także numerycznie, np. [5][6][7][8]. Głównym celem tych analiz było lepsze poznanie mechanizmu działania układu rura-grunt oraz doprecyzowanie metod wyznaczania ugięć rur.…”

Section: Streszczenieunclassified

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Analysis of the effects of using various backfill materials in the buried pipelines construction

2023

Archives of Civil Engineering

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In the article the effects of backfilling an underground, flexible pipeline, using natural materials (ground backfill) and modified materials, so called Lightweight Backfilling Materials (LBMs) were analyzed. These materials, thanks their lower density, have a positive effect on reducing the loads on the underground pipeline and, consequently, reducing deformations and stresses in its wall. LBMs include lightweight expanded clay aggregates, recycled tire chips used directly in the trench or mixed with the soil, foam concrete, foam glass (granules or plates), and expanded polystyrene, embedded in the ground in the form of blocks. The assessment of the effects of modifying the backfill of the underground pipeline was carried out by means of multi-variant numerical analysis in which models of the pipe-soil system in a plane strain state (2D model) were tested. In these models PEHD pipes were represented, with differential of their diameter (DN315, DN600) and stiffness (SDR), as well as trenches of various shapes (trench with vertical walls and with sloping walls). In the numerical calculations, two variants of trench filling were analyzed: full filling with soil and filling with selected LBMs (expanded clay aggregates, expanded polystyrene, tire chips mixed with soil) in layers separated in the backfill. The results of numerical calculations for particular variants of the models were analyzed in terms of the distribution of vertical displacements and stresses in the soil and pipe deformation. The received pipe deflections and circumferential stresses in their wall were related to the permissible values for PEHD pipes.

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Section: Streszczenieunclassified

“…The reaction of buried flexible pipes, including PEHD, to loads has been repeatedly analyzed analytically, laboratory and numerically (e.g. [5][6][7][8]). The main objective of these activities was to better understand the mechanism of operation of the pipe-soil system and to clarify the methods of determining pipe deflections.…”

Section: Introductionmentioning

confidence: 99%