The effect of the backfill on the integrity of a buried pipeline upon heavy-duty vehicle crossings

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F23%3A00572273" target="_blank" >RIV/68378297:_____/23:00572273 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1088/1742-6596/2568/1/012002" target="_blank" >https://doi.org/10.1088/1742-6596/2568/1/012002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/2568/1/012002" target="_blank" >10.1088/1742-6596/2568/1/012002</a>

Result language

angličtina

Original language name

The effect of the backfill on the integrity of a buried pipeline upon heavy-duty vehicle crossings

Original language description

The aim of this work was to determine stresses in the wall of a buried empty gas pipeline caused by the weight of backfill as well as by heavy-duty vehicles crossing the pipeline, and, on their basis to assess the applicability of protective sleeves. A buried pipeline with zero internal pressure of transported medium (empty pipeline) differs from an unburied pipeline by the vertical load due to the weight of the backfill which causes an ovalness of the circular cross section of the pipeline. This leads to the rise of through-wall bending stresses with the tensile stress at the outside surface at the 3 and 9 o´clock positions and compressive stress at the inside surface. At the 6 and 12 o´clock positions the stresses are tensile at the inside surface and compressive at the outside surface. The current depth of soil cover above gas pipelines is 0.5 m. For pipes DN500, t ~ 6.5 mm the through-wall bending stress is found to be σb ≈ ±10 MPa. In comparison with the yield stress of pipeline material, this stress is negligible. The situation is changed when heavy-duty vehicles cross the pipeline. For example, when a MAN truck with the mass load 3270 kg acting on a single wheel of the front axle crosses this pipeline, the pressure transmitted to the pipe will cause the through-wall bending stress σb ≈ ±76 MPa. This stress is superimposed to that of the backfill to give the total value ±86 MPa. When dead loads, imposed by backfill cover, together with live loads, caused by truck-wheel loads, are excessive a crushing of side walls of the pipeline and/or ring buckling of the pipe cross section can happen.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20302 - Applied mechanics

Project

<a href="/en/project/FW01010021" target="_blank" >FW01010021: Means for ballistic protection enhancement of vehicles and critical infrastructure</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Journal of Physics: Conference Series

ISBN

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ISSN

1742-6588

e-ISSN

1742-6596

Number of pages

8

Pages from-to

012002

Publisher name

IOP Publishing

Place of publication

Bristol

Event location

Telč

Event date

May 23, 2023

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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