Effects of backfill soil on pipeline’s mechanical response subjected to perilous rock impact

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY

Engineering Review Pub Date : 2020-01-27 DOI:10.30765/er.40.1.04

Jie Zhang, Wei Guo, Hai-yan Li

引用次数: 1

Abstract

Perilous rock impact is one of the most serious geological disasters that threats to buried pipeline security. Mechanical behavior of buried pipeline in rock stratum impacted by perilous rock was simulated in this paper. And effects of impact velocity and backfill soil parameters on stress and strain of pipeline were discussed. The resluts show that cross section shape of pipeline is oval when impact velocity is small. Impact dent appears on pipeline with the increasing of impact velocity, buckling is more serious and plastic stain increases. Under low velocity impact, stress and plastic strain decrease with the increasing of soil's elastic modulus. Plastic strain increases first and then decreases with the increasing of soil's Poisson's ratio. With the increasing of soil's cohesion, plastic strain increases, but stress first increases and then decreases. Under high velocity impact, deformation and plastic strain increase with the decreasing of elastic modulus and Poisson's ratio. But cohesion has a small effect on buckling behavior of pipeline.

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危险岩石冲击下回填土对管道力学响应的影响

危岩冲击是威胁埋地管道安全的最严重地质灾害之一。本文模拟了受危岩冲击的地层中埋地管线的力学行为。讨论了冲击速度和回填土参数对管道应力应变的影响。结果表明:当冲击速度较小时，管道截面形状为椭圆形;随着冲击速度的增加，管道出现冲击凹痕，屈曲更严重，塑性污渍增加。低速冲击下，应力和塑性应变随土体弹性模量的增大而减小。塑性应变随泊松比的增大先增大后减小。随着土体黏聚力的增大，塑性应变增大，但应力先增大后减小。在高速冲击下，变形和塑性应变随弹性模量和泊松比的减小而增大。但粘聚力对管道屈曲行为的影响较小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Review ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

0.00%

发文量

期刊介绍： Engineering Review is an international journal designed to foster the exchange of ideas and transfer of knowledge between scientists and engineers involved in various engineering sciences that deal with investigations related to design, materials, technology, maintenance and manufacturing processes. It is not limited to the specific details of science and engineering but is instead devoted to a very wide range of subfields in the engineering sciences. It provides an appropriate resort for publishing the papers covering prior applications – based on the research topics comprising the entire engineering spectrum. Topics of particular interest thus include: mechanical engineering, naval architecture and marine engineering, fundamental engineering sciences, electrical engineering, computer sciences and civil engineering. Manuscripts addressing other issues may also be considered if they relate to engineering oriented subjects. The contributions, which may be analytical, numerical or experimental, should be of significance to the progress of mentioned topics. Papers that are merely illustrations of established principles or procedures generally will not be accepted. Occasionally, the magazine is ready to publish high-quality-selected papers from the conference after being renovated, expanded and written in accordance with the rules of the magazine. The high standard of excellence for any of published papers will be ensured by peer-review procedure. The journal takes into consideration only original scientific papers.