Numerical analysis of geological settlement failure of buried PE gas pipeline

doi:10.16265/j.cnki.issn1003-3033.2019.10.004

Abstract

Abstract: In order to study failure process of buried PE gas pipeline in the process of geological settlement, the stress-strain corresponding relationship of PE pipe was obtained by mechanical tensile experiment firstly. An improved Sherwood equation was fitted and the failure prediction model of PE pipes on the basis of strain rate was obtained. Then the mechanical response of PE pipelines in different settlement stages and with different slopes was simulated by ABAQUS software. The results show that the fourth-order Sherwood constitutive model can express and predict the mechanical response of PE pipes, and that the displacement and the depth of soil settlement have a direct impact on the distribution of stress and strain and the ellipticity of pipes.

Key words: polyethylene(PE)gas pipeline, geological subsidence, finite element analysis, mechanical response, prediction model

CLC Number:

X937

YIN Ying, LAN Chaoxun, LI Jun, MAO Dan, SHI Junlin. Numerical analysis of geological settlement failure of buried PE gas pipeline[J]. China Safety Science Journal, 2019, 29(10): 18-23.

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