Calculation model for strain of buried pipeline under the action of continuous surface displacement

The long-distance oil & gas pipelines run through areas with various complicated geological conditions and often face the threats of geological hazards. In terms of the discrete characteristics of the surface displacement monitoring data in existing pipeline sections threated by geological disas...

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Bibliographic Details
Published inYou-qi chuyun Vol. 40; no. 7; pp. 809 - 815
Main Authors Ning GAO, Hong ZHANG, Gaoling LIU, Pengchao CHEN, Ning SHI, Xiaoben LIU
Format Journal Article
LanguageChinese
Published Editorial Office of Oil & Gas Storage and Transportation 01.07.2021
Subjects
design strain
geological hazards
interpolation
oil and gas pipeline
pipe-soil interaction
surface displacement
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Summary:The long-distance oil & gas pipelines run through areas with various complicated geological conditions and often face the threats of geological hazards. In terms of the discrete characteristics of the surface displacement monitoring data in existing pipeline sections threated by geological disaster, a three-dimensional reconstruction method of surface displacement based on cubic spline interpolation (CSI) was proposed to realize the continuous representation of surface displacement. Then, the pipe-soil interaction was described using the nonlinear soil spring element with the nonlinear finite element method, the pipes were described with the Ramberg-Osgood constitutive model, and the parametric calculation model for strain of buried pipeline under the action of continuous surface displacement was established with the INP parametric programming language. The new model takes the influence of the working load (such as temperature and pressure) and the actual route of the pipeline on the initial stress of the pip
ISSN:1000-8241
DOI:10.6047/j.issn.1000-8241.2021.07.013