Limit width analysis of X80 corroded pipeline pass through landslide

Peng ZHANG; Xuemei TANG; Hu LI; Siming LIU

doi:10.16031/j.cnki.issn.1003-8035.202108020

Volume 33 Issue 4

Aug. 2022

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The Chinese Journal of Geological Hazard and Control > 2022 > 33(4): 47-54. > DOI: 10.16031/j.cnki.issn.1003-8035.202108020

ZHANG Peng, TANG Xuemei, LI Hu, et al. Limit width analysis of X80 corroded pipeline pass through landslide[J]. The Chinese Journal of Geological Hazard and Control, 2022, 33(4): 47-54. DOI: 10.16031/j.cnki.issn.1003-8035.202108020

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Limit width analysis of X80 corroded pipeline pass through landslide

1.
School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu, Sichuan　610500, China
2.
Sichuan Geological Engineering Survey Research Institute Group Co. Ltd., Chengdu, Sichuan　610500, China
3.
School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan　610500, China

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Received Date: August 20, 2021
Revised Date: October 24, 2021
Accepted Date: December 09, 2021
Available Online: May 16, 2022

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Abstract

Abstract

In view of the safety early warning problems involved in X80 corroded pipeline crossing landslide, it is proposed to take the limit width as the discrimination factor of pipeline safety state, establish a finite element model according to the specific landslide conditions, to analyze the influence of different corrosion sizes and spatial positions of pipeline on the mechanical behavior and limit width of corroded pipeline. The results show that the limit width can be used to evaluate the safety state of pipeline. The width and depth of corrosion are negatively correlated with the ultimate width of pipeline, and show high sensitivity to corrosion depth; the influence of internal corrosion on pipeline safety is greater than that of external corrosion; under the soil landslide with a slope of 30°, the critical cross landslide width of the non-corrosive X80 pipeline with an outer diameter of 10.16 cm is 21.2 m, and the critical corrosion depth of the corrosive pipeline crossing the landslide is 0.25 times the wall thickness; when the distance between the corroded pipeline and the middle of the landslide area is greater than 6 m, the influence on the limit width of the pipeline can be ignored; the pipeline stress is negatively correlated with the limit width. When the corrosion depth is 0.2 times the wall thickness, the maximum stress of the pipeline is always at the corrosion position, and the stress at other positions is consistent with that of the non-corrosive pipeline.
- X80 pipeline,
- landslide,
- corrosion size,
- corrosion space location,
- limit width

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Limit width analysis of X80 corroded pipeline pass through landslide

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