A simplified method for predicting load–displacement curve with pipeline upward movement

The bending and damage suffered by the pipelines during the upward movement depend largely on the displacement of the pipe and the damage degree of the surrounding soil. According to the failure mechanism of the surrounding soil caused by the upward movement of pipelines, this paper described the sh...

Full description

Saved in:
Bibliographic Details
Published in:Canadian geotechnical journal 2025-01, Vol.62, p.1-13
Main Authors: Zeng, Hui, Lin, Xing-Tao, Chen, Xiangsheng
Format: Article
Language:English
Subjects:
Damage
Deformation
Exponential functions
Failure mechanisms
Movement
Parameter modification
Parameters
Pipelines
Process parameters
Shear planes
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The bending and damage suffered by the pipelines during the upward movement depend largely on the displacement of the pipe and the damage degree of the surrounding soil. According to the failure mechanism of the surrounding soil caused by the upward movement of pipelines, this paper described the shear plane development of the uplifting load–displacement curve (LDC) across varying phases. However, the existing LDC model is not able to accurately calculate the change in overlying load during pipeline upward. Hence, to precisely determine the uplifting load of the pipeline, a composite power-exponential function (CPEF) is proposed. Additionally, modifications have been made to the calculation formula for the residual uplifting load. The proposed CPEF comprises four parameters: a, b, c, and d. To verify the validity of the proposed CPEF model, the experimental results are compared with the calculated results of the proposed CPEF, which show that the proposed CPEF model can well predict the entire process of uplifting load changes on the pipeline during the upward movement process. Finally, the influence of parameters on the LDC calculated by CPEF under the same conditions was analyzed by varying the parameters of CPEF.
ISSN:0008-3674
1208-6010
DOI:10.1139/cgj-2024-0063