A New Stress Monitoring Method for Mechanical State of Buried Steel Pipelines under Geological Hazards

Li, Xinze; Wu, Qingbai; Jin, Huijun; Kan, Wei

doi:10.1155/2022/4498458

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…Features of the distribution of stresses and displacements in pipeline systems have been studied in many works [42][43][44][45], and the general approaches to such problems can be divided into three global directions. The first direction is based on analytical methods [46,47], and the research of the second direction is based on the finite element method.…”

Section: Introductionmentioning

confidence: 99%

Analytical Model of Interaction of an Oil Pipeline with a Support of an Overpass Built in a Mountainous Area

et al. 2023

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Today, pipelines are the safest and most economical way to transport petroleum products and one of the key components of modern energy infrastructure. Nevertheless, pipeline systems are associated with certain risks that can lead to environmental disasters. The idea of carrying out this study was initiated by the results of the survey of the overpasses of the long-used oil pipelines laid in the mountainous area of the Carpathian region. Defects such as a change in the shape of the pipe and local bulges in the area of oil pipeline support nodes were detected. The explanation of the described problem is separate from the typical algorithms of design calculations, which are offered to manufacturers by current directive documents. The desire to provide an explanation and quantitative assessment of the detected defects became the main motivation for writing the article. An analytical model of the interaction of the oil pipeline with the rigid support has been developed. Additional internal loads in the cross-section of the pipe and displacement of its middle surface, which arise as a result of such interaction, are determined. The method of determining the reaction in the intermediate support of the overpass of the oil pipeline has been developed, considering the properties of the soil base in the underground sections and the mounting gap in the support node. The analytical dependence was obtained to determine the additional hoop stresses that arise in the oil pipeline due to the contact of the pipe with the support. The unambiguous relationship between the maximum additional hoop stress and the reaction in the support node was established. The dependence of additional hoop stresses on the geometric characteristics of the pipes was analyzed. The obtained research results are tested on the real structure of the overpass of the Druzhba oil pipeline, built in the Carpathians. In general, a simple engineering technique has been developed that allows analyzing the behavior of the oil pipeline support node and provides the numerical correction to the traditional strength assessment formulas, which determine the equivalent stresses in the oil pipeline.

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Section: Introductionmentioning

confidence: 99%

Analytical Model of Interaction of an Oil Pipeline with a Support of an Overpass Built in a Mountainous Area

et al. 2023

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“…It should be noted that this technology suffers equipment stability problems over the course of a long lifespan. In addition, point-based measurement adopts strain gauge sensors to stick around the pipe wall for strain monitoring, and the additional stress was calculated based on the measured strain value [14]. It directly reflects the pipeline behavior when compared with long-distance pipeline monitoring.…”

Section: Introductionmentioning

confidence: 99%

A Data-Driven Based Method for Pipeline Additional Stress Prediction Subject to Landslide Geohazards

et al. 2022

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Pipelines that cross complex geological terrains are inevitably threatened by natural hazards, among which landslide attracts extensive attention when pipelines cross mountainous areas. The landslides are typically associated with ground movements that would induce additional stress on the pipeline. Such stress state of pipelines under landslide interference seriously damage structural integrity of the pipeline. Up to the date, limited research has been done on the combined landslide hazard and pipeline stress state analysis. In this paper, a multi-parameter integrated monitoring system was developed for the pipeline stress-strain state and landslide deformation monitoring. Also, data-driven models for the pipeline additional stress prediction was established. The developed predictive models include individual and ensemble-based machine learning approaches. The implementation procedure of the predictive models integrates the field data measured by the monitoring system, with k-fold cross validation used for the generalization performance evaluation. The obtained results indicate that the XGBoost model has the highest performance in the prediction of the additional stress. Besides, the significance of the input variables is determined through sensitivity analyses by using feature importance criteria. Thus, the integrated monitoring system together with the XGBoost prediction method is beneficial to modeling the additional stress in oil and gas pipelines, which will further contribute to pipeline geohazards monitoring management.

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A New Stress Monitoring Method for Mechanical State of Buried Steel Pipelines under Geological Hazards

Cited by 2 publications

References 27 publications

Analytical Model of Interaction of an Oil Pipeline with a Support of an Overpass Built in a Mountainous Area

Analytical Model of Interaction of an Oil Pipeline with a Support of an Overpass Built in a Mountainous Area

A Data-Driven Based Method for Pipeline Additional Stress Prediction Subject to Landslide Geohazards

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