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Uplift Behavior of Pipelines Buried at Various Depths in Spatially Varying Clayey Seabed

Author

Listed:
  • Po Cheng

    (State Key Laboratory of Water Resources and Hydropower Engineering Science, Institute of Engineering Risk and Disaster Prevention, Wuhan University, 299 Bayi Road, Wuhan 430072, China)

  • Jia Guo

    (Department of Civil Engineering and Mechanics, Faculty of Engineering, China University of Geoscience (Wuhan), Wuhan 430074, China)

  • Kai Yao

    (School of Qilu Transportation, Shandong University, 12550 East Second Ring Road, Jinan 250002, China
    Shenzhen Research Institute, Shandong University, A301 Virtual University Park, South District of Shenzhen, Shenzhen 518057, China)

  • Chaofan Liu

    (Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, China No. 1239 Siping Road, Shanghai 200092, China)

  • Xiushui Liu

    (Hebei Haoyu Engineering Technology Consulting Co., Ltd., No. 238 Jin Zhong He Street, Tianjin 300250, China)

  • Fei Liu

    (School of Civil Engineering, Chongqing University, No. 83 Shabei Street, Chongqing 400045, China)

Abstract

The behavior of buried offshore pipelines subjected to upheaval buckling has attracted much attention in recent years. Numerous researchers have made great efforts to investigate the influence of different soil cover depth ratios, soil strengths and pipe-soil interfaces on failure mechanisms and bearing capacities during pipeline uplift. However, attention to soil spatial variability has been relatively limited. To address this gap, a random small-strain finite element analysis has been conducted and reported in this paper to evaluate the influence of the random distribution of soil strength on pipe uplift response. The validity of the numerical model was verified by comparison with the results presented in the previous literature. The spatial variation of soil strength was simulated by a random field. The effect of soil variability on the failure mechanism was determined by comparing the displacement contours of each random realization. Probabilistic analyses were performed on the random uplift capacity obtained by a series of Monte Carlo simulations, and the relationship between the failure probability and the safety factor was also determined. The findings of the present work might serve as a reference for the safety designs of pipelines.

Suggested Citation

  • Po Cheng & Jia Guo & Kai Yao & Chaofan Liu & Xiushui Liu & Fei Liu, 2022. "Uplift Behavior of Pipelines Buried at Various Depths in Spatially Varying Clayey Seabed," Sustainability, MDPI, vol. 14(13), pages 1-15, July.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:13:p:8139-:d:855185
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    Cited by:

    1. Jin Yu & Chao Chen & Changjun Li, 2022. "Safety Analysis and Emergency Response of Suspended Oil and Gas Pipelines Triggered by Natural Disasters," Sustainability, MDPI, vol. 14(24), pages 1-15, December.

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