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

Po Cheng, Jia Guo, Kai Yao, Chaofan Liu, Xiushui Liu and Fei Liu
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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
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

Sustainability, 2022, vol. 14, issue 13, 1-15

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.

Keywords: pipelines; finite element analysis; random field; failure mechanism; uplift capacity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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