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Numerical Simulation of Strength Failure of Buried Polyethylene Water Supply Pipe Under Subsoil Settlement

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Abstract

Subsoil settlement often influences the safety and normal performance of buried pipelines. Based on the buried situation of the underground polyethylene (PE) water supply pipe in Taiyuan City, according to the laboratory model box experiment, a numerical simulation was conducted in ABAQUS, for the buried PE water supply pipe, under the action of subsoil settlement in this paper. The subsoil settlement was simulated by deactivating soil elements gradually, and the process curves of stress and settlement displacement of the pipeline with subsoil settlement were obtained. The correctness and feasibility of the simulation were verified by comparing it with laboratory test data. According to the finite element calculation results, the strength failure process of the pipeline was analyzed, thereby the main control stress and dangerous sections of the pipeline were determined. Finally, the effects of the wall thickness of the pipeline, buried depth of the pipeline, internal pressure of the pipeline, elastic modulus of soil, Poisson's ratio of soil, and friction coefficient between the pipeline and soil on the stress and settlement displacement of the pipeline were discussed. The research results could provide a reference for the safety protection of buried PE water supply pipe under the conditions of subsoil settlement.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (41807256), Key Laboratory of Ministry of Education of Geotechnical and Underground Engineering, Tongji University (KLE-TJGE-B1701), State Key Laboratory of Rock and Soil Mechanics and Engineering (Z017003), and National Laboratory of Ministry of Education for Geotechnical mechanics and dam engineering, Hohai University (201702).

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  1. College of Civil Engineering, Taiyuan University of Technology, West Yingze Street 79, Taiyuan, 030024, People’s Republic of China

    Honglin Chang, Yujie Lan, Bin He, Pengju Han & Xiaohong Bai

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  1. Honglin Chang
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  2. Yujie Lan
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  3. Bin He
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  4. Pengju Han
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  5. Xiaohong Bai
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Correspondence to Bin He.

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Chang, H., Lan, Y., He, B. et al. Numerical Simulation of Strength Failure of Buried Polyethylene Water Supply Pipe Under Subsoil Settlement. J Fail. Anal. and Preven. 21, 1838–1854 (2021). https://doi.org/10.1007/s11668-021-01240-5

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  • DOI: https://doi.org/10.1007/s11668-021-01240-5

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