Damage analysis of urban gas PE pipeline under excavation load

doi:10.16265/j.cnki.issn1003-3033.2017.03.011

Abstract

Abstract: In order to analyze the damage caused by third-party excavating construction to the PE pipeline, the dynamic response of the gas PE pipeline under excavation load was studied by using the ABAQUS finite element software. First,models were built respectively for the pipe, soil and pipe-soil contact, and the model for pipeline was simulated by Prony series. Then, strength, strain and deformation failure criteria of PE pipeline were established. Finally, the numerical simulation was carried out for two scenarios: the excavation load directly acting and not directly acting on the pipe. The simulation results show that PE pipeline is easiest to reach the strength failure limit under the excavation load,that the load acting directly on the pipeline causes remarkable stress concentration, and load which is not directly acting on the pipeline mainly affects the deformation of the pipeline, and that an external load directly acting on the pipeline is a major threat to its safe operation,and the covering soil layer can reduce the threat.

Key words: gas polyethylene(PE) pipeline, excavation load, dynamic response, failure criteria, numerical simulation

CLC Number:

X937

ZHOU Liguo, YAO Anlin, XU Taolong, ZHOU Xue, SHANG Mao. Damage analysis of urban gas PE pipeline under excavation load[J]. China Safety Science Journal, 2017, 27(3): 59-64.

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