Mechanical response of buried polyethylene pipelines under excavation load during pavement construction

Liu, Xiaoben; Zhang, Hong; Xia, Mao; Wu, Kai; Chen, Yanfei; Zheng, Qian; Li, Jun

doi:10.1016/j.engfailanal.2018.03.027

Cited by 43 publications

(9 citation statements)

References 25 publications

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“…PE pipe, being a polymer, exhibits viscoelastic behavior, resulting in a high sensitivity of the stress-strain response to strain rate, leading to variations in yield stress values under different strain rates. 28 To precisely capture the stress change process of the material, models must incorporate the strain rate. Among the different available models, Suleiman's hyperbolic model, represented by Equation ( 4), offers a precise and reasonable approach to characterize the relationship between the mechanical properties of the PE pipe and strain rate.…”

Section: Meaning Valuementioning

confidence: 99%

“…[29][30][31][32][33] The limit state of a pipeline is a crucial index for assessing whether the pipeline can operate safely. 28,34 A plastic failure is the expected failure mode under rapid and large deformation scenarios such as rockfall impact, and it is reasonable to consider material failure when the yield strength of PE material is achieved. The buried PE pipeline system for gas use specifies the minimum required strength of pipe, but does not prescribe the pipe strain requirements.…”

Section: Pipeline Limit Statementioning

confidence: 99%

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Dynamic response and safety analysis of polyethylene pipeline under rockfall conditions

Yang

Liu

Peng

et al. 2023

Quality & Reliability Eng

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The safety of buried gas pipelines in mountainous cities is at risk due to potential hazards such as landslides and rock falls. To ensure the safety of pipelines, this paper develops a three‐dimensional dynamic response model to reveal the impact of rockfall radius, rockfall impact velocity, and pipe burial depth on the dynamic response of buried polyethylene pipelines (PE pipelines) under rockfall conditions. Subsequently, an orthogonal experimental design and analysis of variance (ANOVA) are performed to identify critical factors. Ultimately, a multi‐factor limit state equation is constructed to assess the safety of PE pipelines accordingly failure prevention actions for buried gas pipelines under the impact of rockfall is specified. Overall, this proposed method contributes to safety analysis of buried PE pipelines in rockfall‐prone areas.

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Section: Meaning Valuementioning

confidence: 99%

Section: Pipeline Limit Statementioning

confidence: 99%

Dynamic response and safety analysis of polyethylene pipeline under rockfall conditions

Yang

Liu

Peng

et al. 2023

Quality & Reliability Eng

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“…Xia et al 9 presented a theoretical method based on the Winkler model and the Timoshenko beam theory to calculate the effect of blasting loads induced by blasting the rock overlying a buried HDPE pipeline. Li et al 10 and Liu et al 11 analyzed the mechanical failure process of PE gas pipelines under the action of a third-party excavation load. Wang et al 12 used numerical modeling to investigate the bending moment in HDPE pipes that was caused by traffic loading, and proposed an empirical method to predict the maximum bending moment.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of shallow‐buried high‐density polyethylene pipeline under collapse touchdown impact

Tang

et al. 2021

Energy Science & Engineering

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“…e external disturbance is the primary cause of pipeline deformation and leakage [8]. In order to study the mechanical response of the pipeline under external disturbance, numerical simulations and experimental researches were conducted on the deformation and dynamic response of the steel pipe or PE pipeline under deflection loads, excavation loads, or other loads [9][10][11][12][13].Explosive loading poses a greater threat to the pipeline than other external loads. Zhang et al [14] simulated the buckling response of steel pipes in soil or rock formations subjected to ground explosive loading, the pipes in rock formation were more susceptible to damage, and the effects of explosive equivalent, explosion height, pipe diameter-thickness ratio, buried depth, and explosion location on the buckling response of the pipes were discussed.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Pipeline‐Pavement Damage Caused by Explosion of Leakage Gas in Buried PE Pipelines

Zhou

Zhenzhen

et al. 2020

Advances in Civil Engineering

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In order to investigate the damage influence of the leakage explosion in urban gas pipeline on the surrounding environment, the numerical models of buried PE (polyethylene) pipes under urban pavement were established by using ANSYS/LS-DYNA in this study. The reliability of the numerical models was verified on the basis of the explosion experiments. According to the amount of gas leakage, the TNT explosive equivalent was determined. The gas leakage explosion process of buried PE pipes was studied, and the pressure and stress changes of pipes and pavements under different explosive equivalents and buried depths were analyzed; at last, the deformation law of pipes and pavements were discussed. The results show that the PE pipes are fractured during the leakage explosion and a spherical explosion cavity is formed in the soil. The pavement above the explosion point bulges upward and forms a circle. The maximum pressure of pipe near the explosion point increases linearly with the increase of explosive equivalent, and a proportional relation is observed between the fracture width of pipe and the explosive equivalent. The degree and duration of pavement deformation increase significantly with the increase of explosive equivalents. The dynamic response of the pipes is rarely affected by the buried depth, and the change of maximum effective stress is no more than 7%. However, the buried depth is of great influence on the damage degree of pavement. When the buried depth increases from 0.9 m to 1.5 m, the pavement deformation can be reduced effectively. The variation rule of pavement deformation is similar to the change rule of maximum overpressure and effective plastic stress; they change in the form of concave functions with the increase of buried depth. The results can provide theoretical basis for municipal pipeline construction design and urban safety planning and provide references for the risk assessment of gas explosion in buried pipelines.

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Mechanical response of buried polyethylene pipelines under excavation load during pavement construction

Cited by 43 publications

References 25 publications

Dynamic response and safety analysis of polyethylene pipeline under rockfall conditions

Dynamic response and safety analysis of polyethylene pipeline under rockfall conditions

Experimental and numerical study of shallow‐buried high‐density polyethylene pipeline under collapse touchdown impact

Numerical Simulation of Pipeline‐Pavement Damage Caused by Explosion of Leakage Gas in Buried PE Pipelines

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