Pipe-Soil Interaction and Sensitivity Study of Large-Diameter Buried Steel Pipes

Wu, Haijun; Yu, Jinhong; Shi, Changzheng; Ma, Zhu

doi:10.1007/s12205-021-0392-3

Cited by 14 publications

(3 citation statements)

References 20 publications

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“…Determining the mechanism of the pipe-soil interaction is the key to obtaining the stress state of the buried pipeline crossing the fault. The pipe-soil interaction changes gradually with the increase of the fault displacement (δ) [32][33][34][35] . Take the normal fault as an example, whose hanging wall moves downward relative to the foot wall.…”

Section: Pipe-soil Interaction Mechanismmentioning

confidence: 99%

Research on the interaction between trench material and pipeline under fault displacement

Yang,

Wang,

Jia

et al. 2024

Sci Rep

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With the large-scale construction of oil and gas pipelines, the safety issues of long-distance buried pipelines in the service and construction have become increasingly prominent. The complex geological and topographical conditions of the special zone will put forwards extremely high requirements on pipe trench laying backfill materials and construction technology. For example, pipelines are inevitable to cross the active fault, while the trench backfilled with soil has limitations in protecting them from failure under the active fault displacement caused by the earthquake. Therefore, it is necessary to study the pipe–soil interaction mechanism, determine the stress state of the pipeline and propose a new backfilling material that can protect the pipeline from failure. Foam concrete (FC) provides a new choice to backfill the buried pipeline trench due to its high-homogeneity, lightweight, controllable-strength, and self-compacting. To further determine the applicability of the FC, the pipe-FC interaction mechanism is studied. Then, a FE model of the FC-pipeline-soil interaction system is established by Abaqus to quantitatively analyze the applicability of the FC based on the experimental data of the mechanical performance of the FC. It proves that using FC as trench backfill material has a noticeable protective effect on the pipeline under the earthquake-induced displacement of the normal fault. Furthermore, FC has a better protective effect on the pipeline subjected to compressive than tensile. Therefore, the reference for applying FC in trench backfilling of pipelines crossing normal fault is provided.

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Section: Pipe-soil Interaction Mechanismmentioning

confidence: 99%

Research on the interaction between trench material and pipeline under fault displacement

Yang,

Wang,

Jia

et al. 2024

Sci Rep

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“…Macaro, Utili, and Martin [25] utilized the three-dimensional distinct-element method to investigate the behavior of a partially embedded pipe segment in sand, and the simulation approach was validated against experimental results. Wu [26] presented a detailed numerical investigation to study the interaction between large-diameter pipes and soil under three typical working conditions. The study aimed to capture the structural mechanical behaviors associated with pipe deformation, soil displacement, and soil pressure.…”

Section: Introductionmentioning

confidence: 99%

A Method for Predicting the Load Interaction between Reinforced Thermoplastic Pipe and Sandy Soil Based on Model Testing

Wang,

Liu,

Zhang

et al. 2023

JMSE

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This study aims to investigate the interaction between reinforced thermoplastic pipes (RTPs) and sandy soil. The mechanical properties of sandy soil in the South China Sea region were determined through shear tests to obtain fundamental data. Subsequently, a specialized experimental setup was designed and assembled to study the pipe–soil interaction, specifically measuring the lateral soil resistance of flexible pipes at varying burial depths. Data analysis revealed the relationship between soil resistance, lateral displacement, and initial burial depth. To simulate the mechanical behavior of the pipe–soil interaction, the coupled Eulerian–Lagrangian (CEL) method was employed for numerical simulations. The research findings indicate that the lateral soil resistance is influenced by the uplift height and accumulation width of the soil ahead of the pipe. Within a lateral displacement range of 0.5 times the pipe diameter (0.5D), the lateral soil resistance rapidly increases, resulting in a soil uplift along the circumferential direction of the pipe. This process not only enhances the load-bearing capacity of the pipe but also increases the accumulated soil resistance, consequently expanding the soil failure zone. Furthermore, the ultimate soil resistance exhibits an increasing trend with an increasing burial depth. Once the pipe reaches a certain burial depth, the uplift height of the soil reaches a critical state. To address the grid distortion caused by soil deformation, numerical simulations based on the CEL method effectively modeled the pipe–soil interaction forces under significant lateral displacements, exhibiting good agreement with the experimental results. This study provides a solution for investigating soil resistance in submarine pipelines, thereby contributing significantly to the design and performance prediction of underwater pipelines.

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“…Buried gas pipelines are subjected to severe stresses during loading due to soil-structure interaction, the presence of traffic loads, the self-weight of the soil, daily or seasonal temperature variations, and uniform internal pressures [8]. Wu et al use the orthogonal test method for sensitivity analysis of soil parameters and a comprehensive numerical study of the interaction between large diameter pipes and soils [9]. Wang et al conduct a study of surface stress tests between room temperature or frozen sand and pipes to investigate the facial stress experienced by pipes buried in sand [10].…”

Section: Introductionmentioning

confidence: 99%

Coupling Interaction of Surrounding Soil-Buried Pipeline and Additional Stress in Subsidence Soil

Ding

Yang

et al. 2021

Geofluids

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In the process of underground resource exploitation, the induced surface subsidence easily leads to the deformation and failure of buried pipeline. And in the process of soil subsidence, the complex interaction between buried pipeline and surrounding soil occurs, which leads to deformation and additional stress in buried pipeline. In this paper, a laboratory test system is designed and developed to analyze the influence of buried depth, cohesion of soil, and angle of internal friction on stress, in order to obtain the deformation mechanism of pipe-soil and the pressure around the pipe and the distribution of additional axial stress along the pipeline. The research results show that in the process of subsidence, the synergistic deformation between the pipe and soil at both ends of the subsidence area is maintained, while there is a compressive nonsynergistic deformation zone in the soil at the top of the pipe, and the deformation zone in the cohesion-less soil and the cohesive soil presents a spire shape and an arch shape, respectively. Areas of maximum additional tensile and compressive stresses occur in the area of maximum curvature and the central position. In addition, the smaller the burial depth, the earlier the unloading phenomenon occurs; and the additional stress in buried pipe in cohesion-less soil is significantly less than that in cohesive soil, and the unloading phenomenon occurs earlier. The research results provide the basis for disaster prevention of buried petroleum transmission pipeline in subsidence process.

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Pipe-Soil Interaction and Sensitivity Study of Large-Diameter Buried Steel Pipes

Cited by 14 publications

References 20 publications

Research on the interaction between trench material and pipeline under fault displacement

Research on the interaction between trench material and pipeline under fault displacement

A Method for Predicting the Load Interaction between Reinforced Thermoplastic Pipe and Sandy Soil Based on Model Testing

Coupling Interaction of Surrounding Soil-Buried Pipeline and Additional Stress in Subsidence Soil

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