Study on Stress-Strain Characteristics of Pipeline-Soil Interaction under Ground Collapse Condition

Liu, Xiaohui; Sun, Zhizhong; Zhu, Jun; Fang, Yuda; He, Yanglian; Pan, Yuchen

doi:10.1155/2022/5778761

Cited by 3 publications

(4 citation statements)

References 28 publications

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“…(4) Increasing the amount of training data or introducing some changes through some data enhancement techniques can help improve the generalization ability of the model. (5) Carefully select features relevant to the task and avoid using too many irrelevant features. When establishing and adjusting the PSO-LSTM model, this article comprehensively considers the above factors to help the model reduce the risk of overfitting and improve its robustness and generalization ability.…”

Section: Discussion On the Risk Of Overfitting The Pso-lstm Predictio...mentioning

confidence: 99%

“…In 2020, Wu carried out mechanical analysis work on buried polyethylene pipelines, and the results showed that the ground settlement rate has little effect on the ultimate bearing capacity of buried pipelines [4]. In 2022, Xiaohui studied the relationship between soil parameters, pipeline parameters, and settlement displacement under the action of foundation collapse and found that the mid-span pipeline had tensile stress and shear stress on both sides of the collapse zone [5]. In 2023, Pengchao established a stress prediction model for buried pipelines in melt settlement areas based on the support vector regression algorithm and gave working condition parameters to enhance the resistance of buried pipelines to deformation [6].…”

Section: Introductionmentioning

confidence: 99%

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Buried Pipeline Collapse Dynamic Evolution Processes and Their Settlement Prediction Based on PSO-LSTM

Zhou,

Teng,

Chi

et al. 2023

Applied Sciences

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Based on the unit life and death technology, the dynamic evolution process of soil loss is considered, and a pipe-soil nonlinear coupling model of buried pipelines passing through the collapse area is constructed. The analysis shows that after the third layer of soil is lost, the existence of the “pipe-soil separation” phenomenon can be confirmed, which then supplements the assumption that “pipe-soil is always in contact” in the elastic foundation beam theory. Calculation of settlement deformation of buried pipelines It needs to be divided into two stages: cooperative deformation and non-cooperative deformation. Taking the settlement prediction of buried pipelines as the goal, the particle swarm algorithm (PSO) was used to optimize the number of neurons, Dropout, and Batch-size in the long short-term memory network (LSTM) structure. The optimization results were 60, 0.001, and 100, respectively. The PSO-LSTM model proposed in this article can accurately describe the dynamic evolution process of buried pipelines and has better prediction accuracy than the modified Gaussian curve method and LSTM neural network model. The use of this model can provide a reference for safety risk management, disaster early warning, and intelligent monitoring when buried pipelines suffer from soil collapse disasters.

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Section: Discussion On the Risk Of Overfitting The Pso-lstm Predictio...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Buried Pipeline Collapse Dynamic Evolution Processes and Their Settlement Prediction Based on PSO-LSTM

Zhou,

Teng,

Chi

et al. 2023

Applied Sciences

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“…Because of the greater deformation stiffness of the pipeline, its deformation will be smaller than that of the soil as the δ increases, and the soil counterforce below the pipeline will gradually decrease. When the soil counterforce reduces to 0, the pipeline will be out of contact with the soil [36][37][38] . With the δ further increase, there will be a suspended area below the pipeline.…”

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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“…The first direction is based on analytical methods [46,47], and the research of the second direction is based on the finite element method. I uses application packages of engineering programs [48,49], and the third direction uses devices for laboratory and natural measurements or model experiments [50,51]. Our ar ticle develops the first, analytical direction of research.…”

Section: Modeling the Interaction Of The Oil Pipeline With The Rigid ...mentioning

confidence: 99%

Analytical Model of Interaction of an Oil Pipeline with a Support of an Overpass Built in a Mountainous Area

et al. 2023

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Today, pipelines are the safest and most economical way to transport petroleum products and one of the key components of modern energy infrastructure. Nevertheless, pipeline systems are associated with certain risks that can lead to environmental disasters. The idea of carrying out this study was initiated by the results of the survey of the overpasses of the long-used oil pipelines laid in the mountainous area of the Carpathian region. Defects such as a change in the shape of the pipe and local bulges in the area of oil pipeline support nodes were detected. The explanation of the described problem is separate from the typical algorithms of design calculations, which are offered to manufacturers by current directive documents. The desire to provide an explanation and quantitative assessment of the detected defects became the main motivation for writing the article. An analytical model of the interaction of the oil pipeline with the rigid support has been developed. Additional internal loads in the cross-section of the pipe and displacement of its middle surface, which arise as a result of such interaction, are determined. The method of determining the reaction in the intermediate support of the overpass of the oil pipeline has been developed, considering the properties of the soil base in the underground sections and the mounting gap in the support node. The analytical dependence was obtained to determine the additional hoop stresses that arise in the oil pipeline due to the contact of the pipe with the support. The unambiguous relationship between the maximum additional hoop stress and the reaction in the support node was established. The dependence of additional hoop stresses on the geometric characteristics of the pipes was analyzed. The obtained research results are tested on the real structure of the overpass of the Druzhba oil pipeline, built in the Carpathians. In general, a simple engineering technique has been developed that allows analyzing the behavior of the oil pipeline support node and provides the numerical correction to the traditional strength assessment formulas, which determine the equivalent stresses in the oil pipeline.

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Study on Stress-Strain Characteristics of Pipeline-Soil Interaction under Ground Collapse Condition

Cited by 3 publications

References 28 publications

Buried Pipeline Collapse Dynamic Evolution Processes and Their Settlement Prediction Based on PSO-LSTM

Buried Pipeline Collapse Dynamic Evolution Processes and Their Settlement Prediction Based on PSO-LSTM

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

Analytical Model of Interaction of an Oil Pipeline with a Support of an Overpass Built in a Mountainous Area

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