Analysis of fluidized zone in transparent soil under jet induced by pipe leakage

IF 3.7 Q1 WATER RESOURCES Water science and engineering Pub Date : 2023-06-01 DOI:10.1016/j.wse.2023.01.002

Li-jie Jiang , Bin Zhang , Sai-hua Huang , Yu Shao

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Abstract

Jets caused by burst tubes erode the surrounding soil, eventually leading to issues such as ground collapse. It is therefore highly important to study the mechanisms of soil erosion caused by jets after pipeline leakage. To investigate the water–soil interaction mechanisms of pipe leakage, this study used transparent soil and developed a three-dimensional experimental device to observe the fluidization process. Changes in the boundary of the fluidization transition area were investigated, and a formula for calculating the soil damage area was derived. The results showed three different shapes of the fluidized cavity appearing in the fluidization process. The particles initially moved upward and then gradually transitioned into a state of backflow. The effects of particle size, upper load, and porosity on fluidization were also analyzed. It was found that soil with a large particle size and a lower porosity under a heavy upper load can effectively restrain fluidization. Therefore, large-diameter and dense soil can be used as pipe-covering material.

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管道泄漏射流作用下透明土流化区分析

管道爆裂产生的射流会侵蚀周围的土壤，最终导致地面塌陷等问题。因此，研究管道泄漏后射流对土壤侵蚀的机理具有十分重要的意义。为了研究管道泄漏的水-土相互作用机理，本研究采用透明土，研制了三维实验装置，对流化过程进行了观察。研究了流化过渡区边界的变化规律，推导了土壤损伤面积的计算公式。结果表明，流化过程中出现了三种不同形状的流化腔。颗粒最初向上移动，然后逐渐过渡到回流状态。分析了粒径、上负荷和孔隙率对流态化的影响。研究发现，大粒径、低孔隙率的土在较大的上载荷作用下能有效抑制流态化。因此，大直径、致密的土壤可作为管道覆盖材料。

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来源期刊

Water science and engineering WATER RESOURCES-

CiteScore

6.60

自引率

5.00%

发文量

573

审稿时长

50 weeks

期刊介绍： Water Science and Engineering journal is an international, peer-reviewed research publication covering new concepts, theories, methods, and techniques related to water issues. The journal aims to publish research that helps advance the theoretical and practical understanding of water resources, aquatic environment, aquatic ecology, and water engineering, with emphases placed on the innovation and applicability of science and technology in large-scale hydropower project construction, large river and lake regulation, inter-basin water transfer, hydroelectric energy development, ecological restoration, the development of new materials, and sustainable utilization of water resources.