Advances in the Study of Hydraulic Characteristics of Tetrahedral Permeable Frames

QIU Ming-song; DING Bing; MIN Feng-yang; CAO Min-yi; WANG Ji-bao

doi:10.11988/ckyyb.20250804

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Journal of Changjiang River Scientific Research Institute ›› 0 DOI: 10.11988/ckyyb.20250804

Advances in the Study of Hydraulic Characteristics of Tetrahedral Permeable Frames

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Abstract

Riverbank protection is a crucial measure for maintaining the stability of river slopes. Due to their excellent flow-disturbing and velocity-reducing characteristics, sediment-promoting and bank-protecting functions, as well as ecological benefits, tetrahedral permeable frames have attracted significant attention from researchers. This paper reviews existing research achievements regarding the hydraulic characteristics of tetrahedral permeable frames. By examining their structural features and integrating experimental and observational data, the mechanisms behind flow reduction and sediment promotion are analyzed. The influence of parameters such as void ratio and the length-to-width ratio of frame members on flow velocity, turbulence intensity, and Reynolds stress is systematically summarized. Studies indicate that tetrahedral permeable frames can reduce flow velocity by 30% to 70%, effectively disturbing flow, decelerating currents, promoting sedimentation, and protecting banks. The optimal performance is achieved when the void ratio ranges between 4.5 and 5.0 and the length-to-width ratio of the members is approximately 16. Furthermore, arranging the frames with the "pointed end facing the flow" yields better flow reduction effects compared to the "blunt end facing the flow" configuration. Based on these findings, current limitations in research are discussed, and future research directions are proposed, aiming to provide theoretical foundations and practical references for related river regulation projects.

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tetrahedral permeable frame / hydraulic characteristics / flow retardation / sediment deposition and bank protection

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QIU Ming-song , DING Bing , MIN Feng-yang , et al . Advances in the Study of Hydraulic Characteristics of Tetrahedral Permeable Frames[J]. Journal of Changjiang River Scientific Research Institute. 0 https://doi.org/10.11988/ckyyb.20250804

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