长江中游护滩工程边缘防冲促淤水草垫结构试验
发布时间：2019-05-12 08:44
【摘要】：通过分析航道整治护滩工程边缘防冲促淤结构不足,提出水草垫结构,并开展定床和动床模型试验,研究不同倒伏程度、不同布置形式、不同水动力条件下水草垫的防冲促淤效果。结果表明:当流速较小时叶片弯曲幅度较小;流速增加至0.3 m/s时,叶片弯曲幅度较大;流速增至0.73 m/s时,叶片弯幅度增加较小。叶片倒伏60°情况,水草垫稀疏布置,防护效果较好;倒伏75°情况,水草垫密集布置,其防护效果较好。当来流速度较大时,水草垫区域内有较大淤积幅度,但淤积范围明显缩窄,侧缘坡度较陡,防护效果并不理想。在此基础上,确定了水草垫结构。
[Abstract]:Based on the analysis of the deficiency of scour and siltation structure at the edge of waterway regulation and beach protection project, the structure of water and grass cushion is put forward, and the model tests of fixed bed and moving bed are carried out to study the different lodging degree and different arrangement forms. Anti-scouring and silting effect of water grass pad under different hydrodynamic conditions. The results show that the bending amplitude of the blade is smaller when the velocity is small, the bending amplitude of the blade is larger when the velocity increases to 0.3 m 鈮，
本文编号：2475256
[Abstract]:Based on the analysis of the deficiency of scour and siltation structure at the edge of waterway regulation and beach protection project, the structure of water and grass cushion is put forward, and the model tests of fixed bed and moving bed are carried out to study the different lodging degree and different arrangement forms. Anti-scouring and silting effect of water grass pad under different hydrodynamic conditions. The results show that the bending amplitude of the blade is smaller when the velocity is small, the bending amplitude of the blade is larger when the velocity increases to 0.3 m 鈮，
本文编号：2475256
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