Abstract: Dredging and chamfering are important measures for waterway regulation． Different forms of chamfering section have different characteristics of water-sediment movement，which can influence the chamfering stability． Through generalized model test and theoretical analysis，the influence on sedimental bed load movement，the chamfering plane layout and the chamfering stability caused by chamfering flow characteristics and different chamfering sections were studied． The results show that narrow deep type section is better for stability of dredging and chamering; BOD B/H should be between 17.8 ～ 21.5 while flow speed( 1.1 ～ 1.3) Vc ．

Key words: waterway regulation, chamfering, stability

摘要： 疏浚挖槽是航道整治的重要措施。不同的挖槽断面形式，有不同的水沙运动特性，常常影响到新开挖槽的稳 定性。以概化模型试验为手段，结合理论分析，就挖槽水流特性、不同挖槽断面型式对泥沙推移质运动的影响、挖槽 平面布置、挖槽稳定性要求进行研究。研究成果表明:疏浚挖槽采用窄深型断面的稳定性较好，宽深比B/H一般在 17．8～21．5之间，挖槽内流速一般要求为(1．1～1．3)Vc。

关键词: 航道整治, 挖槽, 稳定性