波浪作用下软泥床面的粘性泥沙悬扬  

Cohesive sediment entrainment from soft muddy bed by waves

作　　者：练继建[1] 赵子丹[1] 

机构地区：[1]天津大学水利水电工程系

出　　处：《水利学报》1998年第8期47-51,共5页Journal of Hydraulic Engineering

基　　金：国家自然科学基金;天津市21世纪青年科学基金

摘　　要：本文考虑波浪与软泥床面相互作用，建立了计算软泥床面上波浪剪应力的理论模型．计算结果表明，床面运动对波浪床面剪应力的影响很大．对波浪作用下粘性泥沙悬扬进行了实验研究，得到了不同密度泥床粘性泥沙悬扬的临界剪切力与泥沙流变参数的关系，并与水流作用下粘性泥沙悬扬的结果进行了比较．Considering the interaction between waves and soft muddy bed, a model for the calculation of wave shear stress on soft is presented in this paper. On the basis of the calculated results for wave shear stress, the critical shear stress for the initial entrainment of cohesive sediment on muddy bed with different densities by waves is investigated by flume tests. A formula of the critical shear stress for the initial entrainment of cohesive sediment on various density muddy beds by waves is obtained and compared with the formula of the critical shear stress of cohesive sediment by currents.

关 键 词：粘性泥沙悬扬 软泥床面 剪切力 波浪 

分 类 号：TV147.3[水利工程—水力学及河流动力学] TV142