粗化层破坏过程中的最大推移质输沙率试验研究  

Experimental Investigation on the Maximum Bed-load Transport Rate During the Process of Armoring Layer Destruction

作　　者：聂锐华[1] 刘兴年[1] 杨克君[1] 曹叔尤[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《四川大学学报（工程科学版）》2013年第2期1-5,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(51079090);国家科技支撑计划资助项目(2012BAB05B02)

摘　　要：为了探讨清水冲刷与粗化层破坏过程中的推移质输沙率与水流强度的相关关系,进行了清水冲刷与粗化层破坏的概化试验研究。清水冲刷与粗化层破坏过程中的推移质输沙率峰值相应的无量纲输沙强度随水流强度的增大而增大,其增速较梅叶-彼德公式、拜格诺公式、恩格隆公式的计算结果明显偏大。采用梅叶-彼德公式相同的形式,通过回归得到了清水冲刷与粗化层破坏过程中的推移质输沙率峰值相应的无量纲输沙强度与水流强度的相关关系。这一成果对受清水冲刷时间较长河段的河床冲刷保护与取水防沙等有一定的参考价值。The relationship between bed-load transport rate and flow intensity was discussed.Armoring layer destruction experiments were carried out in natural channel with clear-water scour.The results showed that dimensionless transport rate strength,corresponding to the maximum bed-load transport rate,increases with flow intensity and the increasing speed is faster than the calculated results by Meyer-Peter formula,Bagnold formula,and Engelong formula.Using the same forms of Meyer-Peter formula,through regression the relationship between dimensionless transport rate strength,corresponding to the maximum bed-load transport rate,and flow intensity during the process of clear-water scour and armoring layer destruction was established.

关 键 词：推移质输沙率 清水冲刷 粗化层破坏 水流强度 

分 类 号：TV142[水利工程—水力学及河流动力学]