桥墩局部冲刷的试验研究  

Experimental study on bridge pier local scour

作　　者：詹义正[1] 王军[1] 谈广鸣[1] 舒彩文[1] 李薇[1] 邓彩云[1] 

机构地区：[1]武汉大学水利水电学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2006年第5期1-4,9,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金资助项目(编号:50679065);教育部博士点基金资助项目(编号:20050486007)

摘　　要：基于桥墩局部冲刷的实际情况,提出了适用于桥墩局部冲刷的绕流挤压流动模式,同时结合泥沙起动流速,运用连续性方程、动量方程从理论上建立了桥墩局部冲刷深度的计算公式.公式建立过程中所使用的数学模式清晰,物理意义明确.最后通过野外及室内实测资料对计算公式进行验证,验证结果表明,所依据的绕流挤压流动模式是可行的,所建立公式的结构是合理的.Based on the flow structure of the bridge pier, the mode of flow pressing circumfluence is proposed. According to the principle of continuity of efficient local flow and fully considering the influential factors, a formula of scouring depth around bridge pier is built; this formula has an explicit mathematical mode and physical conception. And through the results comparisons between this formula and other formula and field data,it is shown that this formula has good adaptability and practicability.

关 键 词：桥墩冲刷 绕流挤压流动模式 起动流速 冲刷深度 

分 类 号：TV147[水利工程—水力学及河流动力学]