斑状糙率在多桥渡河道简化水力计算中的应用  

Application of spot roughness to simplified hydraulic calculation on river channel crossed by several bridges

作　　者：殷云珠[1] 拾兵[1] 朱金龙 郑雄 

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]江苏宿迁市水务局,江苏宿迁223800

出　　处：《水利水电技术》2012年第12期29-31,共3页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金项目资助(50879084)

摘　　要：针对多斜交桥渡对河道水力计算的局部影响,提出了一种简便的综合糙率赋值方法——斑状糙率法。并结合河道二维水流数值模拟和工程实例计算,验证了此方法的可行性和计算网格不需局部加密的优越性,并在实际的水力数值计算中得以简化,为多斜交桥渡河道防洪设计提供了一种快捷的评价方法。Aiming at the local impacts from several skew bridges on river channel, a simplified valuation method of comprehen- sive roughness, i. e. spot roughness method is put forward herein. Furthermore, the feasibility and advantage of this method got from the grid calculation without necessary refinement are verified through a relevant 2 - D numerical simulation of river flow and an actual engineering case, and then it is simplified during a hydraulic numerical calculation concerned. This method can provide a shortcut evaluation method for the flood control design of a river channel crossed by several skew bridges.

关 键 词：城市河道 斜交桥渡 斑状糙率 水力计算 数值模拟 

分 类 号：TV133[水利工程—水力学及河流动力学]