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.
出处
《水利水电技术》
CSCD
北大核心
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)
关键词
城市河道
斜交桥渡
斑状糙率
水力计算
数值模拟
urban river
skew bridge
spot roughness
hydraulic calculation
numerical simulation
