重庆羊角乌江大桥通航水流二维数学模型研究

羊角乌江大桥位于重庆市武隆县羊角镇镜内的钱粮铺滩段之内.钱粮铺滩段是重庆市境内乌江上仅有的两处安设绞滩的碍航滩险之一,水流条件复杂.采用平面二维水流数学模型,分析论证了建桥前后的通航水流条件,并从满足航道安全通航要求的角度出发,就大桥的桥址、通航净空尺度、通航安全及保障措施等提出了研究意见.研究结果为:由于桥梁左、右岸至桥墩面高程较高,基本上是一跨过江,对水流条件影响不大;下一步设计中应调整桥梁轴线方向,以增加通航净宽.

2 dimensional mathematic model for navigation flow of Yangjiao bridge on Wujiang river in Chongqing city

Yangjiao bridge on Wujiang river is located at Qianliangpu beach in Yangjiao town of Wulong county under Chongqing city. Qianliangpu beach is the only 2 navigation trouble beaches installed with towing machinery on Wujiang river and flow condition is complicated. With 2 dimensional mathematic model, the navigation flow conditions before and after the bridge constructed are analyzed, and in the view of navigation safety, the suggestions are put forward for bridge site, navigation clearance, navigation safety measures etc. The research demonstrates that for its large height and river-crossing with single span, the bridge has micro influence on flow, the axial direction of the bridge should be adjusted in next design to increase navigation clearance.