上海片内非通航河道跨河桥梁梁底高程研究

上海地处太湖流域下游,地区河网密集,地势低洼,跨河桥梁数量众多。由于上海地区地势低洼,桥梁工程梁底高程控制往往与桥梁接坡之间存在较大的矛盾。通过综合分析片内非通航河道行洪安全、规划堤顶高程、作业船舶通行等方面的需求,根据河道等级提出桥梁梁底高程优化取值建议。以长宁区为例,分析该区桥梁梁底高程合理取值范围,为区域桥梁梁底高程控制提供一定参考。

Study and Discussion on Beam Bottom Elevation of Cross-river Bridge in Non-navigable Channel of Shanghai

Shanghai is located in the lower reaches of the Taihu Lake Basin,where the river network is dense,low-lying and there are many bridges across the river.Due to the low lying of Shanghai,there is a big contradiction between the beam bottom elevation control and the bridge connection slope in the bridge engineering.By comprehensively analyzing the flood safety of non-navigable channel,the planned levee crown elevation and the operating vessel traffic in the area,and based on the river grade,the suggestion of optimizing value for bridge beam bottom elevation is proposed.Taking Changning District as an example,the reasonable valuing range of bridge beam bottom elevation in this district is analyzed,which provides a certainreference for the control of bridge beam bottom elevation in an area.