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一、桥下流向问题 现有计算方法,都是假定水流通过桥下时流向不发生改变。而实际上水流通过斜交桥孔时流向必然发生改变。通过74场次模型试验的实测桥下流向线,分析归纳找出了水流通过桥孔转弯的角度r与桥孔总压缩比M_0(包括路堤和桥墩两种压缩)和斜交角α的关系图。如图1,据以制成关系表如表1。
First, the flow under the bridge The existing calculation methods, are assumed that the flow does not change when the flow through the bridge. In fact, the flow of water through the cross hole when the bridge is bound to change. Based on the measured flow lines under the bridge of 74 field tests, the relationship between the angle r of water flow passing through the bridge hole and the total compression ratio M_0 (including embankment and piers compression) and skew angle α is analyzed. Figure 1, according to the relationship between the table in Table 1.