不同边坡河道交汇处岸线的连接设计及放样

两条边坡不同的河道交汇时,中心线可用圆弧线连接。但由于边坡不同,故岸线等不可能在中心圆弧线切点的同一截面处用较小半径的同心圆弧线来连接。为保证交汇处河道均匀渐变,可设计椭圆线连接两河岸线。用数介法可得椭圆的圆心及长、短半径,用CAD可绘出椭圆线,并为经纬仪或GPS放样提供数据。

Connection Design and Setting-out of Bank Line at Interface of River with Different Side Slopes

The central line can be connected by curved line when two different side slopes of river are interfaced.Owing to the different side slopes,the bank line can not be connected by the smaller radius of concentric curved line at the same section of the contact point of the central curved line. In order to guarantee the river changing evenly and gradually at the interface,the elliptic line can be designed to connect two river bank lines.The digital solving method can get the elliptic center,and long and short ra...