一种改进的斜拉桥索道管精密定位方法

An Improved Precise Positioning Pethod of Cable Duct's Precision in Cable-Stayed Bridge

提出一套直接定点和间接测量相结合的斜拉桥索道管精密定位方法。建立索道管独立坐标系,把描述索道管位置信息的三维坐标方向修改为上下游方向、垂直管方向及索长方向,并建立转换关系,通过放样索道管定位参考点,并用其指导安装的方式,实现快速、全天候地定位索道管。实践证明,该方法初次安装后的索道管精度较高。

An improved cable duct＇ s precision positioning method in cable-stayed bridge was put forward in this paper. A cable duct＇ s independent coordinate system was built and the 3D coordinate components of describe cable duct was changed to river direction, perpendicular to duct＇ s direction and cable＇ s direction.A reference point was setting out and was used to direct the cable duct＇ s installing.Practice shows that the cable duct could reach to a very high accuracy when using this method.