沉管安装测量塔坐底式标定技术研究及应用

Research and application of bottom sitting calibration technology for immersed tube installation measuring tower

测量塔在深坞区沉管二次舾装期间安装,为提高沉管安装定位精度,选择将沉管坐落在深坞底进行标定。文中论述一种沉管坐底式标定方法,通过在沉管顶部指定位置和测量塔顶安装定位装置,确定定位装置在沉管坐标系中的位置;进而同时采集管顶与测量塔顶定位装置的定位信息。该定位信息得出测量塔定位装置在沉管坐标系中的坐标。

The measuring tower is installed during the secondary outfitting of the immersed tube in the deep dock area,in order to improve the positioning accuracy of the immersed tube,the immersed tube is selected to be located at the bottom of the deep dock for calibration.In this paper,a method of bottom sitting calibration of immersed tube was described.The position of the locating device in the coordinate system of the immersed tube was determined by setting the positioning device on the top of the immersed tube and installing the locating device on the top of the measuring tower.Then,the positioning information of the positioning device on the top of the tube and the measuring tower was collected simultaneously.The positioning information is used to obtain the coordinates of the positioning device of the measuring tower in the coordinate system of the immersed tube.