摘要
重点介绍了针对港珠澳大桥海底沉管对接过程中水下精密定位及姿态监测技术方法,采用了水上RTK定位与水下姿态监测技术相结合,并实时监测测量塔挠度,通过三维坐标转换实现了高精度的对接定位及姿态监测,开发可视化仿真模拟软件,指导沉管水下对接。简要介绍了安装定位过程的实施步骤、关键工序和定位精度分析。
This paper mainly introduce the key points on underwater tunnel tube positioning and posture monitoring of GANG-ZHU-AO Bridge,a combining method of above water-level positioning technology RTK GPS and under watet posture-monitoring technology and real-time measuring of the deflection of surveying tower.By coordinates transformation,we carry out the precise positioning and posture-monitoring of tunnel tubes,and develop the visual simulation software to guide the underwater jointing of tubes.The paper also briefly introduce the key steps and key process control and accuracy anylasis during installation and positioning.
出处
《海洋测绘》
2012年第5期25-28,共4页
Hydrographic Surveying and Charting
关键词
港珠澳大桥
姿态
挠度
管段坐标系
地理坐标系
坐标转换
三维沉管模型
GANG-ZHU-AO Bridge
posture monitoring
tube coordinate system
geographical coordinate system
coordinate transformation
3-D tube model
