大跨径桥梁GPS平面控制网的布测

结合江阴长江大桥和南京长江二桥GPS平面控制网的布测,对大跨径桥梁GPS平面控制网的基准设计、控制点的布设方法、网形的优化设计,以及GPS内业数据处理等一系列的技术要点,进行了深入地探讨。通过对悬索桥和斜拉桥,两种最主要类型的大跨径桥梁的GPS平面控制网的布测进行分析,提出了针对大跨径桥梁GPS平面控制网的网形优化设计方法及GPS控制网的布测方案。

Design and surveying of long-span bridge GPS horizontal control network

In combination with the design and surveying of GPS plane control network in Jiangyin Yangtze Bridge and Nanjing Yangtze Second Bridge,the paper discusses a series of key technical points of long-span bridge GPS plane control network,such as reference design,design of control point,control network optimum design,and GPS data processing etc.Through analyzing the design and surveying of suspension bridge and cable-stay bridge GPS plane control network,two kinds of main types of the long-span bridge,the paper proposes a method about long-span bridge GPS plane control network optimum design.The program for the design and surveying of long-span bridge GPS plane control network is put forward as well.