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.