GPS高程在杭州湾大桥高程控制中的应用研究

Research on Application of GPS Height Measurement in Vertical Control Network for Hangzhouwan Great Bridge

根据对杭州湾跨海测区高程异常值数据的理论分析,提出了一种过渡曲面高程拟合法,并制定出海中GPS高程的施测方案,使海中GPS高程的精度满足控制桥墩承台面高程的要求,为跨海工程GPS高程的应用提供参考。

Based on the theoretical analysis about height anomalies in the vevr-bay surveying area of the Hangzhouwan Great Bridge, a height fitting method using the transitional curved surface is presented in this paper. A surveying project of the GPS geodetic height is made, in order that the precision of the GPS geodetic height in the sea satisfies the need of vertical control of pier platforms. These results are references for application of the GPS vertical surveying in sea-crossing projects.