GPS海上定位技术在预制墩台吊装精调中应用

Application of GPS marine position technology on accurate adjustment of lifting and installation of precast pier

预制墩台吊装定位与精调是港珠澳大桥试验工程的关键工序之一,必须制定合理的精度控制标准。采用GPS对海上预制墩台吊装进行定位并按精度要求调节到精确平面和高程位置,以及精度要求范围内的垂直度,进一步验证了测量系统设计合理性,对存在问题给出了可行性建议。

It is one of the key processes of Hong Kong-Zhuhai-Macao Bridge trial engineering that is lifting and installment the accurate adjustment and positioning of precast pier, a reasonable standard of accuracy control must be formulated. The precast pier is positioned and adjusted to the accurate lifting plane, elevation position and vertical range according to the precision requirement by GPS marine position. Further, the rationality of the measurement system design is validated. It provides feasible suggestions for the existing problems.