远海岛礁高程的传递方法

The method of transferring the elevation of far-sea islands and reefs

由于远离大陆,远海岛礁往往缺乏测绘基础资料,跨海高程传递是远海岛礁的工程建设中面临的一个难题。针对工程建设中远海岛礁高程传递的问题,结合国外某工程案例,论述了经纬仪倾角法、GPS水准法、同步期平均海面法,分析不同方法的原理、计算方法及适用条件。结果表明,在潮汐性质相同的海域采用同步期平均海平面法进行远海岛礁高程传递,方法简便、准确、可靠,可以作为类似项目的首选方法。

Far from the mainland,far-sea islands and reefs often lack basic surveying and mapping data,thus trans-sea elevation transfering is a difficult problem in the construction of offshore islands and reefs.Aiming at this problem,combining with an engineering case abroad,the theodolite dip method,GPS leveling method and synchronous mean sea level method are discussed,and the principles,calculation methods and applicable conditions of different methods are analyzed.The results show that the synchronous mean sea level method is simple,accurate and reliable for transfering trans-sea elevation of far-sea islands and reefs with the same tidal properties,and can be used as the preferred method for similar projects.