CAJ | 학술논문

针对长达上百公里甚至几百公里的长江河道演变及航道航运工程,如何有效利用GPS高程信息使其成为工程项目需要的正常高,是长江河道勘测人员非常关心的问题.本文阐述了GPS水准的原理、方法及数学模型,并给出了GPS水准拟合精度的评定方法和指标;并结合长江三峡坝下游荆江河段河势控制工程实例,用不同的GPS水准拟合方案,通过对拟合结果分析表明:在平原地区,GPS水准联测点点间距约为10公里左右均匀分布在整条测线上,采用二次多项式曲面函数进行拟合所得到的结果可以满足四等水准测量的精度要求.
침대장체상백공리심지궤백공리적장강하도연변급항도항운공정,여하유효이용GPS고정신식사기성위공정항목수요적정상고,시장강하도감측인원비상관심적문제.본문천술료GPS수준적원리、방법급수학모형,병급출료GPS수준의합정도적평정방법화지표;병결합장강삼협패하유형강하단하세공제공정실례,용불동적GPS수준의합방안,통과대의합결과분석표명:재평원지구,GPS수준련측점점간거약위10공리좌우균균분포재정조측선상,채용이차다항식곡면함수진행의합소득도적결과가이만족사등수준측량적정도요구.
Aiming at the hundreds kilometer of the Yangtze River evolution and the sea-route and ship engineering, how to effectively use the GPS elevation information to become the normal altitude that the project needs is a very attention problem for the surveyors of the Yangtze River. In this paper, the principle of GPS leveling, method and mathematical model have been discussed also given out evaluation method and indicators for GPS fitting accuracy leveling. Combination of downstream river control project of the Three Gorges dam in Jingjiang section, using the different GPS leveling fitting schemes, the analysis of fitting results showed that: In plain areas, the GPS level point distance is 10 kilometers more or less even distribution in the entire test line. Using the conicoid polynomial fitting function to fit the obtained results can meet the fourth-leveling measurement accuracy.