CAJ | 학술논문

针对引江济江工程线路长、建筑物多的情况，在施工控制网的设计中，采用骨干网和二、三等网组成的多层次GNSS网优化布设方案，显著提高了点位精度，并且首次提出了基于 GNSS向量方差-协方差估计的GNSS网设计方法。测量结果显示，近70 km长线路的点位精度达到亚厘米级，满足通水和通航施工及施工期安全监测的要求，设计坐标的转换确保了交叉建筑物与渠道中线相对位置的准确性。该工程施工控制网设计成果对大型调水工程施工控制网测量具有重要的参考价值。
침대인강제강공정선로장、건축물다적정황，재시공공제망적설계중，채용골간망화이、삼등망조성적다층차GNSS망우화포설방안，현저제고료점위정도，병차수차제출료기우 GNSS향량방차-협방차고계적GNSS망설계방법。측량결과현시，근70 km장선로적점위정도체도아전미급，만족통수화통항시공급시공기안전감측적요구，설계좌표적전환학보료교차건축물여거도중선상대위치적준학성。해공정시공공제망설계성과대대형조수공정시공공제망측량구유중요적삼고개치。
Due to long construction lines and diversified buildings, an optimized layout scheme of multi-level GNSS network consisting of stem network, second grade network and third grade network is applied to achieve the significant improvement of the precision of point locations. It is the first time to put forward a design method for GNSS network based on vector-based variance-covariance estimation. The measurement results show that precision of the locations of long line with nearly 70km reaches sub-cm level and meet the requirements of water-passing, construction of navigation channel, and safety monitoring during the construction period. The accuracy of the relative position of the cross structure and midline of the channel was ensured by the conversion of design coordinate.