超大型导管架尺寸巨大,坐标控制网分布更广,运用传统坐标控制网测量卧式建造超大型导管架高程时,地球曲率会带来较大的高程误差,不能保证超大型导管架尺寸精度。针对传统坐标控制网测量超大型导管架不能有效消除地球曲率带来的高程误差问题,提出一种基于一站式坐标控制网的三维坐标转换方法,该方法用高精度全站仪在一个位置测量全部站点坐标,在导管架卧式建造过程中通过站点三维坐标转换将被测点转换到一站式坐标系中,有效消除地球曲率对导管架高程的影响。超大型导管架高程测量实验结果表明,运用基于一站式坐标控制网的三维坐标转换方法,无论全站仪架设在任何位置，高程测量值都基本一致,消除了地球曲率导致的高程误差。基于一站式坐标控制网的三维坐标转换方法对于超大型导管架尺寸精度控制具有重要作用。

The super-large jacket is huge in size and the coordinate control network is more widely distributed. When using the traditional coordinate control network to measure the height of super-large jacket, the curvature of the earth will cause large error in elevation as the fabrication of the tall jacket is done while lying horizontally on the ground. As a result, the dimensional accuracy of the fabricated super-large jacket cannot be guaranteed. In the view of the fact that traditional jacket control network cannot effectively eliminate the error caused by the curvature of the earth, a three-dimensional coordinate transformation method based on a one-stop coordinate control network is proposed. A high precision total station is used to measure all station coordinates in one position. During the horizontal construction of the jacket, the measured points are converted into a one-stop coordinate system by the transformation of the three-dimensional coordinates of the station. So it can effectively eliminate the jacket elevation error caused by earth curvature. The experimental results show that the elevation measurement value is basically the same using the three-dimensional coordinate transformation method based on one-stop coordinate control network no matter where the total station is erected. Hence this approach can eliminate the error caused by the curvature of earth, which is of great significance to accurately control the dimension of super large jacket.