线形输水工程施工测量控制系统的建立

Establishment of construction survey control system for linear water transfer project

文章详细介绍建立李家河水库输水工程施工测量控制网的设计技术思路和控制网布设。针对线形输水工程不同部位施工放样精度要求,建立整体统一、局部相对独立的施工平面控制网方案;采用高精度地面观测边长与GPS观测数据混合网平差方法,通过测量成果分析验证其可靠性和精度;对网状施工高程控制网的外业联测已知点的必要性进行实例介绍。

The paper presents in detail the design concept and arrangement of construction survey control network for the Lijiahe reservoir water transfer project.For the accuracy requirements of construction set-out at different locations of the linear water transfer project,an option of construction plane control network,integrated as a whole and independent locally,is set up.By use of the high-precision ground-based observation side length and the mixed network adjustment method of GPS observation data,the survey results are analyzed to justify the reliability and accuracy of the network.Besides,the paper describes the necessity of external joint survey points for the mesh construction elevation control network.