桐子林水电站施工测量控制网2011年复测成果分析

Analysis of repeat survey products of control network for engineering surveying at Tongzilin hydropower station

本文先阐述了桐子林水电站施工测量控制网2011年度的复测工作,之后对复测成果进行了分析评价。本次复测采用了全球最新一代精密测量全站仪徕卡TM30,作业过程规范,外业数据全部进行了检验,检验结果符合规范要求。在平差计算前,对控制网点的稳定性用平均间隙法进行了计算,利用校核条件进行了校核,找到稳定可靠的起算点。平差计算科学、严密,成果质量优良,各项精度指标达到规范的要求,满足为桐子林水电站主体工程建设施工测量提供基本的平面及高程控制的要求,同时也使本次复测的精度相比往年大大提高。

This paper presents repeat control network surveying work in 2011 at Tongzilin hydropower station and the obtained results are analyzed and evaluated.The surveying work is conducted by the advanced total station Leica TM30 and follows the strict standard procedures.Before taking adjustment,the stability of control points is tested by using Hannover-method.The surveying adjustment was rigorous and the precision index reached the requirement of the specifications.The products of the control network can satisfy the requirements of horizontal and elevation control for Tongzilin hydropower station′ s construction surveying,and the precision of this repeat surveying greatly increased comparing with that of last year surveying.