浅谈轨道交通第三方竣工测量的实施

Preliminary Research of the Implementation about Rail Transit's Third part Finish Construction Survey

以长沙市轨道交通2号线一期工程第三方竣工测量项目为例,详细介绍了地下控制网复测、线路中线调整测量和结构断面测量的实施方案。针对平面联系测量、高精度中线放样、断面测量的实施及数据处理的难点,进行了分析和探讨;重点介绍了导线直接传递法、利用基座高精度放样法、断面测量数据处理在项目中的应用,并通过实践验证了这些方法能有效克服诸多不利因素的影响,确保了测绘成果的准确性,满足了设计要求。

Through the specific implementation about the third part finish construction survey of the first stage of Changsha Metro Line2 project was introduced,the paper expounded the solutions on the resurveying of subway control net,adjustment survey of design midline and structural section survey .And discussed the difficulties and solving methods on the plan connection survey , high precision midline lofting , section survey and data processing .The paper also dis-cussed the method of traverse survey and accurate lofting using tripod and section survey data processing in detail .Ac-cording to the practice indicated that these methods can reach to the precision of the specification defined and fulfilled the requirements of the constructions in the metro .