地下支导线加测陀螺定向测量方法及精度评定  

The Measuring Method and Accuracy Assessment of Open Traverse Additional Gyro-orientation

作　　者：杨锋 孙帅印 YANG Feng;SUN Shuaiyin(Beijing Urban Construction Exploration and Surveying Design Research Institute Co.,Ltd.,Beijing 100101,China)

机构地区：[1]北京城建勘测设计研究院有限责任公司,北京100101

出　　处：《城市勘测》2024年第2期115-118,共4页Urban Geotechnical Investigation & Surveying

摘　　要：地铁隧道施工期间,平面控制测量一般采用支导线的方式,可通过加测陀螺方位角来提高和改善地下支导线的精度和可靠性。为确保观测质量,确定观测方案时需分析观测过程中的各种限差。结合工程实例,介绍了陀螺定向观测方法,分析了观测过程中的主要误差来源,确定了陀螺方位角观测过程中的限差,提出了地下支导线加测陀螺方位角的后续数据处理方法并进行精度评定。During the construction of subway tunnel,horizontal control survey usually adopts open traverse,the accuracy and reliability of open traverse can be improved by measuring the gyroscope azimuth angle.In order to ensure observation quality,we have to research the limit during the measurement process when determining the observation plan。Combining with the examples of project,this paper introduces the observation method of gyroscope azimuth angle,analyzed the main sources of errors and confirmed the limit during the measurement process,research the data processing method and accuracy evaluation of open traverse additional gyro-orientation.

关 键 词：支导线 陀螺定向 限差分析 精度评定 

分 类 号：P258[天文地球—测绘科学与技术] P207