影响地铁精密导线测距精度的因素及改正措施  

Impact Factors and Corrective Measures for Ranging Accuracy of Metro Precise Traverse

作　　者：徐秀川[1] 段双全[1] 宋超[1] 任瑞亮[1] 

机构地区：[1]北京城建勘测设计研究院,北京市安慧里五区6号100101

出　　处：《测绘地理信息》2015年第6期35-37,40,共4页Journal of Geomatics

摘　　要：结合北京地铁6号线西延工程精密导线网测量案例,阐述了地铁精密导线网的布设要求及布设形式,介绍了影响导线测距精度的主要因素,实例验证了对导线边进行温度、气压改正及边长归化改正的必要性,总结了提高边长测量精度的具体措施。Based on the ranging case of the precise traverse network in the west extension project of Beijing Subway Line 6,the layout requirements and forms of the metro precise traverse network and the main factors that affect the ranging accuracy of traverse leg are generally introduced in this paper. Examples are conducted to verify the necessity of temperature correction,pressure correction and naturalized correct number for the traverse leg. Finally,the specific measures to improve the ranging accuracy are proposed.

关 键 词：地铁精密导线 气象改正 高程归化 投影改正 导线控制网的精度 

分 类 号：U231.1[交通运输工程—道路与铁道工程]