摘要
在城市轨道交通建设过程中,小井口竖井越来越多,如何通过小竖井将地面坐标准确传递至隧道内是施工测量面临的重要问题,目前应用较多的是联系三角形法。本文通过在北京地铁8号线二期工程小井口竖井联系测量中的应用得出,采用后方交会法进行平面联系测量是完全可行的,施测过程相对简单,测量精度也满足规范要求,对小井口竖井的平面联系测量具有一定的指导意义。
In the process of subway construction,how to ensure the measurement precision through a small wellhead shaft to tunnel is an important problem. This paper analyzed the measurement precision of resection and double contact triangle in the small wellhead shaft of subway,the method of resection is adopted to plane contact measurement,and gave a case in Beijing subway line 8,the result shows that the method is feasible,measuring process is relatively simple,measurement precision meets the specification requirement. It has a certain guiding significance to the plane contact measurement of wellhead shaft.
作者
刘瑞敏
高帅
马全明
Liu Ruimin;Gao Shuai;Ma Quanming(Beijing Urban Construction Exploration&Surveying Design Research Institute Co.,Ltd.,Beijing 100101,China)
出处
《城市勘测》
2019年第6期163-166,共4页
Urban Geotechnical Investigation & Surveying
关键词
小井口竖井
平面联系测量
联系三角形
后方交会
精度
small wellhead shaft
plane contact measurement
contact triangle
resection
precision
