多转点基线两井定向在地铁联系测量中的应用  

APPLICATION OF MULTI-TURN POINT BASELINE TWO-WELL ORIENTATION IN SUBWAY CONNECTION SURVEY

作　　者：杨定强 许锋 YANG Ding-qiang;XU Feng(China Railway Liu Yuan Group Co.,Ltd.,300000,Tianjing,China;Ningbo Rail Transit Group Co.,Ltd.,315000,Ningbo,Zhejiang,China)

机构地区：[1]中铁第六勘察设计院集团有限公司,天津300000 [2]宁波市轨道交通集团有限公司,浙江宁波315000

出　　处：《建筑技术》2025年第2期184-186,共3页Architecture Technology

摘　　要：以某地铁为例介绍在长车站向大里程方向完成隧道掘进后,在小里程进行始发时,车站站厅层已移交验收,预留孔已封闭、车站大里程已铺轨条件下,采用多转点基线进行两井定向、观测多组钢丝、将多转点基线起点边、终点边取均值作为起算成果,进行附合导线平差、检核多转点基线点内外符合性,经多阶段联系测量,多转点基线起点边、终点边多次均值情况下,确保了机车厂站至二仙桥站小里程盾构区间隧道的顺利贯通,经贯通误差测量,地下控制点联测成果精度,表明该方法能指导隧道的顺利贯通,保障测量精度。Taking a subway as an example,this paper introduces that after tunneling is completed from the long station to the large mileage direction,when the small mileage starts,the exhibition floor of the station has been handed over for acceptance,the reserved hole has been closed,and the track of the large mileage of the station has been laid,the multi-turn point baseline is adopted for two well orientation,multiple sets of steel wire are observed,and the average of the starting and ending edges of the multi-turn point baseline is taken as the starting result.The adjustment of the attached wire and the conformity of the baseline points of the multi-turn points were checked.The multi-stage connection survey ensured the smooth completion of the tunnel between the locomotive factory station and Erxianqiao station under the condition of multiple mean values of the starting and ending points of the baseline points of the multi-turn points.The accuracy of the results of the joint measurement of underground control points showed that the method could guide the smooth completion of the tunnel.ensure the measurement accuracy.

关 键 词：两井定向 盾构 基线 

分 类 号：P258[天文地球—测绘科学与技术] U25[交通运输工程—道路与铁道工程]