大型过江隧道控制测量关键技术研究  

Research on Key Technology of Control Survey for Large River Crossing Tunnels

作　　者：白芝勇 Bai Zhiyong(The Fifth Engineering Co.,Ltd.of China Railway First Engineering Group,Baoji 721006,China)

机构地区：[1]中铁一局集团第五工程有限公司,陕西宝鸡721006

出　　处：《铁道勘察》2022年第4期1-4,共4页Railway Investigation and Surveying

摘　　要：对于单向掘进的大型跨江隧道,如何保证隧道的掘进方向并使隧道顺利贯通,是隧道洞内控制测量需要解决关键问题。以南京市定淮门长江隧道的控制测量为例,详细阐述隧道洞内控制测量所采用的关键性技术:洞内平面控制网布设为交叉导线网,并在隧道掘进方向的1/3处及2/3处加测精密陀螺定向边,借助竖井增加测量精度。研究表明,采用该方法可保证隧道掘进方向的三维坐标精度,最终使隧道顺利贯通。In the case of large river crossing tunnels with unidirectional boring,the key issue to be addressed in the control measurement of tunnels is the way to ensure the tunnel boring direction,so that the tunnel can be successfully connected.Taking the control measurement of the Ding Huaimen Yangtze river tunnel in the city of Nanjing as an example,this paper explained the key techniques of control measurement during the tunnel construction.In the plan,the cave planar control network was laid out as a cross-conductor network,and the precision gyro directional edge was added at 1/3 and 2/3 of the tunnel boring direction.The plan ensured the accuracy of the 3D coordinates in the tunnel boring direction by means of additional contact measurements in the shaft,which eventually allowed the tunnel to be successfully connected.

关 键 词：过江隧道 交叉导线网 控制测量 竖井联系测量 陀螺定向边 贯通 

分 类 号：P258[天文地球—测绘科学与技术] U456[建筑科学—桥梁与隧道工程] U459.2[交通运输工程—道路与铁道工程]