山西中南部铁路通道南吕梁山特长隧道CPⅢ轨道控制网建网测量

摘要

CPⅢ planar mesh networking measurements of ballastless track in the tunnel include CPⅢ encrypted network control measurements and CPⅢ planar network control measurements for tunnel,and the connection surveying scheme of CPⅢ control points inside the cave and CPⅠ ( GPS) outside the cave are important and difficult works in networking. T his paper illustrates the ballastless track networking of southern lüliang mountain tunnel in Shanxi-Henan-Shandong railway thoroughfare which uses 960 m long 5# inclined shaft and the longer 4# inclined shaft as the connecting traverse,utilizes 2# inclined shaft for supplementary control,and makes a triangular network arrangement. T he overall accuracy of control network is enhanced and the specification requirements and considerations are introduced in this paper.%在隧道内进行无砟轨道 CPⅢ平面网建网测量，主要包括隧道段 CPⅡ加密网控制测量及 CPⅢ平面网控制测量两项工作，而解决洞内CPⅡ控制点与洞外CPⅠ( GPS)的联测方案是建网的重点和难点。本文详细地阐述了在山西中南部铁路通道南吕梁山隧道无砟轨道建网中，利用960 m 长的5#斜井和较长的4#斜井作附合导线，并利用2#斜井作补充控制，将网型呈三角形布置，提高了控制网的整体精度，并对其中的规范要求以及注意事项作了介绍。