特长隧道平面独立控制网布设  

Independent Horizontal Control Network Layout for Super Long Tunnel

作　　者：叶昌尧 

机构地区：[1]中铁二十二局集团有限公司,北京100043

出　　处：《铁道建筑技术》2013年第3期95-98,共4页Railway Construction Technology

摘　　要：在铁路、公路等项目中,经常存在设计控制网精度、密度满足不了长大隧道等大型建筑物施工测量精度要求的情况,需要布设满足施工精度要求的独立控制网。以太兴铁路二青山特长隧道为例,介绍该隧道如何建立独立坐标系,采用固定一点一方位平差的方法来提高控制网精度,满足测量规范精度要求。The density and accuracy of the designed control net cannot meet the accuracy demand of some big railway and highway projects. Therefore, setting up an accurate and independent control net is in great need. This article takes Erqing- shan Mountain Super Long Tunnel along the TaiXing railroad as an example to introduce how to establish an independent coordinate system with the method fixing one point and one azimuth angle adjustment to improve the accuracy and meet the demanding standard for measurement.

关 键 词：特长隧道 独立控制网 独立坐标系 

分 类 号：P258[天文地球—测绘科学与技术] U452.13[建筑科学—桥梁与隧道工程]