地铁工程短地下定向边下两井定向测量方法的改进研究  

Research on the Improvement of the Directional Survey Method of Two Wells Under the Short Underground Directional Side of the Subway Project

作　　者：袁兆奎 YUAN Zhaokui(The Survey and Design Institute of Wuhan Municipal Engineering Design&Research Institute Co.,Ltd.,Wuhan 430023,China)

机构地区：[1]武汉市政工程设计研究院有限责任公司,湖北武汉430023

出　　处：《城市勘测》2024年第1期153-155,共3页Urban Geotechnical Investigation & Surveying

摘　　要：在地铁工程中,竖井定向测量非常重要,一般采用两井定向。受现场施工进度影响,在盾构始发及掘进前期两井定向时地下定向边会出现较短的情形。本文提出了地铁工程短地下定向边下两井定向测量方法的改进方案,通过增加吊垂线的数量从而提高两井定向的精度与可靠性,并结合工程实例估算其对贯通误差的影响。实践表明:该改进方法是有效的。In subway engineering,the directional measurement of vertical shafts generally adopts the two-well directional method.Affected by the construction progress of the site,in the initial stage of shield tunneling and excavation,the underground directional edges may will be short.In this paper,an improved scheme of directional measurement method of two wells under short underground directional edge of metro engineering is proposed,which improves the accuracy and reliability of the orientation of the two wells by increasing the number of hanging lines,and estimates its influence on the penetration error based on engineering examples.Practice shows that the improvement method is effective.

关 键 词：地铁工程 短地下定向边 两井定向 定向的精度与可靠性 

分 类 号：P258[天文地球—测绘科学与技术]