地铁长隧道一井定向方法的改进研究  

Study on the Improvement of Orientation Method for One Well of Metro Long Tunnel

作　　者：孙士通 王永锋[1] 杨彬[1] Sun Shitong;Wang Yongfeng;Yang Bin(Hangzhou Geotechnical Engineering &Surveying Research Institute Co.,Ltd.,Hangzhou 310012,China)

机构地区：[1]杭州市勘测设计研究院有限公司,浙江杭州310012

出　　处：《城市勘测》2022年第2期156-158,共3页Urban Geotechnical Investigation & Surveying

摘　　要：针对传统一井定向方法,尤其在地铁长隧道,隧道曲线半径较小、地下始发边较短及定向边受施工干扰不易保持其稳定性的问题,提出了一种一井定向井下联系测量控制点采用任意设站布点方式的改进方法。工程实例实验结果表明,改进方法提高了地铁长隧道一井定向精度,且极大提高了井下隧道定向边测设的稳定性,保证了定向边方位角的精准性,且无须频繁进行联系测量,节约时间和经济成本。Aiming at the traditional one well directional method,especially in the long subway tunnel,with small curve radius,short underground starting edge and construction stability,a new method connects the measurement control point.A new method is adopted to optimize the conventional directional contact measurement of the first well,so as to better avoid the short directional edge of the one well directional method,the stability and accuracy of the azimuthal angle of the starting side,and the frequent number of contact measurements.The experimental results of the new method for the contact measurement control point of a well show that the new method improves the directional accuracy of a well in the subway tunnel,greatly improves the instability of the directional azimuth,and requires no frequent contact measurement to save time and economic cost.

关 键 词：地铁长隧道 一井定向 任意设站 精度评定 

分 类 号：P258[天文地球—测绘科学与技术]