超长隧道横向贯通误差分析--洞内平面控制测量部分

摘要

国内超长隧道工程越来越多，而针对20 km以上隧道的横向贯通误差限差问题尚缺乏规范与经验，针对此问题，文中利用CODAPS软件包，具体分析直线型和曲线型超长隧道横向贯通误差的影响因素。通过模拟分析，得出导线网边长、测角精度、测边精度对横向贯通误差的影响规律，为理论研究和工程实践提供借鉴和参考。%There is an increasing number of super long tunnels in China ,but technical standards and experiences about lateral breakthrough error range of super long tunnels w hich are more than 20 km are lacking .Aiming at this problem ,it analyzes the lateral breakthrough error influence factors of liner and curved super long tunnel in the use of CODAPS software .And through the simulation analysis ,laws of edge length of traverse ,angle measuring accuracy and baseline measuring accuracy affecting lateral breakthrough error are obtained ,w hich have a certain reference value for the relevant theoretical research and engineering practice .