基于自由测站的隧道围岩收敛非接触监测的新方法研究

为了满足长大隧道快速、安全施工的需求,通过分析隧道周边围岩的变形规律,提出了一种基于全站仪自由测站的隧道围岩收敛非接触监测的新方法。研究表明,利用所述的新方法,能够快速、准确地完成隧道施工期间的拱顶下沉和净空变化量测工作。与传统的监控量测手段相比,新方法不仅能适应恶劣的洞内测量环境,达到及时反馈围岩收敛变形信息的目的,而且能够满足相关规范的精度要求,为隧道监控量测开辟了新的途径。

On a New Method of Non-contact Monitoring for Tunnel Surrounding Rock Convergence Based on Free Station

To meet the requirements of fast and safe construction of long-and-large tunnels,this paper puts forward a new method of non-contact monitoring for tunnel surrounding rock convergence based on free station of a total station,by analyzing the deformation laws of rock around the tunnel.The research suggests that,with the method,crown settlement and convergence of inner perimeter in the period of tunnel construction can be measured fast and precisely.Compared with the traditional monitoring measurement methods,the new method not only can adapt to the poor measurement environment inside the tunnel, to achieve timely feedback of surrounding rock convergence and deformation,but also can meet the accuracy requirements of relevant specifications,so it opens up a new way for tunnel monitoring measurement.