TLS技术在地铁隧道断面测量中的应用
Application of TLS Technology in Metro Tunnel Boundary Measurement

针对传统测量方法在地铁隧道断面测量中存在的过程复杂、效率低下等问题，本文采用地面三维激光扫描(TLS)技术，使用标靶联系测量法和导线测量法进行外业数据采集。以设计线路为基准提取隧道的连续断面，采用最小二乘法对提取的断面进行拟合，获取断面的中心坐标，与隧道设计中心进行比较，获取隧道的断面尺寸。以合肥地铁某区间为例进行试验，结果表明本文技术方法较传统监测方法能够快速实现隧道断面测量，有效提升工作效率。
In view of the problems of complex process and low efficiency of traditional survey methods in met-ro tunnel section survey, this paper uses ground three-dimensional laser scanning (TLS) technology, target contact survey and traverse survey to collect field data. The continuous section of the tunnel is extracted based on the design line, and the least square method is used to fit the extracted sec-tion to obtain the center coordinates of the section, and the section size of the tunnel is obtained by comparing it with the tunnel design center. Taking a section of Hefei Metro as an example, the test results show that the technical method in this paper can achieve tunnel section measurement faster than the traditional monitoring method, and effectively improve the work efficiency.