免棱镜全站仪在高速公路改扩建中的精度分析
Accuracy Analysis of Prism-Free Total Station in the Reconstruction and Extension of Expressway

在高速公路改扩建的过程中，测量环境中有高速行驶的车辆，普通的有棱镜全站仪测量危险系数过高。因此，免棱镜全站仪有着较为明显的优势，拥有着较高精度的同时，也大大保证了测量人员的安全。本文使用免棱镜全站仪和有棱镜全站仪进行高速公路改扩建的测量，根据实际测量所得的数据进行平面和高程数据分析，通过分析结果对免棱镜全站仪进行了评估。经具体项目计算分析，使用免棱镜全站仪进行高速公路改扩建的测量，其精度完全符合测量精度标准。
In the process of reconstruction and expansion of expressway, there are high-speed vehicles in the measuring environment, and the danger coefficient measured by ordinary prism total station instrument is too high. Therefore, the prism-free total station instrument has obvious advantages, with high accuracy, but also greatly guarantees the safety of surveyors. In this paper, the prism total station and prism-free total station are used to measure the reconstruction and expansion of expressway. The plane and elevation data are analyzed based on the actual measured data, and the prism-free total station is evaluated by the analysis results. Through research, analysis and verification, the elevation measurement of expressway reconstruction and expansion using prism-free total station instrument is fully in line with the measurement accuracy requirements.