Aiming at the disadvantages of traditional foundation pit horizontal displacement and vertical displacement monitoring meth-ods such as cumbersome operation and low efficiency, this paper adopts Leica TS15 intelligent total station free station method to im-prove it and realizes the fast and simultaneous acquisition of horizontal and vertical displacements of the top of the foundation pit enve-lope structure. By expounding the principle and adjustment process of the free station method in detail, this paper uses a building foundation pit project to carry out an example application, analyzes and studies the station setting accuracy, and compares and analy-zes the deformation data obtained by the traditional monitoring method. The results show that: the root mean square error of free station point is about 2 mm, which meets the requirement that the root mean square error of the station point is less than 3 mm in the specifi-cation. The difference as compared with the traditional monitoring method is relatively small and meets the accuracy requirements of the second-class foundation pit monitoring specification. When it applies to the first-class foundation pit monitoring, a high-accuracy total station with an angle measurement accuracy of 0.5″ should be used for monitoring operations to ensure that the monitoring data meets the specification accuracy requirements.
关键词
智能型全站仪/自由设站法/中误差/变形监测
Key words
intelligent total station/free station method/root mean square error/deformation monitoring
维普
万方数据