Abstract:

This paper does some research works of the measurement, analysis and adjustment methods based on T-shaped grooved rail smoothness, aiming at solving the problem that it is difficult to detect and analyze the smoothness of T-shaped grooved rail under construction. The high-precision three-dimensional control network is built in the tube by using the free station measurement technology, which solves the problem that it is difficult to establish the measurement reference due to the limitation of the environmental conditions in the tube. Based on the control network, the three-dimensional coordinates of each measuring point on the grooved rail are measured by using the technique of free station measurement and polar coordinate measurement, which provides the basic data for the analysis of T-shaped grooved rail smoothness. In order to determine the smoothness quality of the grooved rail, the deviation of each measuring point on the grooved rail is quantified into four statistical indexes by statistical analysis method. The results show that the selected four indexes can quantitatively and comprehensively reflect the smoothness quality of the grooved rail. In order to improve the smoothness of the grooved rail, a method is proposed to calculate the adjustment amount based on the deviation of each measuring point on the grooved rail and to fine adjustment. The results show that the method can significantly improve the smoothness of the grooved rail.

Key words: evacuated tube maglev train, T-shaped groove rail, free station measurement, smoothness, groove fine adjustment