Application Research of GRP3000 Absolute Coordinates Track Survey System on Trackworks Construction

Recently for the construction and survey of trackworks construction, by using the survey instruments, like theodolite and/or hand tools are still the traditional way. For the setting of track center and rail elevation are still mainly by the theodolite and the level, and then with different instruments or tools for those different measuring item’s final adjustment and/or measurement, such as the rail gauge meter for track gauge and cant, alignment gauge block for the horizontal and vertical veracity measurement. Those traditional survey or measurement (gauge, cant/cross level, horizontal/vertical alignment, and twist) are refer to the measuring point vs. it’s adjacent point and their reference relationship in between, but can not assure the deviation between the measuring point and it’s absolute coordinates. Recently the accuracy of trackworks pavement works had been more stringent than ever before, the accuracy of traditional manually measuring method are now unable to reach the accuracy requirement, and then the high accuracy absolute coordinates survey system is now the tendency for trackworks construction. Using the Leica-GRP3000 absolute coordinates track survey system is in corporate with the high accuracy total station theodolite with additional automatic researching, wireles