Round shield curve section tunnel contact net trackless measurement method and system

The invention discloses a circular shield curve section tunnel contact net trackless measurement method and system, and relates to the technical field of tunnel construction measurement, and the method comprises the steps: obtaining the basic information of a circular tunnel; wherein the basic information of the circular tunnel comprises a construction type of the circular tunnel, a tunnel center line of the circular tunnel and circular tunnel track construction information; obtaining design section information of the circular tunnel according to the basic information of the circular tunnel; according to the design section information of the circular tunnel, a measurement contrast position is constructed, a measurement contrast point is arranged at the measurement contrast position by adopting laser mapping, and a datum line is constructed by utilizing the measurement contrast position and the measurement contrast point. In the embodiment of the invention, the suspension center point of the overhead line syst