Construction method for shield crossing railway line

The invention discloses a construction method for a shield crossing railway line. The method comprises the steps that auxiliary beams and cross beams are adopted for reinforcing and suspending operation on railway tracks within the influential range of a shield lower-crossing embankment, and meanwhile railroad beds are subjected to grouting reinforcement; a first test tunneling section is constructed in the construction section of the shield crossing railway line, and construction parameters of remaining tunneling sections of the construction section of the shield crossing railway line are deduced according to shield propulsion parameters and ground settlement deformation rules; construction of the remaining tunneling sections of the construction section of the shield crossing railway line is completed according to the deduced construction parameters. According to the method, the auxiliary beams and the cross beams are adopted for reinforcing and suspending operation on the railway tracks within the influenti