Construction method and structure for arch-covering-method station from main body to auxiliary body

The invention provides a construction method and structure for an arch-covering-method station from a main body to an auxiliary body. Besides a first supporting structure, a second supporting structure, a third supporting structure and a fourth supporting structure, a cast-in-place beam system composed of arch foot longitudinal beams, a conversion ring beam, conversion longitudinal beams and supporting column beams is further arranged. In the system, stratum loads can be transmitted to the arch foot longitudinal beams and the conversion ring beam through the first supporting structure, the second supporting structure, the fourth supporting structure and the like, the arch foot longitudinal beams transmit the loads to a rock stratum, the conversion ring beam transmits the loads to the conversion longitudinal beams, and then the conversion longitudinal beams transmit the loads to the supporting column beams. Due to the fact that the supporting column beams are supported by the ground ofan auxiliary initial sect