Supporting device for shield tunnel rail construction

The invention discloses a supporting device for shield tunnel rail construction, and belongs to the technical field of shield tunnel rail construction, the supporting device comprises a first bolt, a second bolt, an internal thread groove, a thread part, a lubricating sleeve, a piston, a moving assembly, a clamping piece and an oil injection assembly, the thread part is clamped on the left side and the right side of a U-shaped piece, and the left side of the thread part is in threaded connection with the first bolt and the second bolt; the first bolt and the second bolt are each provided with an internal thread groove, the first bolt is sleeved with the lubricating sleeve, the piston is installed in the lubricating sleeve, the moving assembly is arranged on the left side of the piston, the clamping piece is inserted above the piston, one end of the moving assembly is arranged on the outer side of the lubricating sleeve, the moving assembly penetrates through the left side of the lubricating sleeve, and the cl