Sleeve lining reinforcing structure for existing railway tunnel

The utility model discloses a bushing reinforcing structure for an existing railway tunnel, which comprises anchoring components and a plurality of grating steel frames arranged along the axial direction of the tunnel, each grating steel frame comprises an outer framework, an inner framework and a plurality of anchoring components, and the outer framework and the inner framework are connected through a plurality of stirrups. The anchoring assembly is used for fixedly arranging the outer framework on a tunnel lining, the anchoring assembly comprises an anchoring fastener and a chemical anchor bolt, the anchoring fastener comprises a U-shaped groove, the two free ends of the U-shaped groove horizontally extend outwards to form two wing plates, and the chemical anchor bolt can penetrate through the wing plates to be connected with the tunnel lining so that the outer framework can be tightly pressed on the tunnel lining. The device is reasonable in structure, good in stability and convenient to construct. 本实用新型公开