Reinforcing device for special-shaped steel reinforced concrete member and construction method

The invention discloses a reinforcing device for a special-shaped steel reinforced concrete member. The reinforcing device comprises the concrete member, a plurality of steel bars are arranged in the concrete member, the section of the concrete member is in the shape of a regular hexagon, a polyurethane rigid foam thermal insulation layer is arranged on the outer layer of the concrete member and sprayed to the inner layer of a GRC non-dismantling formwork, the GRC non-dismantling formwork is connected with the steel bars through a plurality of built-in pre-embedded rings, a plurality of secondary keels are arranged on the outer side of the GRC non-dismantling formwork, the outer sides of the secondary keels are connected with a plurality of main keels, the joints of the main keels are fixedly connected with gaskets through bolts, and the main keels are connected through round steel pipes in the longitudinal direction. The lower ends of the main keels are connected with a supporting frame main keel, and a disc pin type supporting frame is arranged below the supporting frame main keel. The reinforcing device has the advantages that the structure is simple, construction is easy, it becomes possible to reinforce special-shaped steel reinforced concrete arch columns through GRC facing formworks, and reinforcing reliability is improved; the frequency of abnormal conditions is reduced during concrete pouring, and market popularization and application are facilitated.