The invention relates to a large
cantilever beam board combined type formwork
supporting system. The large
cantilever beam board combined type formwork
supporting system mainly comprises: a
cantilever beam, a connecting beam, a steel
wire rope, an inclined strut, a pre-pressing water bag, a bottom adjusting part, a jack, a U-shaped bolt, a turnbuckle, a bottom-layer protection board, an anti-sliding angle steel board and an angle steel clamp. The invention further relates to a construction method of the large cantilever beam board combined type formwork
supporting system; the construction method mainly comprises the following steps: (1) setting the bottom adjusting part; (2) manufacturing and mounting the cantilever beam; (3) mounting the bottom inclined strut; (4) mounting the steel
wire rope; (5) erecting a formwork support; (6) pre-pressing the supporting
system; (7) carrying out concrete pouring construction. The structure provided by the invention is convenient to detach and convenient to pre-press; the cantilever beam supporting
system has a multi-safety effect through the combined action of flexible unloading of the steel
wire rope, a lower supporting structure and the bottom adjusting part, and the safety of cantilever beam supporting is sufficiently guaranteed; a tool
type metal pressing protection board is arranged on a bottom layer of a frame body, so that the frame body is safe to erect and the economic and technical benefits are relatively good.