Cable-supported large-span structure and construction method therefor

Disclosed are a cable-supported large-span structure and a construction method therefor. The cable-supported large-span structure comprises a primary bearing structure (1) and a secondary bearing structure (2), wherein the primary bearing structure (1) comprises vertical force-bearing members (11) and a horizontal force-bearing member (12) fixed at the top ends of the vertical force-bearing members (11); the horizontal force-bearing member (12) is erected on at least two vertical force-bearing members (11); the secondary bearing structure (2) comprises at least one cable-supported assembly (21); each stage of cable-supported assembly (21) comprises a stay cable (211), and a mast (212) vertically arranged on the horizontal force-bearing member (12); and one end of each of the stay cables (211) is fixed to a fixing member (3) or the horizontal force-bearing member (12), and the other end thereof is fixed to the horizontal force-bearing member (12) by means of the top of the mast (212). The secondary bearing structure (2) is arranged on the primary bearing structure (1), and the horizontal force-bearing member (12) is pulled up using the stay cables (211), such that the stability of the horizontal force-bearing member (12) is ensured. A structural system and a building effect can be integrated, such that a cable structure and other structures can be combined in an innovative way in order to exert their respective advantages, and a one-stage cable-supported assembly or a multi-stage cable-supported structure can be arranged according to the building form and the structure bearing condition.