Construction technology for simply supported and continuously supported external prestressed continuous beam bridge T-shaped section

The invention discloses construction technology for a simply supported and continuously supported external prestressed continuous beam bridge T-shaped section, which comprises the following steps of: a, prefabricating a concrete T-beam, and tensioning an internal prestressing tendon; 2, setting up the concrete T-beam, namely setting up the concrete T-beam hole by hole, and inserting an external prestressing tendon; c, pouring the concrete T-beam, namely pouring wet joints of the beam end on the top of piers to longitudinally form a continuous structure, transversely connecting cast-in-place wet joint transversely passing between wing plates and transverse clapboards into a whole, and tensioning the external prestressing tendon for the first time; and d, constructing a bridge floor system, and tensioning the external prestressing tendon again. The construction technology has the characteristics of convenient exchange of prestressing tendon, low friction loss, light hoisting weight of the beam body, easy assembly and construction, and thin thickness of bridge floor pavement.