Supporting plate overhead type pile cap straining beam structure and construction method thereof

The invention discloses a supporting plate overhead type pile cap straining beam structure and a construction method thereof, and belongs to the field of civil engineering construction and pipe pile caps. The structure comprises a pile cap body and an inter-pile straining beam, and the pile cap body is arranged at the top of a pipe pile and comprises a pile top supporting plate connected with a pile top end head plate in a welded mode, a cap body stress steel reinforcement framework and steel reinforcement meshes installed at the upper end and the lower end of the cap body stress steel reinforcement framework respectively. The cap body load-bearing steel reinforcement framework comprises transverse connecting ribs, longitudinal load-bearing ribs and longitudinal load-bearing rib hoops; the inter-pile straining beam is arranged between every two adjacent pipe piles, an inner inter-pile straining beam steel reinforcement framework comprises an upper through rib, a lower connecting rib and a stirrup, and the sti