Construction method of special-shaped upturning beam structure

The invention relates to a construction method for a special-shaped upturning beam structure. The construction method comprises the steps of connecting both ends of a bottom formwork in the length direction with corresponding shear wall formworks in a butt joint mode according to the position of the bottom elevation of the upturning beam structure; constructing above the bottom formwork corresponding to a first area so as to form a reinforcing steel bar structure which is matched with the first area, and enabling the reinforcing steel bar structure to extend into the first area; vertically arranging a plurality of opening hoops on the bottom formwork at intervals in the length direction of the bottom formwork on the side part of a second area, and partially inserting the opening hoops into the steel bar structure; arranging a plurality of first steel bars in the opening hoops in a penetrating mode, and fixedly arranging the first steel bars on the opening hoops at intervals along the side parts of the opening