Dovetail flip bucket

The invention discloses a dovetail flip bucket which consists of a soleplate and side walls erected along two sides of the soleplate. The dovetail flip bucket is characterized in that the two parts of the soleplate close to the two side walls of the flip bucket are upswept curved soleplates, the middle part of the soleplate along the longitudinal part inclines downwards and stretches out, and erect side walls are arranged between the two inner edges of the curved soleplates and the two outer edges of the inclined and outstretched soleplate. The lengths of the two side walls and the soleplate connected with the two side walls of the flip bucket can be arranged to satisfy the relationship of L1=L2, or L1 L2, and the curved soleplates are arranged to be curved surfaces or warped surfaces with equal curvature. The dovetail flip bucket not only stretches the water flow longitudinally but also can lighten the impact of the incoming water flow to the soleplate and the banks of the riverbed. The depth of the flipped nappe can be greatly reduced, so the stress strains of the side walls are reduced, the height is small, the engineering work amount is small, and correspondingly the difficulty in engineering construction is reduced. Therefore, the dovetail flip bucket can have important protection to the riverbed and the side slope along the bank under the circumstance of complex geological condition of the opposite bank of the river.