Squeezing and expanding device for branch pile

The utility model relates to a branch pile squeezing and expanding device, and belongs to the technical field of branch pile construction. The branch pile squeezing and expanding device comprises a shell, the shell is connected with the end of a drilling rod of a drilling machine, a squeezing and expanding groove is formed in the side wall of the shell, a first hydraulic rod is arranged in the squeezing and expanding groove, a piston rod of the first hydraulic rod is connected with a squeezing and expanding block, and at least two squeezing and expanding sleeves are hinged to the interior of the squeezing and expanding groove; an extruding and expanding arm is arranged in the extruding and expanding sleeve in a sleeved mode, the extruding and expanding arm is hinged to the extruding and expanding block, a pouring channel is formed in the shell, and a plugging assembly used for sealing the pouring channel is arranged in the shell. The method has the effects of reducing the condition that a soil layer on the si