Tensioning device for pencil type pipe pile

A tensioning device of a pencil type tubular pile comprises a tubular pile body, a cone-frustum-shaped pile tip, a PC main rib and a tensioning plate, the PC main rib is arranged on the tubular pile body and extends out of the cone-frustum-shaped pile tip, a cylindrical head is arranged at the end of the PC main rib, and circular holes distributed in a circumferential shape are formed in the tensioning plate; the steel bar tensioning device further comprises a steel bar clamping head and a tensioning screw, the steel bar clamping head is detachably connected with the PC main bar and the cylindrical head, the rod portion of the tensioning screw penetrates through the circular hole in the tensioning plate to be detachably matched with the steel bar clamping head, and the head portion of the tensioning screw is attached to the outer surface of the tensioning plate. Compared with the prior art, the steel bar clamping heads and the tensioning screws are arranged, and the steel bar clamping heads, the tensioning pl