Boosting type pile clamping device

A boosting type pile clamping device comprises a pile pipe, clamping devices and a jacket pile barrel. A pile clamping device structure body is fixed on the pile pipe in a welding connection mode. The plurality of clamping devices are arranged on the lower portion of the pile clamping device structure body, and face the periphery of the structure body. Each clamping device is formed by an oil cylinder, a pile clamping device wedge block box, an axial moving wedge block, a radial moving wedge block and four axial moving guide bolts. The jacket pile barrel is arranged on the lower portions of the clamping devices. The boosting type pile clamping device has the advantage that each clamping group is provided with a reinforcement wedge block mechanism. Under the condition that the oil cylinders are identical in size, pressure exerted on the surface of a pile is increased by times, and working reliability of the pile clamping device is improved. The oil cylinders are distributed in the axis of the reinforcement pile clamping device, and radial size of the pile clamping device is reduced. A piston rod of the reinforcement pile clamping device exerts force on the pile pipe through the reinforcement structure, the fact in the prior art that the piston rod directly acts on the pile pipe vertically is avoided, the piston rod is stressed vertically, and the working reliability of the oil cylinder is improved. The wedge angle of the wedge block mechanism of the reinforcement pile clamping device is smaller than or equal to 8 degrees, a self-locking function is achieved, and clamping loss caused by inner leakage of the oil cylinders is avoided.