Resonance-free and full-bush long spiral drilling machine and construction method

The invention discloses a resonance-free and full-bush long spiral drilling machine which comprises a pile frame system and drilling system. The pile frame system comprises a traveling mechanism, a chassis, a diagonal brace, a standing column, a polished rod and a top pulley set, wherein the chassis is fixed above the traveling mechanism, the diagonal brace and the standing column are fixed on the chassis, the top pulley set is fixed at the top of the standing column, and the polished rod is parallel with the standing column and is fixed on the chassis. The drilling system comprises an upper power head, a spiral drilling pipe, a vibration hammer, a clamping device and a bush, wherein the upper power head is connected with the spiral drilling pipe, and the upper power head is fixed on the polished rod through a linear bearing; the lower portion of the vibration hammer is connected with the clamping device, the clamping device is connected with the upper end of the bush, and the bush and the spiral drilling pipe are coaxial. The invention furthers provides a pile-driving construction method. The long spiral drilling machine and the construction method have the advantages that the long spiral drilling machine is safe, environmental friendly and efficient in construction, and the problem of potential quality hazard in long spiral drilling machine construction is solved, limitation of pile driving to construction environments is reduced at the same time, and efficient construction can be performed on bottom layers such as loose soft stone layers and sand layers which are easy in hole collapse.