DRAWING WORK OF EXISTING PILE AND DRAWER THEREFOR

摘要

PURPOSE:To lessen the resistance of drawing by a method in which a cylindrical casing having an inside diameter larger than a pile is penetrated into the ground by injecting jet water toward the surface of the pile below the casing. CONSTITUTION:An edge cutter 5 is held on a vibro-hammer supported on a crane. A sheet pile 7 is connected to the cylindrical casing 6 of the cutter 5, and plural downwardly turned nozzles 8 and inward and downwardly turned nozzles 9 are set on the periphery of the casing 6 and connected to a jet water supply tube 10. Jet water is jetted from the nozzles 8 and 9 while vibrating the hammer, and the casing 6 is penetrated into the ground. The penetrating resistance of the casing 6 can be reduced by the water from the nozzles 8 and the pile 3 and the ground can be cut by the water from the nozzles 9. The drawing resistance of the pile 3 can thus be reduced.