DRILLING AND INJECTION ROD FOR PILE CONSTRUCTION, AND PILE CONSTRUCTION METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a drilling and injection rod for pile construction and a pile construction method using the same that enable efficient pile construction in a short period of time without requiring a heavy and large mechanism and while preventing collapse of a hole wall.;SOLUTION: A drilling and injection rod 1 for pile construction has a plurality of pipe materials connected in a longitudinal direction, the pipe materials being for drilling a pile hole in a ground and injecting a solidification material. The drilling and injection rod includes a drilling rod 2 having a drilling bit and a spiral-form screw at a tip for drilling a ground, and one or a plurality of connecting injection rods 3 connected to a rear edge of the drilling rod 2 for having slurry of the solidification material pass therethrough. The connecting injection rod 3 has a cross-section orthogonal to a pipe axis of a polygonal external form with curved corner parts, the polygonal cross-section having a largest diameter almost equal to a diameter of the screw of the drilling rod 2.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2017,JPO&INPIT