BORING DEVICE, BORING METHOD, AND CONSTRUCTION METHOD OF PILE

摘要

PROBLEM TO BE SOLVED: To provide a lightweight/compact boring device applicable to every geology containing obstacles such as steel and capable of ensuring construction accuracy more than a conventional one, and to provide a boring method and a construction method of a pile. SOLUTION: The boring device for boring the ground while feeding bubbles 4a into a boring tube 1 comprises a driving means 2 for rotating the boring tube around its axis; a lifting means 3 for vertically moving the boring tube in its axial direction; a bubble feeding means 4 for feeding bubbles into the boring tube; and a pressure control means 5 for controlling pressure in the boring tube with the bubbles. The boring tube comprises a single casing tube 11 rotated by the driving means, and a diamond bit 7 provided at the tip part of the single casing tube. COPYRIGHT: (C)2008,JPO&INPIT