PILE HOLE EXCAVATION METHOD AND DEVICE IN BORING METHOD OF PILE HOLE

摘要

PURPOSE: To prevent an excavator from overloading caused by clogging of a spiral auger of an excavation rod with excavated earth in a boring method of a pile hole and to move earth efficiently. ;CONSTITUTION: Excavation blades 3 and 3 are mounted at the front end of a rotary shaft 1, and a spiral auger 4 is provided in the middle part thereof. A specific number of air-supply pipes 6 and 6 having a specific length are mounted on the outside of the rotary shaft 1 by passing through the spiral auger 4 along the rotary shaft 1. Air outlets 7 are respectively mounted at the lower ends of the air-supply pipes 6 in a state to turn them slightly upward of the horizontal level to form a pile hole excavator 9.;COPYRIGHT: (C)1993,JPO&Japio