EXCAVATOR FOR PILE CONSTRUCTION AND CONSTRUCTION METHOD OF PILE

摘要

PROBLEM TO BE SOLVED: To provide an excavator for pile construction and a construction method of a pile, capable of shortening construction time by efficiently performing excavation work by continuously removing excavation earth.;SOLUTION: The construction time can be shortened by efficiently performing the excavation work, by continuously excavating by an excavation bit 2A of an outside steel pipe 2 and an inside steel pipe 4, by carrying and discharging the excavated excavation earth on the ground by a screw 3B (an earth removal means), by excavating the ground G by the outside steel pipe 2 and the inside steel pipe 4 rotated and pressed in by a driving part. The excavation work can be further sped up by easily removing the earth by the screw 3B by fining a core-like earth mass, by crushing the earth mass taken inside the inside steel pipe 4 by a crushing bit (an inside crushing means) arranged on an inner peripheral surface of the inside steel pipe 4.;COPYRIGHT: (C)2009,JPO&INPIT