BUILD-UP DEVICE OF PIPE IN GROUND AND GROUND IMPROVING METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a building up device preventing the breakdown of the wall of an insertion hole, improving execution efficiency for the buildup of an outer pipe into an insertion hole.;SOLUTION: The device is provided with a double-tube composed of an internal tube and an external tube, and excavates the ground while feeding drilling water from the front end side of the internal tube 5 to and form an insertion hole H, On the other hand, the external tube 2 is inserted in the insertion hole H formed in sequence, the external tube 2 is built up in the ground by the device. On the outer peripheral face of the external tube 2, intake openings 28A, 28A, ... taking mud water in the insertion hole H into the external tube 2 are formed, and at the base end of the external tube 2, a discharge opening 29A discharging the mud water is formed.;COPYRIGHT: (C)2006,JPO&NCIPI