PURPOSE: To obtain a guide pipe used to intrude a compaction pile to increase a top end holding power into the top end ground (hole bottom ground) in a structure of a buried pile and others using a cast-in-place concrete pile, a continuous underground Wall or a conventional concrete pile.
CONSTITUTION: A soil overturning plate 10 to shield the top end opening part of a guide pipe 4 which consists of a steel pipe having its inside diameter slightly larger than the outside diameter of a compaction pile 6 and having its length more than the same of the depth of a pile hole and others is installed. This soil overturning plate 10 is provided with a through hole 11 of the roughly same diameter as the top end diameter of the compaction pile 6 on its central part, and a plural number of cut grooves 9 are formed and arranged radially from the central part. The soil overturning plate 10 is constituted free to break along the cut grooves 9 by the compaction pile 6. Consequently, it is possible to work easily and well in workability without being interrupted by drilling mud in the hole in building work of the guide pipe or a conventional pile. It is possible to prevent soil discharged at the time of intrusion of the compaction pile 6 from intruding into the guide pipe and the conventional pile.
KAKURAI MASAAKI
TSUCHIYA TOMIO
KURITA YOSHIHIKO
IKUTA YUKO
FUKUHARA TAKUHEI
TAKENAKA DOBOKU