GROUT INJECTION MECHANISM IN CAST-IN-PLACE CONCRETE PILE AND GROUT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a grout injection mechanism capable of positioning a grout jetting port inside a wide width part by a simple operation and substantially reducing the time and labor required for work.;SOLUTION: The grout injection mechanism, for injecting grout to a sidewall of the wide width part when constructing a cast-in-place concrete pile inside a drilling hole 14 where a wide width part 14b is formed, includes: an operation shaft 10 suspended inside a pile reinforcement 13 freely movably in the vertical direction or freely rotatably around an axis; a plurality of spoke members 11 whose proximal end part is connected freely swingably to the operation shaft or a pile main reinforcement and distal end part 11a is positioned inside the drilling hole when building the pile reinforcement and extended in an outer peripheral direction to face the sidewall of the wide width part by operating the operation shaft after the pile reinforcement is arranged; a flexible grout pipe 12 suspended inside the drilling hole; and a protective member 18 of a grout jetting port 17 provided on a position facing the wide width part of the grout pipe. To the protective member, the distal end part of the spoke member is connected.;COPYRIGHT: (C)2012,JPO&INPIT