As it digs the excavation hole where the road widening

摘要

PROBLEM TO BE SOLVED: To provide a grout pipe and a grouting making use thereof in cast-in-place concrete pile capable of surely filling the peripheral ground of a widening section with a grout material in the case the cast-in-place concrete pile is constructed in an excavated hole wherein the widening section is constructed and greatly increasing bearing force and settlement rigidity of the concrete pile.;SOLUTION: In the grout pipe 10 used in the case the cast-in-place concrete pile 20 is constructed by placing a concrete in the excavated hole 11 forming the widening section 11b having an inside diameter larger than the other part in at least one part in the direction of the depth, it has a longitudinal dimension coming at least up to the widening section 11b, it has an eccentric pipe section 14 formed by bending to the direction separated from its axial center in a position facing to the widening section 11b and, at the same time, it is characterized that a grout injection pipe section 16 for the widening section having an injection outlet 17 of the grout material is provided to the eccentric pipe section 14.;COPYRIGHT: (C)2007,JPO&INPIT