Packer movement mechanism and ground reinforcement method

Abstract

To reliably fix a ground reinforcing pipe to the ground with a fixing material by eliminating leakage of the fixing material from a hole drilled in the ground with excellent construction efficiency.SOLUTION: A packer movement mechanism 1 comprises a ground reinforcement pipe 2 provided with a hollow portion 21 for injecting a fixing material therein, a guide body 3 comprising a front side guide pipe portion 31 and a rear side guide pipe portion 32 which are arranged at intervals in the axial direction of the ground reinforcement pipe, and externally inserted with a clearance provided on the outer circumference of the ground reinforcement pipe 2, an inflatable packer 4 that spans the front side guide pipe portion 31 and the rear side guide pipe portion 32 and is provided so as to cover the ground reinforcement pipe 2, an injection hose 5 fixed to at least the rear side guide pipe portion 32 and for injecting the injection material M1 into the packer 4. The guide body 3 moves according to the movement of the injection hose 5 in the axial direction of the ground reinforcement pipe 2.SELECTED DRAWING: Figure 1