INJECTING METHOD FOR FILLING MATERIAL BY USE OF ANCHOR

PURPOSE:To facilitate assembling work and filling work by locating a high leakage bag around the outer peripheral part of an anchor as a packer and forming a spare chamber with a low leakage sheet on the both ends of the packer in the outer peripheral part of the anchor. CONSTITUTION:Before an anchor 1 is inserted, a ground is excavated in a preceding way and then the anchor 1 mounted with a packer 2 is inserted into the excavated hole where a filling material is injected into the packer 2 by way of an expansion pipe 21. A cylindrical part of the packer 2 comes into contact with a hole wall so that the filling material is discharged outside to a satisfactory extent, thereby obtaining favorable adhesion and penetrating the surrounding rock cracks and shielding a space between the inner wall of the excavated hole and the anchor 1. Then, the filling material is injected into a spare chamber 3 on both ends of the packer 2, thereby checking the leakage of the filling material from the packer 2 in the longitudinal direction of the anchor 1. Then, the filling material is injected into the foremost depth of the hole from the rear end of a hollow passage of the anchor by way of its hollow passage.