AIR BARRIER INJECTING SOLIDIFYING CONSTRUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To improve permeability of a grout material by cutting off upward blowout of an injecting grout material to the ground in an injecting solidifying construction method. SOLUTION: The periphery of an injecting outer tube 4 inserted into a boring hole 2 is filled with filling sand 3, grout 17 is blown out of a lower delivery part 18 corresponding to one passage 13 of an inner tube member 7 inserted into the injecting outer tube 4, and at the same time, an air barrier 16 is formed by injecting compressed air from an upper delivery part 5b correponding to the other passage 12 of the inner tube member 7 to thus cut off upward blowout of the blown-out grout 17 to the ground.