GROUT INJECTION FOR CUT-OFF WALL CONSTRUCTION WORK

摘要

PURPOSE:To exactly inject a grout into the ground by a method in which a grout injection tube consisting of an outer tube and an inner tube inserted into the outer tube in such a way as to close the tip of the outer tube is provided to a steel material, and the grout is discharged from the aperture formed between the outer tube and the inner tube when pulling up the outer tube. CONSTITUTION:A pair of grout injection tubes 18 are attached on the diagonal line to the outside of the basal portion 12 of a steel material 10. The steel material 10 is then penetrated into the ground. A stopper 30 is moved upwards, an outer tube 22 is pulled up, and a grout is supplied through the charging port 34 of the outer tube 22. The steel material 10 is then pulled out, and the grout is flowed down in the tube 22 and injected into the ground through an aperture 32 formed between the outer tube 22 and the inner tube 20.