SYSTEM FOR MULTI-STAGE DOWNWARD PRESSURE-INJECTION

摘要

Disclosed is a multi-stage downward pressure injecting system that carries out ground-reinforcing work around a free surface and completes the ground-reinforcing work at the final excavation depth. The multi-stage downward pressure injecting system that drills a drilled hole and introduces an introduction material into the hole so as to modify and reinforce the ground includes a reinforcing material introduced in the drill hole and having a check valve on the outer peripheral surface; partitions arranged at regular intervals in the reinforcing material to form a plurality of walls in the reinforcing material; a plurality of introducing pipes connected to the partitions; a spacing material interposed between the reinforcing material and the drilled hole to maintain an interval between the reinforcing material and the drilled hole; a calking material for calking an interval between an inlet port of the reinforcing material and the drilled hole; a cap for closing the inlet port of the reinforcing material; and a finishing material for closing an outlet port of the reinforcing material.