| 摘要 |
A ground reinforcement method by pressured multi-step grouting is provided to grout an insertion hole and the surrounding ground by sealing up an insertion hole with packing members by stages by releasing the elasticity of elastic pieces installed on the outside of a reinforcing pipe. The ground reinforcement method by pressured multi-step grouting comprises the steps of perforating an insertion hole(H) on the ground to insert a reinforcing pipe, inserting a reinforcing pipe(10) attached with many packing members(30) and provided with a through hole(11) to the outer circumferential surface, sealing up the insertion hole with the packing members in multi-step by releasing the elasticity of many elastic pieces(20) installed on the outer circumferential surface of the reinforcing pipe at regular intervals, inserting an injection hose attached with a packer into the reinforcing pipe, and pressurizing and injecting grout materials through the injection hose to be discharged to the through hole of the reinforcing pipe to fill up the injection hole partitioned by many packing members in order and to be permeated to a joint or a fracture zone of the surrounding ground.
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