Chemical grouting structures in the ground at the time of the chemical liquid grouting and chemical grouting

摘要

To provide a liquid injection structure of liquid injection method and in the soil at the time of drug solution injection can be used to inject the drug solution depending on the depth of the ground. A liquid injection method is a boring step of forming the hole H by penetrating the casing pipe 10 in the ground G, and the hole H, the liquid injector tube 20 having a plurality of discharge ports 21 of the chemical and the chemical liquid provided around the injection tube 20, provided with a laminate 30 formed alternately in the vertical direction of the hole H and the permeable layer 32 which enables the permeability of the impermeable layer 31 and the chemical solution to prevent the permeability of the drug solution, the casing includes a stack forming step of pulling the pipe 10, to discharge the liquid medicine from a plurality of discharge ports 21, and a liquid injection step of injecting the drug solution into the ground G through a permeable layer 32. Impermeable layer 31 may be formed of a material containing solid bentonite, permeable layer 32, and sand material containing at least one of gravel, foam, or is formed by the cavity. [Selection Figure] Figure 1