| 摘要 |
PURPOSE:To prevent the water leakage of a permeating grout and consolidate a region with certainty, by supplying an aqueous solution of water glass and an aqueous solution of a reactant respectively, injecting the joined alkaline water glass grout, and injecting an acidic water glass grout to form a packer. CONSTITUTION:An aqueous solution of a reactant is supplied from a pipeline (I) of an injection pipe inserted in the ground, and an aqueous solution of water glass is then supplied from a pipeline (II). The solutions are joined at the tip and gelatinized, preferably within 30sec. An alkaline water glass grout at >=8pH capable of gelling on joining to them at the tip is injected to form a packer by an instantaneously hardenable consolidated material around the injection pipe. A network structure is formed around the packer to strengthen the ground. An injection region (D) is changed into a restricted state, and an acidic water glass grout at <=5pH, having a high permeating property, preferably prepared by adding water glass and if necessary a gelation adjusting agent to an acidic solution, and having >=30min gelling time in injected from the pipeline (I), permeated between the soil particles to strengthen an injection region (E) and impart the watertightness thereto. EFFECT:The mutual neutralization maintains the consolidated ground neutral and has improved maintenance of water quality. |
