| 摘要 |
PURPOSE:To prevent an alkali from oozing after injection into soil, by injecting a portland cement slurry and silica sol into the ground. CONSTITUTION:Portland cement slurry (A) consisting of a cement and water in a wt. ratio of 1:1-4 and a silica sol (B) consisting of a silica sol and water in a wt. ratio of 1:0-3 are injected in a proportion such as to provide an ultimate ratio of SiO2 in the cement to SiO2 in the silica sol of 1:0.06-0.5 into the ground in 1.5 or 2 shots, to coagulate the ground. EFFECT:It is possible to prevent an alkali such as Na2O from oozing out of water glass after injection into soil and to stably reinforce the ground for a long period of time. |
