| 摘要 |
PURPOSE:To make construction management easier by a method in which a chemical grout composed of sodium silicate and glyoxal in specific amounts is injected from one flow path ino the ground and a chemical grout containing an alkali hydrogen carbonate is injected from the other flow path into the ground. CONSTITUTION:A chemical grout-A composed of 20-40 liter/100 liter sodium silicate containing 0.3-0.6 equivalent/1 equivalent of sodium silicate of one or more compounds selected from glyoxal, ethylene carbonate, propylene carbonate, and ethyleneglycol diacetate is prepared. Also, a chemical grout-B containing 10kg or more alkali hydrogen carbonate per 100 liter is prepared. The chemical grout-A is injected from one path of an injection pipe into the ground, and the chemical grout-B in an amount corresponding to 30-50vol.% of the chemical grout-A is joined with the grout-A inside or outside of the pipe and injected into the ground intermittently. |
