| 摘要 |
PURPOSE:To form integrated strong ground by a method in which a grout having a poor permeability is first injected and then a water-glass grout having good permeability is injected. CONSTITUTION:The ground is excavated to a given depth by sending boring water from the lower outlet 4 of an inner tube 2. A grout having a poor permeability is injected from an outer tube 1 and then a non-cement reactant-mixed liquid is injected from the upper outlet 3 into the ground. A water glass grout having good permeability, whose pH value is regulated to 9 or move, is then injected from the lower outlet 4 through the inner tube 2 into the ground. The escape of the water glass grout to the outside of the injection range can be prevented, and therefore, uniform ground having excellent durability can be formed.
|
