GROUTING METHOD AND GROUTING APPARATUS

摘要

PURPOSE:To strengthen soft ground economically with good strength and durability without causing environmental pollution, by using a destabilized aq. silicic acid soln. as a grouting material obtd. by treating a water-soluble silicate with a cation exchange resin. CONSTITUTION:A water-soluble silicate (e.g. JIS No.3 sodium silicate which is diluted so as to give a destabilized aq. silicic acid soln. having an SiO2 content of 2-10%) in a reservoir 1 is passed through an alkali removing column packed with a cation exchange resin. The resulting destabilized aq. silicic acid soln. [SiO2/Na2O (molar ratio) of 50 or above, pH: 2-10] is fed to a stock soln. reservoir 4 and injected through an injecting pipe 3 into soft ground by means of a grout pump 5.