STABILIZATION OF GROUND

PURPOSE:To stabilize the ground without causing environmental pollution, safety problem, the corrosion of equipment, etc., by injecting an aqueous mixture composed of an alkali bicarbonate, an alkaline earth metal mineral acid salt, an alkali mineral acid salt, and an alkali silicate into the ground and allowing the mixture to gel and solidify within a period of the order of a second. CONSTITUTION:An aqueous mixture, composed of an alkali (e.g., Na) bicarbonate (A), an alkaline earty metal mineral acid salt (e.g., MgCl2) (B), an alkali mineral acid salt (e.g., NaCl) (C), and an alkali silicate (D) in such a proportion that the total sum of alkaline earth metal of component (B) and the alkali metal of component (C) is 10-150mol on the bases of 100mol of the alkali metal of component (A), the mol ratio of the alkaline earth metal of component (B) to that of component (C) is 1:1-1:2, and total mol number of metals inclusive of ammonium in components (A), (B), and (C) of 10-200mol on the basis of 100mol of anhydrous silicic acid in the alkali silicate (D), is injected into the ground to cause it to be gelled. Thus, the ground can be stabilized.