EARTH-AND-SAND SOIL IMPROVING METHOD, INJECTION CHEMICAL, AND CONSTRUCTION MANAGEMENT METHOD THERE

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PROBLEM TO BE SOLVED : To provide an injection chemical enabling injection of a large volume of chemicals in a wide area, an earth-and-sand soil improving method using the injection chemical, and a construction management method of simply confirming an improvement effect by measuring an electric specific resistance after chemical injection. SOLUTION : According to the earth-and-sand soil improving method of injecting the injection chemical prepared by blending a principle material of a colloidal solution containing silica particles with a gelatinizer into an earth-and-sand soil, the injection chemical showing pH 1.5-2 is prepared by setting the silica particle concentration of the principle material, a gelatinizing time for bring about a sand gel state, and an electric specific resistance in the sand gel state. This injection chemical is injected into the earth-and-sand soil to improve the earth-and-sand soil into a soil having prescribed liquefaction strength. In improvement work, the electric specific resistance in a soil improvement area is measured to confirm an improvement effect in implementation of the construction management method in a simple manner. COPYRIGHT : (C)2009, JPO&INPIT