METHOD OF FLUIDIZATION PREVENTIVE CONSTRUCTION OF SAND GROUP

摘要

PURPOSE:To obtain the method of the fluidization preventive construction of a sand ground, by which vibrations, noises, cost, etc., are reduced. CONSTITUTION:A drain pipe 1 reaching a sandy soil layer A is installed to the ground, and an underground level is lowered by pumping up water in the sandy soil layer by the drain pipe 1 and an overconsolidation ratio is increased. Since the effective load of the sandy soil layer is increased by pumping up water in the sandy soil layer and lowering the underground level, the overconsolidation ratio is augmented, thus improving fluidization strength. Accordingly, fluidization strength can be increased only by temporarily lowering the underground level, thus solving trouble such as vibrations, noises, an increase in cost, etc., in each method of construction at a stroke.