PROBLEM TO BE SOLVED: To provide an effective and proper soil improving method which can bring about an excellent improvement effect even at a low improvement rate by improving a static compaction effect brought about by a plastic gel.;SOLUTION: A ground material composed of the plastic gel is statically pressurized and injected into the ground to be improved, so that the original ground can be peripherally pushed open to become solid and an improved body can be formed by the solidification of the grout material. In that case, many improved piles are formed by being disposed in a state that peripheral surfaces of them are brought at least into contact with one another, so that the integral improved body can be formed of all the improved piles. A wall-shaped improved wall 10 or an improved block in a lattice shape in a plan view is suitably used as the improved body.;COPYRIGHT: (C)2009,JPO&INPIT
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