| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved ground preparation method without causing unequal settlement while reducing cost. SOLUTION: This preparation method prepares the ground by this bubble mixed earth by manufacturing the fluid bubble mixed earth by agitating and mixing three members of present position earth, cement being a solidifying material and bubbles being a void forming material in a present position. An improved ground preparation body 38 is prepared by its bubble mixed earth so that the area of an improved earth layer 7 occupied by the bubble mixed earth overflowing from a corresponding place while including the area of its improved column body 1 becomes larger than the area of an improved column body 1 corresponding part for applying agitating mixing processing for manufacturing the bubble mixed earth. In this case, the improved ground preparation body is prepared so that a vertical cross-sectional shape of the single improved ground preparation body 38 becomes a substantially T shape. COPYRIGHT: (C)2007,JPO&INPIT
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