PURPOSE: To make improved soil affinitive to a lower layer and a side wall excellently by allowing improved soil to permeate in agrid and enhance a ground improvement effect by wrapping improved soil with a geotextile between the lower layer and an upper layer, in which original-position soil and a solidifying material are mixed and agitated.
CONSTITUTION: A poor subsoil is excavated and a recessed section 2 is formed, the bottom ground of the recessed section 2 is agitated by a bucket mixing system, and cement 6and EPS beads 7 are mixed with original-position soil 5 and an improved-body lower layer 3 is formed. A geotextile sheet 4 is laid on the improved-body lower layer 3, and the side edge section of the sheet 4 is overhung to the outside of the recessed section 2. The excavated original-position soil 5, cement 6 as a solidifying material, the EPS beads 7 and water 8 are mixed by a mixer 9 and the inside of the recessed section 2, in which the sheet 4 is laid, is impregnated with improved soil 10. The peripheral section of the improved soil 10 is wrapped and fixed by the overhung geotextile sheet 4, and an improved-body upper layer is executed. Accordingly, the safety and workability are improved, a ground improving body resists banking and car load, and settlement and side flowing are prevented and the ground improving body can be constructed at a low cost.
HAMATAKE AKIRA
FUKUDA ATSUO
YOSHIDA SHIGERU
KAMI SHUJI
TENOTSUKUSU KYUSHU KK
| JPS63280112A | 1988-11-17 | |||
| JPH04198516A | 1992-07-17 |
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