| 摘要 |
PROBLEM TO BE SOLVED: To provide a soil improvement device having a spreading excavating blade capable of eliminating the need of a special external force for operating a spreading blade and holding the state of the spreading blade, having excellent economic efficiency, and capable of preventing a solidifying liquid outlet of a rod body from being clogged with excavated soil and a method of constructing a reinforcement body with a core capable of constructing an improved soil body of an enlarged diameter in soil by discharging a solidifying liquid at intermediate pressure by using the device, and having high economic efficiency. SOLUTION: This soil improvement device comprises a spreading excavating blade having a base end pin-connected to near the tip of the rod body so as to be spread, an outer peripheral tube member inserted to the rod body at the rear of the excavating blade so as to be advanced and retreated, an operating link having one end pin-connected to the intermediate part of the spreading excavating blade and having the other end pin-connected to the tip of an outer peripheral tube member, and spreading the spreading excavating blade according to the advancement and retreat of the outer peripheral tube member, and a spreading control mechanism spreading the spreading excavating blade by advancing the outer peripheral tube member in a tip direction by rotating the rod body in one direction and contracting the spreading excavating blade by retreating the outer peripheral tube member by rotating the rod body in the other direction. COPYRIGHT: (C)2006,JPO&NCIPI
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