METHOD FOR CONFIRMING MIXED STATE OF GROUND IMPROVEMENT BODY: Fid-Bau Portal

METHOD FOR CONFIRMING MIXED STATE OF GROUND IMPROVEMENT BODY

USUI HIROFUMI

To provide a method for accurately confirming an agitation mixing situation of a ground improvement body in parallel with agitation mixing in real time.SOLUTION: A method includes: a first step of preparing a cement slurry to which a water-soluble fluorescent dye is added; a second step of discharging the cement slurry from the root of an excavation blade, excavating and mixing the discharged cement slurry and peripheral sediment, and constructing an uncured ground improvement body; a third step of irradiating the ground improvement body with black light, at a depth where the excavation blade is positioned in the uncured ground improvement body from a light source provided on the excavation blade; and a fourth step of measuring the reflection light of the black light, at the depth where the excavation blade is positioned in the uncured ground improvement body, with a measuring instrument provided in the excavation blade.SELECTED DRAWING: Figure 7

【課題】地盤改良体の撹拌混合状況を、撹拌混合と並行してリアルタイムで正確に確認できる方法を提供する。【解決手段】本方法は、水溶性蛍光染料が添加されたセメントスラリーを用意する第１工程と、セメントスラリーを掘削翼の根元から吐出し、吐出されたセメントスラリーと周囲の土砂とを掘削混合し、未硬化の地盤改良体を構築する第２工程と、掘削翼に設けた光源から未硬化の地盤改良体内であって掘削翼が位置する深さにおいて、地盤改良体にブラックライトを照射する第３工程と、掘削翼に設けた計測器で未硬化の地盤改良体内であって掘削翼が位置する深さにおいて、ブラックライトの反射光を計測する第４工程とを含む。【選択図】図７

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