FOUNDATION PILE CONSTRUCTION METHOD ON GROUND CONTAINING CONTAMINATED SOIL LAYER

Title:

FOUNDATION PILE CONSTRUCTION METHOD ON GROUND CONTAINING CONTAMINATED SOIL LAYER

Document Type and Number:

Japanese Patent JP2019082040

Kind Code:

A

Abstract:

To make safe and efficient the pile hole drilling on the ground with contaminated soil layers.SOLUTION: A drilling head 5 of a drilling rod 1 drills until it penetrates a contaminated soil layer 12 of thickness H0, and while an end face 12a (pile hole wall) of the contaminated soil layer 12 is kneaded and the mud is kneaded with a drum 2 to form a film on the end face 12a (b,c), it drills on to the middle of the impermeable layer 13(H0+α.d). When the drilling is completed up to this point, the drilling rod 1 is once pulled up to the ground to form the upper pile hole 21 (e). The excavated soil 35 in which contaminated soil of the upper pile hole 21 is contained is discharged to the sump pit 36, and the insolubilized cement is mixed into the excavated soil 35 to perform insolubilization treatment and safely discharged. Subsequently, the drilling rod 1 drills again pile holes from the bottom 21a of the upper pile hole 21, and it drills from the ground 1 to the support layer 15 at the depth of H1 and a pre-made pile is embedded in the pile hole and the foundation pile is constructed.SELECTED DRAWING: Figure 1

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Inventors:

ASANO TATSUMI

Application Number:

JP2017209535A

Publication Date:

May 30, 2019

Filing Date:

October 30, 2017

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