VERTICAL DIRECTION WATER PERMEABILITY TEST DEVICE OF IN-SITU GROUND

Japanese Patent JP3772877

B2

PROBLEM TO BE SOLVED: To provide a water permeability test device measuring the coefficient of water permeability in the vertical direction of an in-situ ground by unagitated samples.
SOLUTION: In a vertical direction water permeability test device of the in-situ ground consisting of an outer pipe rotated for excavating the ground, an outer pipe rod, an inner pipe stored inside of the outer pipe, a middle pipe rod and the inner pipe installed along the inside circumferential surface of the middle pipe, equipped with a lifting pump provided to the inside of the middle pipe rod and pressure sensors provided to both up and down positions of the middle pipe and constituted by including a means expanding the inner pipe and a data processing means, a cylindrical friction reduction film reducing frictional force between the unagitated samples required to be incorporated along the inside surface of the inner pipe is placed in an adhered state, the upper end section of the friction reduction film is stopped to a position near the upper end section in the middle pipe, the lower end section is stopped to a position near the lower end section in the middle pipe, and it is so constituted that the unagitated samples can be incorporated inside of the cylindrical friction film.

Tomohide Oshita
Masaji Aoki
Takaaki Shimizu
Kunimitsu Mori
Kazuyuki Inui
Takenaka Yasuaki
Naoshi Ito
Tadashi Yoshida

JP2003374748A

May 10, 2006

November 04, 2003

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TAKENAKA CORPORATION
Tokyo Soil Research Co., Ltd.

E02D1/00; E21B49/00; E21B17/00; (IPC1-7): E02D1/00; E21B17/00; E21B49/00

JP3081492A
JP1131432A

Masahiko Yamana

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