Title:
VERTICAL DIRECTIONAL WATER PERMEABILITY TESTING DEVICE OF ORIGINAL POSITION GROUND
Document Type and Number:
Japanese Patent JP3772884
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a vertical directional water permeability testing device of the original position ground capable of testing water permeability by a steady method.
SOLUTION: This vertical directional water permeability testing device of the original position ground having a constitution, is composed of an outer pipe rotated for excavating the ground, an outer pipe rod, an intermediate pipe stored inside the outer pipe in a nonrotatable state and taking in an undisturbed sample, an intermediate pipe rod, and an inner pipe arranged along an inner peripheral surface of the intermediate pipe and freely expanding or contracting for blocking up a waterway between the undisturbed sample taken in the intermediate pipe and the intermediate pipe. The device has a storage pump arranged inside the intermediate pipe rod, and a water pressure gauge arranged in upper and lower positions of the intermediate pipe, and also includes a means for expanding the inner pipe, and a data processing means. The water pressure gauge 1 is arranged in the intermediate pipe rod 15 for automatically controlling driving and stopping of the storage pump 17 by measuring a water level in a hole by water pressure. The water pressure gauge 1 and the storage pump 17 are connected by an automatic control system 3.
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Inventors:
Kazuyuki Inui
Tomohide Oshita
Masaji Aoki
Takaaki Shimizu
Kunimitsu Mori
Takenaka Yasuaki
Naoshi Ito
Tadashi Yoshida
Tomohide Oshita
Masaji Aoki
Takaaki Shimizu
Kunimitsu Mori
Takenaka Yasuaki
Naoshi Ito
Tadashi Yoshida
Application Number:
JP2003392419A
Publication Date:
May 10, 2006
Filing Date:
November 21, 2003
Export Citation:
Assignee:
TAKENAKA CORPORATION
Tokyo Soil Research Co., Ltd.
Tokyo Soil Research Co., Ltd.
International Classes:
E02D1/02; E21B33/12; (IPC1-7): E02D1/02; E21B33/12
Domestic Patent References:
| JP2003321827A | ||||
| JP2000009631A | ||||
| JP3081492A |
Attorney, Agent or Firm:
Masahiko Yamana
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