Title:
杭孔形成装置
Document Type and Number:
Japanese Patent JP7184276
Kind Code:
B2
Abstract:
To provide a pile hole formation device capable of improving accuracy of a measurement value of ground strength.SOLUTION: A pile hole formation device 100 including a plurality of auger rods 10, 20 connected vertically and an auger head 30 at a tip of the tip auger rod 10 forms a pile hole by drilling the ground A using the auger head 30 by rotary driving of the plurality of auger rods 10, 20. The pile hole formation device 100 comprises: a solidification material force-feed pipe 53 vertically extending in a hollow part of the tip auger rod 10; a penetration rod 52 provided in the tip auger rod 10 so as to be vertically movable; a measurement cone 51 connected to a lower end of the penetration rod 52; a hydraulic cylinder 71 that is provided in the tip auger rod 10 and lowers the penetration rod 52 to push out the measurement cone 51 to the outside of the auger head 30 and make the measurement cone penetrate into the ground A; and a three-component sensor 54 that is positioned between the penetration rod 52 and the measurement cone 51 and measures resistance force in making the measurement cone 51 penetrate into the ground A.SELECTED DRAWING: Figure 3
Inventors:
Tomoaki Shimizu
Toshiyuki Ishii
Takashi Misawa
Tsukamoto Koji
Shiraishi Yuaki
Kodera Mitsuru
Shintaro Oka
Yuichi Goto
Toshiyuki Ishii
Takashi Misawa
Tsukamoto Koji
Shiraishi Yuaki
Kodera Mitsuru
Shintaro Oka
Yuichi Goto
Application Number:
JP2018187415A
Publication Date:
December 06, 2022
Filing Date:
October 02, 2018
Export Citation:
Assignee:
Okumura Gumi Co., Ltd.
Nippon Concrete Industry Co., Ltd.
Geotechnical Laboratory Co., Ltd.
Sato Iron Works Co., Ltd.
Nippon Concrete Industry Co., Ltd.
Geotechnical Laboratory Co., Ltd.
Sato Iron Works Co., Ltd.
International Classes:
E21B7/00; E02D1/02; E02D3/12; E21B10/32
Domestic Patent References:
| JP2000054778A | ||||
| JP10183591A | ||||
| JP2017160714A | ||||
| JP49069206U | ||||
| JP55016990Y2 |
Foreign References:
| EP2385175A2 |
Attorney, Agent or Firm:
Creation International Patent Office