Title:
標準貫入試験装置、及び標準貫入試験方法
Document Type and Number:
Japanese Patent JP7472732
Kind Code:
B2
Abstract:
To provide a technique, which is based on an unprecedented idea, for drilling a test hole by applying hits to a rod with a hammer while further rotating and press-fitting the rod.SOLUTION: A standard penetration test apparatus of the present invention includes a support, an elevating body, a hammer, a knocking head, a rod, and rotating means. Of these, the rotating means is means for rotating the rod while gripping the rod in an insertion hole. The ground is drilled with the drilling bit by rotating the drilling rod by the rotating means while transmitting the force for moving the elevating body downward to the rotating means, and by dropping the hammer to hit the knocking head.SELECTED DRAWING: Figure 1
Inventors:
Naoaki Kawamura
Hiroyuki Takeishi
Hirotaka Haji
Hiroyuki Takeishi
Hirotaka Haji
Application Number:
JP2020154294A
Publication Date:
April 23, 2024
Filing Date:
September 15, 2020
Export Citation:
Assignee:
TEPCO Holdings Co., Ltd.
International Classes:
E02D1/02
Domestic Patent References:
| JP2013224516A | ||||
| JP2014234629A | ||||
| JP2013144921A | ||||
| JP2011190657A | ||||
| JP3086397U | ||||
| JP11173057A | ||||
| JP7331979A |
Attorney, Agent or Firm:
Patent Attorney Corporation Takemasa International Patent and Trademark Office
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