Title:
地盤試料のサンプリングシステムおよびこれを用いたサンプリング方法
Document Type and Number:
Japanese Patent JP6666278
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a ground core sampling system allowing a high-quality sampling ground core to be obtained with no need of skill, and a sampling method using the same.SOLUTION: A sampling system of the invention is provided with: pressure means 3 which supplies a tip load to a bit 7 mounted on a lower end of a rod 5 rotatable by a boring device to make the bit to drill the ground; a sampler 6 which is installed at a lower portion of the rod to collect a ground core sample; measuring means 15, 16 to measure the tip load; and control means 20 to control the tip load on the basis of these measured values. The control means 20 in which an upper limit value and a lower limit value of the tip load are preset, adjusts the tip load to enter a range between the upper and lower limit values by controlling the pressing means 3 when the tip load of the bit 7 measured by measuring means 15, 16 exceeds the upper limit value or the lower limit value.SELECTED DRAWING: Figure 2
Inventors:
Masashi Tanikawa
Application Number:
JP2017024009A
Publication Date:
March 13, 2020
Filing Date:
February 13, 2017
Export Citation:
Assignee:
Applied Geology Co., Ltd.
International Classes:
E21B25/00
Domestic Patent References:
| JP2016132874A | ||||
| JP54082803A |
Foreign References:
| US20090078467 |
Attorney, Agent or Firm:
Shigeo Naruse