Title:
METHOD FOR CONSTRUCTING GROUND IMPROVEMENT BODY AND METHOD FOR CONSTRUCTING PILE
Document Type and Number:
Japanese Patent JP2019039140
Kind Code:
A
Abstract:
To provide a method for constructing a ground improvement body and a method for constructing a pile, which can ensure the stability of a hole wall and shut off groundwater, and can be rationally constructed with a small number of steps.SOLUTION: First, a cylindrical ground improvement body 27 is constructed in a range from a design improvement depth 23 in the non-contaminated ground 1 to the ground surface. After drilling a drilling rod 11 with a stirring blade 13 to the non-contaminated ground 1, the drilling rod 11 is rotated and pulled up to construct the ground improvement body 27 while injecting the cement milk and the compressed air from a solidifying material nozzle provided near a tip of the stirring blade 13-1. Then, unmodified ground 45 inside the ground improvement body 27 is drilled to form a space. Next, a prefabricated pile made of concrete or steel is driven in a pile construction planned area located inside the cylindrical ground improvement body 27 in plan view. Thereafter, a cement-based material is filled between the ground improvement body 27 and the prefabricated pile.SELECTED DRAWING: Figure 1
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| WO/1992/021825 | CONSTRUCTION METHOD OF IMPROVING OR STRENGTHENING GROUND |
Inventors:
FUJISAKI KATSUTOSHI
AKIYAMA SADAYUKI
TANAKA HIDEO
SAKAMOTO MAMORU
ITO TAKU
MIKI KOJI
TSUCHIYA TSUTOMU
YOSHIDA TATSUO
ABE HIROYUKI
AKIYAMA SADAYUKI
TANAKA HIDEO
SAKAMOTO MAMORU
ITO TAKU
MIKI KOJI
TSUCHIYA TSUTOMU
YOSHIDA TATSUO
ABE HIROYUKI
Application Number:
JP2017159246A
Publication Date:
March 14, 2019
Filing Date:
August 22, 2017
Export Citation:
Assignee:
KAJIMA CORP
International Classes:
E02D3/12; E02D5/24; E02D5/34; E02D7/00; E21B7/00
Domestic Patent References:
| JP3941045B2 | 2007-07-04 | |||
| JPH0730551B2 | 1995-04-05 | |||
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| JP2015001121A | 2015-01-05 | |||
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| JP2019019647A | 2019-02-07 |
Attorney, Agent or Firm:
Seiichi Inoue