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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

Inventors:
FUJISAKI KATSUTOSHI
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:
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Assignee:
KAJIMA CORP
International Classes:
E02D3/12; E02D5/24; E02D5/34; E02D7/00; E21B7/00
Domestic Patent References:
JP3941045B22007-07-04
JPH0730551B21995-04-05
JP2007255064A2007-10-04
JPS5876607A1983-05-09
JPH11336073A1999-12-07
JP2005139767A2005-06-02
JP2015001121A2015-01-05
JP2011226161A2011-11-10
JP2000303452A2000-10-31
JP2005281974A2005-10-13
JP2010106543A2010-05-13
JP2013108299A2013-06-06
JP2019019647A2019-02-07
Attorney, Agent or Firm:
Seiichi Inoue