Title:
CONSTRUCTION METHOD OF CAST-IN-PLACE CONCRETE PILE
Document Type and Number:
Japanese Patent JP2019183496
Kind Code:
A
Abstract:
To provide a construction method of cast-in-place concrete pile capable of more efficiently and effectively improving the bearing strength than conventional ones.SOLUTION: The construction method of cast-in-place concrete pile includes the steps of: performing advanced excavation to a predetermined depth of the ground using the excavator for piles to form an excavation hole 10 of the shaft part 2; inserting a bottom expansion excavator 5 for the shaft portion having a smaller diameter than the drilling hole 10 of the shaft part 2 into the front end of the drilling hole 10 in the shaft part 2; holding a rod 4 and/or a guide part of the bottom expansion excavator 5, which is rotatably connected to the bottom expansion excavator 5 by the eccentric positioning and holding means 8 disposed inside the excavation hole 10 of the shaft part 2 in a decentered state by a predetermined amount; and forming an excavation hole 11 in a bottom expanded part 3 by expanding the hole wall of the tip edge of the drilling hole 10 of the shaft part 2 formed by the preceding excavation by the bottom expansion excavator 5.SELECTED DRAWING: Figure 1
Inventors:
MANO HIDEYUKI
Application Number:
JP2018075063A
Publication Date:
October 24, 2019
Filing Date:
April 09, 2018
Export Citation:
Assignee:
SHIMIZU CONSTRUCTION CO LTD
International Classes:
E02D5/48
Domestic Patent References:
| JP2010255212A | 2010-11-11 | |||
| JPH04228797A | 1992-08-18 | |||
| JP2017218810A | 2017-12-14 | |||
| JP2006307593A | 2006-11-09 | |||
| JPH10184260A | 1998-07-14 | |||
| JP2004211492A | 2004-07-29 | |||
| JP2014141844A | 2014-08-07 | |||
| JPS63156288U | 1988-10-13 |
Attorney, Agent or Firm:
Yasushi Matsunuma
Kenichi Kawabuchi
Nishizawa Kazumi
Kenichi Kawabuchi
Nishizawa Kazumi