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Title:
CONSTRUCTION METHOD FOR KNOTTED CAST-IN-PLACE CONCRETE-BASED PILE, AND STEEL PIPE FITTED WITH EXCAVATING BLADE
Document Type and Number:
Japanese Patent JP2014062446
Kind Code:
A
Abstract:

To provide a construction method for a knotted cast-in-place concrete-based pile, capable of constructing a concrete-based pile having a stable quality for ground reinforcement without being affected by the state of earth at a site, with the constructed concrete-based pile having a large pile peripheral surface resistance.

A construction method for a knotted cast-in-place concrete-based pile includes the steps of: preparing a steel pipe 10 fitted with an excavating blade 12, the tip excavating blade 12 being detachably fitted at the lower end of the steel pile; inserting the steel pipe 10 fitted with the excavating blade 12 into a ground 15 while excavating earth downward with the tip excavating blade 12 and forming a spiral groove in earth on the outer peripheral surface of a steel pipe 11 by rotating the steel pipe 10 fitted with the excavating blade 12 around the central axis of the steel pipe 11 and pushing down in a specified direction; filling the inside of the steel pile 11 with mortar or ready mixed concrete; and pulling out only the steel pipe 11 from the ground 15 and pouring the mortar or ready mixed concrete in the steel pipe 11 into a pile hole 17, which is a pull-out trace of the steel pipe 11, and the spiral groove 16. The tip excavating blade 12 may be storable in the steel pipe 11 instead of being detachable.


Inventors:
ICHIMURA HITOSHI
SUGA MASANORI
TAKAHASHI SHUICHI
Application Number:
JP2013068225A
Publication Date:
April 10, 2014
Filing Date:
March 28, 2013
Export Citation:
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Assignee:
DAIWA HOUSE IND
International Classes:
E02D5/34
Domestic Patent References:
JPH0420613A1992-01-24
JP2006057404A2006-03-02
JPS6383316A1988-04-14
JP2001193376A2001-07-17
JPS6347416A1988-02-29
JPH07189249A1995-07-28
JP2000141358A2000-05-23
Attorney, Agent or Firm:
Masashi Noda
Shuji Sugimoto