Title:
STEEL PIPE FOR INNER EXCAVATION PILE CONSTRUCTION METHOD
Document Type and Number:
Japanese Patent JP2020026708
Kind Code:
A
Abstract:
To provide a steel pipe for an inner excavation pile construction method that can prevent excavated earth from adhering or stopping on shear keys when providing the shear keys protruding in an axial center perpendicular direction on a hollow side around a lower end of the steel pipe, regarding the steel pipe that is used for the inner excavation pile construction method to excavate by setting a down-the-hole hammer in the steel pipe in an inner excavation manner.SOLUTION: In a steel pipe for an inner excavation pile construction method provided with shear keys 13 protruding in an axial center perpendicular direction on a hollow side around a lower end of the steel pile 1 which is used for an inner excavation pile construction method to excavate by setting a down-the-hole hammer 6 in an inner excavation manner in the steel pipe 1 serving as a steel pipe pile or a steel pipe sheet pile, the shear key 13 has a round tip part protruding from a steel pipe inner wall to the axially perpendicular direction without having recesses in the cross section in the steel pipe axial direction.SELECTED DRAWING: Figure 1
Inventors:
YOKOYAMA HIROSUKE
INOUE MASAHIRO
KUSAKA HIROTAKA
KATO ATSUSHI
INOUE MASAHIRO
KUSAKA HIROTAKA
KATO ATSUSHI
Application Number:
JP2018153427A
Publication Date:
February 20, 2020
Filing Date:
August 17, 2018
Export Citation:
Assignee:
YOKOYAMA KISO KOJI KK
NIPPON STEEL CORP
NIPPON STEEL CORP
International Classes:
E02D7/00; E02D5/28; E02D5/50; E21B6/00
Domestic Patent References:
| JP2018091028A | 2018-06-14 | |||
| JP2006207320A | 2006-08-10 | |||
| JP2010242499A | 2010-10-28 | |||
| JP2017193930A | 2017-10-26 | |||
| JP2006299724A | 2006-11-02 | |||
| JP2000220139A | 2000-08-08 | |||
| JPH11100841A | 1999-04-13 | |||
| JPS63280119A | 1988-11-17 | |||
| JPS5748019A | 1982-03-19 |
Foreign References:
| US20170152711A1 | 2017-06-01 |
Attorney, Agent or Firm:
Tsukasa Kubo