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Title:
PILE CONSTRUCTION MANAGEMENT METHOD
Document Type and Number:
Japanese Patent JP2017115533
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pile construction management method capable of saving time and efforts for re-implementation of pile erection construction caused due to an insufficient support strength, by extremely easily and surely determining, before pile erection, whether a pile distal end support strength of a pile hole is sufficient when erecting a cast-in-place pile or a precast pile within the pile hole that is opened on a ground.SOLUTION: After a pile hole H is opened on a ground G and before erecting a pile in the pile hole H, a penetration test machine 10 is inserted into the pile hole H and grounded. The penetration test machine comprises: a shaft-like knocking block 1 of which the distal end protrudes downwards; a drive hammer 2 which freely falls to strike the knocking block 1; and a suspension mechanism 3 which suspends the fallen drive hammer 2 and releases it down at a predetermined height. A support strength of a hole bottom Hb is determined from the number of times of striking required for the knocking block 1 to penetrate up to a predetermined depth from the hole bottom Hb. In the case where the support strength is equal to or more than a predetermined value, the pile is erected in the pile hole H.SELECTED DRAWING: Figure 1

Inventors:
KASHIMOTO TAKAHIKO
Application Number:
JP2015254925A
Publication Date:
June 29, 2017
Filing Date:
December 25, 2015
Export Citation:
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Assignee:
OAK:KK
International Classes:
E02D1/00; E02D5/24; E02D5/34; E02D7/00; E02D13/06
Attorney, Agent or Firm:
Hiroshi Masaki
Yuko Mikami
Tadashi Fujikawa



 
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