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Title:
PILING CONSTRUCTION MANAGEMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2017/110314
Kind Code:
A1
Abstract:
Provided is a piling construction management method that allows elimination of the effort of redoing piling construction because of insufficient support force by very easily and reliably determining whether the support force of a piling hole is sufficient for the distal end of a piling when erecting piling in a piling hole. The support strength of a hole bottom Hb2 is measured with a penetration testing device M1 before erecting a piling in a piling hole H1. The piling is erected in the piling hole H1 when the measurement is at or above a prescribed value , whereas the piling hole H1 is dug again and the support strength of the hole bottom Hb2 after being dug again is measured with the penetration testing device M1 in the same manner when the measurement is less than the prescribed value. A piling with a length corresponding to the piling hole H2 after being dug again is erected when the measurement is equal to or greater than the prescribed value. The penetration testing device M1: is one in which a knocking block 51 on which a penetration shaft 4 is integrated is struck by a drive hammer 52 in free-fall; comprises a lifting mechanism 8 that lifts the drive hammer 52 after falling to a prescribed height and releases same; and determines the support strength from the number of impacts required for the penetration shaft 4 to penetrate to a prescribed depth from the hole bottom Hb1.

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Inventors:
KASHIMOTO TAKAHIKO (JP)
Application Number:
PCT/JP2016/083919
Publication Date:
June 29, 2017
Filing Date:
November 16, 2016
Export Citation:
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Assignee:
OAK CO LTD (JP)
International Classes:
E02D1/02
Foreign References:
JPS61151307A1986-07-10
JP2005200962A2005-07-28
JP2013112953A2013-06-10
JP2009057693A2009-03-19
JPS5748019A1982-03-19
JPH06287944A1994-10-11
JP2013122121A2013-06-20
JPS54181704U1979-12-22
JPH09279560A1997-10-28
JPH05280031A1993-10-26
JP2000245058A2000-09-08
JP2003074045A2003-03-12
Other References:
See also references of EP 3263773A4
Attorney, Agent or Firm:
MASAKI, Yuji et al. (JP)
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