Title:
METHOD FOR REHABILITATING EXISTING PIPE
Document Type and Number:
WIPO Patent Application WO/2016/013065
Kind Code:
A1
Abstract:
A construction method for rehabilitating an existing pipe, in which a rehabilitating pipe is constructed inside a previously laid pipe, and a backfill material is injected in between the inner surface of the previously laid pipe and the rehabilitating pipe, provides an improved reinforcement effect to the previously laid pipe. A method for rehabilitating an existing pipe formed containing a concrete material includes: a first step of directing a jet of high-pressure water to the inner surface of the existing pipe and thereby trimming the inner surface so as to allow only a portion of relatively high strength to remain; a second step of constructing a rehabilitating pipe inside the existing pipe; and a third step of injecting a backfill material in between the inner surface of the existing pipe having been trimmed in the first step and the rehabilitating pipe constructed in the second step.
Inventors:
NAKAKURO KENICHI (JP)
Application Number:
PCT/JP2014/069412
Publication Date:
January 28, 2016
Filing Date:
July 23, 2014
Export Citation:
Assignee:
NAKAKURO CONSTRUCTION CO LTD (JP)
AN ENGINEERING CO LTD (JP)
AN ENGINEERING CO LTD (JP)
International Classes:
F16L1/00; B29C63/32
Foreign References:
| JPH1054494A | 1998-02-24 | |||
| JP2008266971A | 2008-11-06 | |||
| JP2007197301A | 2007-08-09 | |||
| JP2007240249A | 2007-09-20 | |||
| JP2006181861A | 2006-07-13 |
Attorney, Agent or Firm:
ONO, Shinjiro et al. (JP)
Ono Shinjiro (JP)
Ono Shinjiro (JP)
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