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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 (718, Akasofu, Takaoka-sh, Toyama 06, 〒9330806, JP)
Application Number:
JP2014/069412
Publication Date:
January 28, 2016
Filing Date:
July 23, 2014
Export Citation:
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Assignee:
NAKAKURO CONSTRUCTION CO., LTD. (3-2-7, Nihonbashi Hongokucho Chuo-k, Tokyo 21, 〒1030021, JP)
AN ENGINEERING CO., LTD. (4-21-1-4515, Shibaura Minato-k, Tokyo 23, 〒1080023, JP)
International Classes:
F16L1/00; B29C63/32
Foreign References:
JPH1054494A1998-02-24
JP2008266971A2008-11-06
JP2007197301A2007-08-09
JP2007240249A2007-09-20
JP2006181861A2006-07-13
Attorney, Agent or Firm:
ONO, Shinjiro et al. (YUASA AND HARA, Section 206 New Ohtemachi Bldg., 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
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