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Title:
LIQUEFACTION COUNTERMEASURE METHOD OF EXISTING BURIED PIPE
Document Type and Number:
Japanese Patent JP2015010362
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a liquefaction countermeasure method of an existing buried pipe in which a liquefaction countermeasure of lifelines of gas-pipes, potable water pipes, sewer pipes, etc., in residential areas such as subdivision lots for sale where roads and detached houses are densely built can be performed simply and economically.SOLUTION: Two or more filling pipes 2 are installed at predetermined intervals in an extension direction of an existing buried pipe 1. Liquid chemicals are injected from the filling pipes 2 by either following methods, and the existing buried pipe 1 is integrated with an agglomeration body in the earth to be refilled, and thereby the floating of the existing buried pipe 1 in the earthquake is suppressed. (1) A method for suppressing the floating of the existing buried pipe 1 in the earthquake by fixing the existing buried pipe 1 in the non-liquefaction layer of the natural ground. (2) A method for suppressing the floating of the existing buried pipe 1 by solidifying the earth to be refilled under the existing buried pipe to thereby cause the earth of the non-liquefaction layer to fall into right and left parts and the upper part thereof in the earthquake. (3) A method for suppressing the floating by solidifying the upper surface or the side surface of the existing buried pipe 1 and integrating the existing buried pipe 1 with the agglomeration body to thereby increase the gravity applied to the existing buried pipe 1 and the agglomeration body.

Inventors:
UCHIMURA TARO
TOHATA IKUO
SHIMADA SHUNSUKE
KOYAMA TADAO
Application Number:
JP2013135182A
Publication Date:
January 19, 2015
Filing Date:
June 27, 2013
Export Citation:
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Assignee:
UNIV OF TOKYO
KYOKADO ENGINEERING CO LTD
KYOKADO ENGINEERING CO LTD
International Classes:
E02D31/12; E02D27/34
Attorney, Agent or Firm:
Hisakado δΊ«
Hisakado Yasuko