INSTALLATION METHOD FOR COFFERDAM STRUCTURE TO BE USED FOR BRIDGE PIER MAINTENANCE/REINFORCEMENT WORK

Title:

INSTALLATION METHOD FOR COFFERDAM STRUCTURE TO BE USED FOR BRIDGE PIER MAINTENANCE/REINFORCEMENT WORK

Document Type and Number:

Japanese Patent JP2018025039

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide an installation method for a cofferdam structure to be used for bridge pier maintenance/reinforcement work by which the cofferdam structure can be easily constructed on the water and work for moving the cofferdam structure downwards into the water may also be easily performed.SOLUTION: A suspension scaffold 2 is installed in a non-submergence location at an upper side of a bridge pier 1 and on the suspension scaffold 2, a cofferdam structure 3 is constructed. In a bottom part of the cofferdam structure, a through-hole part 4 that is disposed while penetrating the bridge pier 1 is provided and the cofferdam structure is installed so as to enclose an outer periphery of the bridge pier 1. In the bridge pier 1 and the cofferdam structure 3, fall guides 5 are installed and via the fall guides 5, and the cofferdam structure 3 is moved downwards into the water under a bridge in relative to the bridge pier 1. A clearance between the through-hole part 4 in the bottom part of the cofferdam structure 3 and the outer periphery of the bridge pier 1 is cut off by cutoff means 6. After the cutoff is completed, water 7 in the cofferdam structure 3 is drained and the inside of the cofferdam structure 3 is made into a dry area for work.SELECTED DRAWING: Figure 2

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Inventors:

SATO YUUKI
KASUGA HIDEFUMI
MURAKAMI KOJI

Application Number:

JP2016157448A

Publication Date:

February 15, 2018

Filing Date:

August 10, 2016

Export Citation:

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Assignee:

DAIICHI KENSETSU CORP

International Classes:

E01D22/00; E02D19/04; E04G3/30

Domestic Patent References:

JP2011069183A	2011-04-07
JPH09158470A	1997-06-17
JP2014047533A	2014-03-17
JP2001032215A	2001-02-06
JPH09158192A	1997-06-17

Foreign References:

CN101173499A

2008-05-07

Attorney, Agent or Firm:

Tsuyoshi Yoshii
Masae Yoshii

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