CUT-OFF METHOD OF COFFERDAM STRUCTURE USED FOR BRIDGE PIER MAINTENANCE AND REINFORCING WORK

Japanese Patent JP2018031238

A

PROBLEM TO BE SOLVED: To provide a cut-off method of a cofferdam structure used for bridge pier maintenance and reinforcing work which can easily perform the cut-off work of the cofferdam structure without the necessity of underwater work by a diver.SOLUTION: In a cofferdam structure 2 which is constructed and arranged in a non-submerged point in an upper part of a bridge pier 1, a cut-off sheet 4 is arranged so as to cover a bottom of the structure, a hole edge sheet 6 folded to an upper side of a center hole 5 of the cut-off sheet 4 is arranged in a gap 7 between a penetration hole 3 of the bottom of the cofferdam structure 2 and the bridge pier 1, a fastening cable 8 for making the hole edge sheet 6 firmly adhere to an external peripheral face of the bridge pier 1 is wound to the outside of the hole edge sheet 6, a pull-moving part 9 of the fastening cable 8 is arranged at an upper part of the cofferdam structure 2, the cofferdam structure 2 is descended into water below a bridge, the hole edge sheet 6 is made to firmly adhere to an external peripheral face of the bridge pier 1 by pull-moving the pull-moving part 9 of the fastening cable 8 in an upper position than a water surface 10 below the bridge, and water is cut off.SELECTED DRAWING: Figure 8

SATO YUUKI
MURAKAMI KOJI
KASUGA HIDEFUMI

JP2016165847A

March 01, 2018

August 26, 2016

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DAIICHI KENSETSU CORP

E01D22/00; E02D19/04

JPH0551918A	1993-03-02
JP2014047533A	2014-03-17
JP2008297748A	2008-12-11

KR20000007036A

2000-02-07

Tsuyoshi Yoshii
Masae Yoshii

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