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Title:
COFFERDAM STRUCTURE AND COFFERDAM CLOSURE METHOD FOR UNDERWATER EXISTING STRUCTURE
Document Type and Number:
Japanese Patent JP2005264500
Kind Code:
A
Abstract:

To provide an environmentally harmless and economical cofferdam structure and a cofferdam closure method not attended with mass dredging.

In the cofferdam structure for surveying, repairing or reinforcing an underwater existing structure, reinforcing ring bodies of predetermined heights formed by circumferentially connecting a plurality of divided cofferdam steel plates at the outer periphery of the existing structure, and shaped to form a working space with a predetermined space at the outer periphery of the existing structure, are pressed into the water bottom ground around the existing structure while being connected in a plurality of stages in a depth direction, and a cofferdam member extending to the water surface is installed on the reinforcing ring bodies to form a dry working space around the outer periphery of the existing structure.


Inventors:
Soma, Atsutane
Umeda, Noriyoshi
Amano, Akira
Ogawa, Seiichiro
Yoshikawa, Osamu
Kawashima, Keiji
Iwamoto, Yasushi
Application Number:
JP2004000076291
Publication Date:
September 29, 2005
Filing Date:
March 17, 2004
Export Citation:
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Assignee:
SHIRAISHI CORP
International Classes:
E02D19/04; (IPC1-7): E02D19/04
Attorney, Agent or Firm:
林 信之
片寄 武彦