Title:
UNDERWATER COFFERDAM STRUCTURE AND CONSTRUCTION METHOD FOR THE SAME
Document Type and Number:
Japanese Patent JP2023090197
Kind Code:
A
Abstract:
To provide an underwater cofferdam structure which does not lower a dam reservoir level during construction, minimizes diving operation in a large depth, and can be efficiently and easily constructed, and a construction method for the same.SOLUTION: An underwater cofferdam structure has a steel pedestal 30 installed along an upstream face 51 of a dam body in the water, a caisson 10 having a plurality of blocks stacked in a vertical direction on the steel pedestal 30, and a door stop structure 20 provided between the caisson 10 and the upstream surface 51 of the dam, wherein the caisson 10 has a first block 101 at the uppermost stage and a second block 102 below the first block 101, the upper end surface of the second block 102 has a horizontal contact surface, the door stop structure 20 has a pair of door stop members and a buoyancy countermeasure member provided therebetween, the door stop members have a pair of inverted L shaped projections, the lower surface of the projections has a bearing surface parallel to a horizontal surface, and the buoyance acting on the caisson 10 is supported by the door stop structure 20 by bringing the contact surface of the second block 102 into contact with the bearing surface of the door stop structure 20.SELECTED DRAWING: Figure 1A
Inventors:
WAKUI TAKESHI
MURASAKI MASAYUKI
NIKO SACHIKO
SASAKI KOJI
ITO HIROYUKI
SHIBATA RYOMA
SAKAGAMI TOSHIAKI
MURASAKI MASAYUKI
NIKO SACHIKO
SASAKI KOJI
ITO HIROYUKI
SHIBATA RYOMA
SAKAGAMI TOSHIAKI
Application Number:
JP2021205033A
Publication Date:
June 29, 2023
Filing Date:
December 17, 2021
Export Citation:
Assignee:
NIPPON KOEI CO LTD
JAPAN WATER AGENCY
JAPAN WATER AGENCY
International Classes:
E02D23/00; E02D19/04
Attorney, Agent or Firm:
Kaname Takahashi
Tsuyoshi Oshio
Tsuyoshi Oshio