Title:
橋脚補修・補強工事に用いる仮締切り構造体の設置工法
Document Type and Number:
Japanese Patent JP6864647
Kind Code:
B2
Abstract:
To provide an installation method for a cofferdam structure used in bridge pier maintenance and strengthening works, which can clean the top of a bed protection without requiring underwater works of divers during the cofferdam structure being placed on the bed protection at the bottom of a bridge pier.SOLUTION: A cylindrical cofferdam structure 3 is built surrounding the outer periphery of an unsubmerged part of a bridge pier 1. The cofferdam structure 3 is fitted with a plurality of jetting parts 5 on its peripheral wall 4, which jet high-pressure water downward in the cofferdam structure 3. While the cofferdam structure 3 is lowered into the water under the bridge, high-pressure water is jetted from the plurality of jetting parts 5 blowing away the deposit 6 piled on a bed protection 2 at the bottom part of the bridge pier 1, and the bottom part of the cofferdam structure 3 is settled on the bed protection 2. A cutoff means 7 is applied to the gap between the lower part of the cofferdam structure 3 and the bed protection 2, and the water 8 in the cofferdam structure 3 is discharged.SELECTED DRAWING: Figure 4
Inventors:
Hisato Kobayashi
Kenichi Sasaki
Kasuga Hidefumi
Kenichi Sasaki
Kasuga Hidefumi
Application Number:
JP2018078557A
Publication Date:
April 28, 2021
Filing Date:
April 16, 2018
Export Citation:
Assignee:
Daiichi Construction Industry Co., Ltd.
International Classes:
E02D37/00; E02D19/04; E02D27/32
Domestic Patent References:
| JP2008297748A | ||||
| JP2012167421A | ||||
| JP2018059333A | ||||
| JP59233031A | ||||
| JP2017071993A | ||||
| JP9189043A |
Foreign References:
| US9797110 |
Attorney, Agent or Firm:
Tsuyoshi Yoshii
Masae Yoshii
Shotaro Yoshii
Masae Yoshii
Shotaro Yoshii