Title:
EXISTING FOUNDATION REMOVAL METHOD AND EXISTING FOUNDATION REMOVAL SYSTEM
Document Type and Number:
Japanese Patent JP2023030860
Kind Code:
A
Abstract:
To provide an existing foundation removal method and an existing foundation removal system capable of surely removing an existing hollow foundation underwater in a short period of time.SOLUTION: An existing foundation removal system 30 comprises a full circumference rotary excavator 13 fitted with a standard casing pipe 11, a large-diameter casing pipe 10 connected to the tip of the standard casing pipe 11, and an injection rod 15 capable of injecting fluid into the casing pipe 10. To remove a caisson 2, the casing pipe 10 is placed in the ground 1 around the caisson 2 to below a lower edge 27 of the caisson 2. After the improved ground 16 is formed inside the casing pipe 10 under the caisson 2, water is drained from the inside of the casing pipe 10, and filling material 8 is taken out from the inside of the caisson 2. Next, a suspension member 18 is fixed inside the caisson 2, and the caisson 2 is pulled out from the ground 1 while the muddy water 23 is injected between the casing pipe 10 and the caisson 2 to give buoyancy to the caisson 2.SELECTED DRAWING: Figure 5
More Like This:
Inventors:
OKUBO KENJI
Application Number:
JP2021136236A
Publication Date:
March 08, 2023
Filing Date:
August 24, 2021
Export Citation:
Assignee:
KAJIMA CORP
International Classes:
E02D19/04; E02D9/02; E02D19/16
Attorney, Agent or Firm:
Seiichi Inoue