Process for lowering building structures

Details Process for lowering building structures Process for lowering building structures

1989-01-24

1991-02-05

Wasil, Daniel D.

Hydraulic and earth engineering

Pressurized caisson

405249, 376273, E02D 2306

Patent

active

049900269

ABSTRACT:
In a process of lowering building structures, such as shutdown nuclear power plants or building structures which are to be erected as they are lowered, a caisson is constructed below the bed plate of the building structure. The caisson has a reinforced top plate for supporting the building structure by means of supporting elements and a reinforced concrete ring which depends from the rim of the top plate to constitute a cutting edge. A transfer duct, which is lowered with the top plate, is provided adjacent the rim of the top plate. Superatmospheric pressure is maintained by means of air locks in a working chamber which is defined under the top plate and enclosed by the ring. To permit superatmospheric air pressure to be maintained in the working chamber, even when the transfer duct is extended during the lowering process, the top plate is connected at its rim to the bed plate by a sealing wall and is formed with an aperture which connects the working chamber to the space between the top plate and the bed plate. Air locks extending through the sealing wall are provided between the space and the transfer duct.

REFERENCES:
patent: 2065003 (1936-12-01), Widugier
patent: 2596788 (1952-05-01), Perkins
patent: 2678540 (1954-05-01), Lorenz
patent: 3755079 (1973-08-01), Weinstein et al.
patent: 4483790 (1984-11-01), Gaiser
patent: 4923338 (1990-05-01), Hertle et al.

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