Process for lowering building structures

Details Process for lowering building structures Process for lowering building structures

1989-01-31

1990-05-08

Taylor, Dennis L.

Hydraulic and earth engineering

Foundation

405230, E02D 1702

Patent

active

049233386

ABSTRACT:
The process herein disclosed to lower into the ground building structures, such as shutdown nuclear power plants or building structures to be erected as they are lowered. A caisson for supporting the building structure is provided below the bed plate of the building structure, and is lowered in steps together with the building structure. To permit a controlled lowering of the building structure by a predeterminable distance, the caisson is provided with a reinforced concrete top plate and with a reinforced concrete outer ring which depends from the rim of the top plate and constitutes an outer cutting edge. An inner reinforced concrete ring, which constitutes an inner cutting edge is arranged approximately on the same level as the outer ring. Hydraulic presses are placed between the top surface of the inner ring and the bottom surface of the top plate and are used to support the top plate on the inner ring. The soil between the rings is excavated with the presses extended and, a lowering sequence is initiated by retracting the presses so that the structure descends toward the inner ring. Soil is excavated from below the inner ring and the presses are again extended to push the inner ring further into the ground. The lowering sequence can then be repeated.

REFERENCES:
patent: 957844 (1910-05-01), Breuchaud
patent: 1005693 (1911-10-01), Clark
patent: 1827921 (1931-10-01), White
patent: 3685301 (1972-08-01), Heacox
patent: 3796055 (1974-03-01), Mahony
Underpinning the Cross Building, Fifth Avenue, New York Engineering News, 1912, vol. 68, No. 25, pp. 1134-1135.

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