Device for limiting stresses in particular for buried tubular st

Details Device for limiting stresses in particular for buried tubular st Device for limiting stresses in particular for buried tubular st

1979-05-16

1981-02-24

Corbin, David H.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Lining

403 2, 405124, E21D 1122

Patent

active

042524644

ABSTRACT:
A device for limiting stresses exerted by neighbouring ground on a buried structure which comprises at least two neighbouring elements which form at least one part of the wall of the structure. The stress limiting device comprises at least one longitudinal slidable plate adapted to be connected by one of its edge portions to one of the neighbouring structure elements, at least two longitudinal guide elements adapted to be connected to the other structure element and applied respectively by one of their faces against at least the opposed edge portion of the slidable plate. A plurality of fixing means extend through apertures in the slidable plate and in the guide elements for clamping the opposed edge portion of the slidable plate between said guide elements. At least one of the guide elements constitutes a fishplate. At least the apertures in the opposed edge portion of the slidable plate are disposed in a plurality of spaced-apart longitudinal rows so that the zones located between the apertures of the same row of two adjacent rows form zones of deformation and/or fracture capable of yielding under the fixing means by a sliding of the slidable plate between the guide elements under the effect of forces which may be exerted on the device by the structure elements.

REFERENCES:
patent: 3318099 (1967-05-01), Sugden
patent: 3413813 (1968-12-01), Rock et al.
patent: 3638434 (1972-02-01), Delaere
patent: 4018054 (1977-04-01), Standley
patent: 4126403 (1978-11-01), Sweeney et al.

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