E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
61/2.2
E02D 29/12 (2006.01)
Patent
CA 1172050
Abstract There is provided a method and an arrangement for restricting local variations in ground level in the vi- cinity of surface water drains and manholes, at locations where the freezing and unfreezing of the ground causes the ground and parts of the drainage system located therein to move. To this end, the arrangement comprises a drain cover-support means arranged to be anchored in the surface ground layer in a conventional manner, and provided with a tubular part which projects down into the drain and is axially moveable relative thereto. A supporting element is arranged around the tubular part of the drain cover-support means, the supporting element being axially displaceable relative to the tubular part, while being guided by the upper part of the drain, and is arranged to be anchored in the surrounding ground layer. The supporting element preferably has the shape of a circular plate or disc, which abuts the tubular part substantially tightly, and the outer diameter of the plate or disc is about twice that of the diameter of the drain.
406272
Arntyr Oscar S.
Engstrom Thord I.
Arntyr Oscar S.
Engstrom Thord I.
Kirby Eades Gale Baker
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