Precast permeable breakwater unit

Details Precast permeable breakwater unit Precast permeable breakwater unit

1990-02-28

1992-06-23

Corbin, David H.

Hydraulic and earth engineering

Bank, shore, or bed protection

Wave or flow dissipation

405 25, E02B 306

Patent

active

051237806

ABSTRACT:
A beam- or truss-like reinforced concrete unit to inhibit the erosion of shorelines, sand beaches and river banks by the retardation and diversion of flow across them, intended to be placed on the bottom at right angles to the flow of sand-laden water, without being fastened down. Transverse passages formed by lower chord, upper chord and diagonal members allow water to flow horizontally through the unit, but cause sand to drop out. Diagonal structural members provide great stiffness and strength, despite the presence of the open passages. To increase the fallout of sand, the passages are in two groups which meet at the centerplane of the unit, out of registry with each other, so that each group of passages is obstructed by the diagonal members which form the other group.

REFERENCES:
patent: 478154 (1892-07-01), Carson
patent: 1175962 (1916-03-01), Latham
patent: 2069715 (1937-02-01), Arpin
patent: 3415061 (1968-12-01), Staempfli
patent: 3733831 (1973-05-01), Sticker
patent: 4129006 (1978-12-01), Payne
patent: 4341489 (1982-07-01), Karnas
patent: 4431337 (1984-02-01), Iwasa
patent: 4439059 (1984-03-01), Kikuzawa et al.

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