RECENT PERFORMANCE OF LINKED CONCRETE MAT ARMOR UNDER WAVE AND ICE IMPACT

P.E. Gadd, C.B. Leidersdorf

Abstract


Concrete mat slope armor has been used for many years to provide slope protection in mild inland and coastal wave environments. Presently, flexible block revetments are gaining popularity for application in moderate wave climates where more conventional types of slope protection are uneconomical or unavailable. European investigators have undertaken design and model testing of placed (non-linked) concrete block revetment systems (Burger, et al., 1990, for example). Systems requiring physical linkage of adjacent blocks have been designed and deployed as well (Hayley, et al., 1987; Leidersdorf, et al., 1988; Munday and Bricker, 1987). Previous authors have described linked concrete mat systems in detail and suggest its promise for both Arctic and non-Arctic applications (Hayley, et al., 1987; Leidersdorf, et al., 1988; Munday and Bricker, 1987). The objective of this paper is to describe the results of on-going performance monitoring of linked concrete mat systems deployed upon a man-made island in the rigorous Arctic offshore environment. We wish to place particular emphasis upon recent observations that indicate performance liinitations of existing concrete mat technology when subjected to the combined effects of severe Arctic wave and ice impacts at offshore deepwater sites.

Keywords


concrete mat; linked mat; armor; mat armor; ice impact; revetment; revetment performance

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