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Geotechnical Failure of Revetments

by Adam Bezuijen, Delft Geotechnics, Delft, Netherlands,



Document Type: Proceeding Paper

Part of: Coastal Zone '91

Abstract:

A calculation method is developed to analyse the stability of a granular subsoil underneath a revetment under wave attack. This method leads to a minimum revetment weight per square meter necessary to prevent subsoil instability. With this method it is shown that the toe structure of the cover layer has a large influence on the subsoil stability. Calculations with the model show that instability of the subsoil can be expected on steep slopes with a subsoil of fine material. Furthermore the influence of the air content in the pore water on the stability is quantified. Comparison with the results of large scale model tests have shown that there is reasonable agreement; the calculated results are on the safe side.

Subject Headings: Subsoils | Failure analysis | Revetments | Soil stabilization | Soil analysis | Scale models | Geotechnical investigation

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