Hydraulic Performance of Elastomeric Bonded Permeable Revetments and Subsoil Response to Wave Loads

Abstract

Elastomeric bonded permeable revetments, also called PBA (Polyurethane bonded aggregate) revetments, are highly porous structures made of mineral aggregates (e.g. crushed stones) which are durably and elastically bonded by polyurethane (PU). Despite their numerous advantages as compared to conventional revetments and the large experience available from more than 25 pilot projects, physically-based design formulae to predict their hydraulic performance, wave loading and response are still lacking. Therefore, the present study aims at improving the understanding of the processes involved in the interaction between wave, revetment and foundation, based on largescale model tests performed in the Coastal Research Centre (FZK), Hannover/Germany, and to provide prediction formulae/diagrams. This paper is focused on the prediction of the hydraulic performance (wave reflection, wave runup and run-down) and the response of the sand core (pore pressure) beneath the revetment for a wide range of wave conditions, including the analysis of an observed failure due to transient soil liquefaction.

Numerical analysis of the interaction of irregular waves with two dimensional permeable coastal structures

“…Dekker et al, 2007;Oumeraci et al, 2010). The reflection coefficient for the sand fraction in these tests (1 mm-4 mm) fits nicely with those reflection coefficients reported for a 1:3 slope with a core of 3.4 mm sand; see Oumeraci et al (2010), their Fig. 3.…”

External and Internal Wave Set-Up at Porous Pba Revetments on a Sand Foundation

“…The results on the hydraulic performance, the wave loading and the response of the soil foundation have already been reported in many reports and papers. While most of the results are described in a detailed internal report (Oumeraci et al 2010b) and are summarised in Oumeraci et al 2012; part of the findings are published in Oumeraci et al (2010a) (reflection performance, wave run-up and run-down and failure of model alternative A) and Ludwigs et al (2010) (loads on and beneath the revetment) as well as Ludwigs & Oumeraci (2011) (load -displacement -pore pressure relations).…”