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A platform for research: civil engineering, architecture and urbanism
Stability of rock-armoured mild slopes
https://orcid.org/0000-0002-6586-2010
Abstract Physical model tests have been performed to study static stability of rock-armoured mild slopes. Current stability design formulae for steeper rock-armoured slopes focus on plunging and surging waves. Slopes of 1:6 and milder usually have more spilling breakers which decreases the load. Also, on mild slopes displaced rocks more often remain present in the wave attack zone, which increases the strength. These aspects lead to an overdesigned structure when existing formulae for steep rock-armoured slopes are used. The present wave flume tests were used to understand the processes and develop a design formula for rock-armoured mild slopes with an impermeable core. These tests were performed for statically stable rock-armoured slopes of 1:6 to 1:10. The tests confirmed that not all existing damage parameters are able to accurately describe the static stability on milder slopes. For mild slopes it is more accurate to describe the damage based on the eroded depth rather than on the eroded area or number of moved stones. In this study, a design formula and guidelines are provided for practicing engineers that design or evaluate the stability of mild rock-armoured slopes.
Highlights On mild slopes a mixture of plunging and spilling breakers occurs, where the fraction of spilling breakers increases with decreasing surf similarity parameter. On mild slopes (1:6 to 1:10) displaced stones more often remain in the wave attack zone, still contributing to stability. Damage to rock-armoured mild slopes is best described by the local damage parameter E 3D, with a design value that is independent of the slope angle. Stones on mild slopes are more stable than given by current design guidelines. A calibrated design formula has been formulated for the static stability of rock-armoured slopes of 1:6 to 1:10.
Stability of rock-armoured mild slopes
https://orcid.org/0000-0002-6586-2010
Abstract Physical model tests have been performed to study static stability of rock-armoured mild slopes. Current stability design formulae for steeper rock-armoured slopes focus on plunging and surging waves. Slopes of 1:6 and milder usually have more spilling breakers which decreases the load. Also, on mild slopes displaced rocks more often remain present in the wave attack zone, which increases the strength. These aspects lead to an overdesigned structure when existing formulae for steep rock-armoured slopes are used. The present wave flume tests were used to understand the processes and develop a design formula for rock-armoured mild slopes with an impermeable core. These tests were performed for statically stable rock-armoured slopes of 1:6 to 1:10. The tests confirmed that not all existing damage parameters are able to accurately describe the static stability on milder slopes. For mild slopes it is more accurate to describe the damage based on the eroded depth rather than on the eroded area or number of moved stones. In this study, a design formula and guidelines are provided for practicing engineers that design or evaluate the stability of mild rock-armoured slopes.
Highlights On mild slopes a mixture of plunging and spilling breakers occurs, where the fraction of spilling breakers increases with decreasing surf similarity parameter. On mild slopes (1:6 to 1:10) displaced stones more often remain in the wave attack zone, still contributing to stability. Damage to rock-armoured mild slopes is best described by the local damage parameter E 3D, with a design value that is independent of the slope angle. Stones on mild slopes are more stable than given by current design guidelines. A calibrated design formula has been formulated for the static stability of rock-armoured slopes of 1:6 to 1:10.
Stability of rock-armoured mild slopes
https://orcid.org/0000-0002-6586-2010
Abstract Physical model tests have been performed to study static stability of rock-armoured mild slopes. Current stability design formulae for steeper rock-armoured slopes focus on plunging and surging waves. Slopes of 1:6 and milder usually have more spilling breakers which decreases the load. Also, on mild slopes displaced rocks more often remain present in the wave attack zone, which increases the strength. These aspects lead to an overdesigned structure when existing formulae for steep rock-armoured slopes are used. The present wave flume tests were used to understand the processes and develop a design formula for rock-armoured mild slopes with an impermeable core. These tests were performed for statically stable rock-armoured slopes of 1:6 to 1:10. The tests confirmed that not all existing damage parameters are able to accurately describe the static stability on milder slopes. For mild slopes it is more accurate to describe the damage based on the eroded depth rather than on the eroded area or number of moved stones. In this study, a design formula and guidelines are provided for practicing engineers that design or evaluate the stability of mild rock-armoured slopes.
Highlights On mild slopes a mixture of plunging and spilling breakers occurs, where the fraction of spilling breakers increases with decreasing surf similarity parameter. On mild slopes (1:6 to 1:10) displaced stones more often remain in the wave attack zone, still contributing to stability. Damage to rock-armoured mild slopes is best described by the local damage parameter E 3D, with a design value that is independent of the slope angle. Stones on mild slopes are more stable than given by current design guidelines. A calibrated design formula has been formulated for the static stability of rock-armoured slopes of 1:6 to 1:10.
Stability of rock-armoured mild slopes
Jumelet, Daan (author) / van Gent, Marcel R.A. (author) / Hofland, Bas (author) / Kuiper, Coen (author)
Coastal Engineering ; 187
2023-10-22
Article (Journal)
Electronic Resource
English
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