TY - GEN
T1 - Rock slopes with open filters under wave loading
T2 - 35th International Conference on Coastal Engineering, ICCE 2016
AU - Van Gent, Marcel R.A.
AU - Wolters, Guido
AU - Van Der Werf, Ivo M.
PY - 2016
Y1 - 2016
N2 - Rubble mound breakwaters and revetments typically contain granular filters in one or more layers. The transition from the armour layer to the filter layer, and transitions between other layers within the structure, are normally geometrically tight to prevent material washout. This requires a limited ratio of the material size of the upper layer and neighbouring layer. An alternative is a geometrically open filter where in principle underlayer material can be transported into the upper layer, but if the hydraulic load at this transition between two layers remains low, the transition can be designed such that no or limited transport occurs, see for instance Van Gent and Wolters (2015), Van Gent et al (2015) and Jacobsen et al, (2017). This allows for larger ratios of material sizes, which can reduce the number of filter layers, and relax the material requirements with respect to the width of gradings. This can lead to considerable cost savings. In Van Gent and Wolters (2015) physical model tests for the transition between a layer of rock and an underlayer that consists of sand have been performed and design guidelines have been derived. Here, additional physical model tests are presented to study the influence of the storm duration and water level variations on the response of sand underneath a layer of rock.
AB - Rubble mound breakwaters and revetments typically contain granular filters in one or more layers. The transition from the armour layer to the filter layer, and transitions between other layers within the structure, are normally geometrically tight to prevent material washout. This requires a limited ratio of the material size of the upper layer and neighbouring layer. An alternative is a geometrically open filter where in principle underlayer material can be transported into the upper layer, but if the hydraulic load at this transition between two layers remains low, the transition can be designed such that no or limited transport occurs, see for instance Van Gent and Wolters (2015), Van Gent et al (2015) and Jacobsen et al, (2017). This allows for larger ratios of material sizes, which can reduce the number of filter layers, and relax the material requirements with respect to the width of gradings. This can lead to considerable cost savings. In Van Gent and Wolters (2015) physical model tests for the transition between a layer of rock and an underlayer that consists of sand have been performed and design guidelines have been derived. Here, additional physical model tests are presented to study the influence of the storm duration and water level variations on the response of sand underneath a layer of rock.
KW - Erosion
KW - Open filters
KW - Physical model tests
KW - Rock slopes
KW - Storm duration
KW - Water level variations
UR - http://www.scopus.com/inward/record.url?scp=85028653886&partnerID=8YFLogxK
UR - https://www.researchgate.net/publication/315047086_ROCK_SLOPES_WITH_OPEN_FILTERS_UNDER_WAVE_LOADING_EFFECTS_OF_STORM_DURATION_AND_WATER_LEVEL_VARIATIONS
M3 - Conference contribution
AN - SCOPUS:85028653886
T3 - Proceedings of the Coastal Engineering Conference
BT - Proceedings of the 35th International Conference on Coastal Engineering, ICCE 2016
A2 - Lynett, Patrick
PB - American Society of Civil Engineers (ASCE)
Y2 - 17 November 2016 through 20 November 2016
ER -