Large-Scale Physical Model Tests on Sand-Filled Geotextile Tubes and Containers Under Wave Attack

Steeg, P. van; Vastenburg, E; Bezuijen, Adam; Zengerink, E.; Gijt, J. de

doi:10.1142/9789814412216_0094

Cited by 5 publications

(4 citation statements)

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“…Before the study done by Van Steeg et al (2011), the behavior of geotextile tubes under wave loading was uncertain as no large modeling of geotextile tubes had been done.…”

Section: S Formula Of Stability According To Van Steeg Et Al (2011)mentioning

confidence: 99%

“…All failure resulted from sliding. Sand migration in tubes filled to less than 70% decrease stability, but is minimal in tubes with high filled to less than 70% decrease stability, but is minimal in tubes with high filling percentages ( Van Steeg et al 2011). F e b r u a r y 0 4 , 2 0 1 5 Where: Hs = significant wave height at limit of stability, Δt = relative density of density tube, B = width of geotextile tube, D = height of geotextile structure, f = friction coefficient of the geotextile tube and supporting structure interface, α = slope of the supporting structure, χ = reduction factor for lost energy due to overtopping.…”

Section: S Formula Of Stability According To Van Steeg Et Al (2011)mentioning

confidence: 99%

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Geosystems as an alternative to conventional coastal defense

Antón¹,

Almazán

Lechuga³

et al. 2015

JNS

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In recent decades, the increase in population on the coast, growth of erosion in many coastal stretches and the sea level rise, due to climate change, have led governments to invest more in protecting the coast. Geosystems have been shown as an alternative to conventional coastal structures because of cost reduction, efficiency of construction and speed of implementation. However this alternative leads to increase knowledge in their behavior, design and durability by the lack of suitable materials to withstand large storms, high diversity of non-standard methods or techniques and ease of degradation by vandalism.

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“…Before the study done by Van Steeg et al (2011), the behavior of geotextile tubes under wave loading was uncertain as no large modeling of geotextile tubes had been done.…”

Section: S Formula Of Stability According To Van Steeg Et Al (2011)mentioning

confidence: 99%

Section: S Formula Of Stability According To Van Steeg Et Al (2011)mentioning

confidence: 99%

Geosystems as an alternative to conventional coastal defense

Antón¹,

Almazán

Lechuga³

et al. 2015

JNS

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show abstract

“…In order to improve the effectiveness for longer waves against limited material costs, structures with relatively high width to volume ratio have been developed, commonly referred to as pontoon-type breakwaters (Burcharth et al, 2015). Mat-type floating breakwaters are generally fabricated from relatively cheap material such as old tyres (McGregor and Gilbert, 1982) or brushwood (van Steeg and van Wesenbeeck, 2011). These breakwaters attenuate waves through dissipation, hence requiring a large surface area to be effective.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on a breaking-enforcing floating breakwater

Van Der Zanden,

Van Der Hout,

Otto

et al. 2022

Journal of Coastal and Hydraulic Structures

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Floating breakwaters are moored structures that attenuate wave energy through a combination of reflection and dissipation. Studies into floating breakwaters have been generally restricted to optimising the attenuation performance. This study presents a novel floating breakwater type that was developed to have good attenuation performance while keeping wave drift loads as small as possible. The floating breakwater was designed as a submerged parabolic beach that enforces wave energy dissipation through breaking. The design was tested in a 3D shallow-water wave basin in captive and moored setups for regular and irregular wave conditions. Results are presented in terms of attenuation performance, motions, and (mooring) loads. The results show that the breaking of waves improves the attenuation performance of the floater in captive setup. However, in moored setup, the attenuation performance was dominated by diffraction and radiation of the wave field, with breaking being of secondary importance. This shows that breaking-enforcing floating breakwaters have potential, but require a high vertical hydrostatic and/or mooring stiffness in order to enforce intense breaking. Mean wave drift loads on the object showed significant difference between breaking and non-breaking waves in both setups, with breaking waves leading to lower normalized loads. This is attributed to breaking-induced set-up and set-down of the water level. As a result, the new breakwater design has a more favourable balance between wave attenuation and drift loads than common (i.e., box-, pontoon-, or mat-type) floating breakwater designs. Tests with varying surface roughness showed that floating breakwaters may benefit from dual-use functions that naturally increase the roughness (e.g., shellfish, vegetation), which have a marginal effect on the attenuation performance, but increase the added mass and hydrodynamic damping and as such, reduce mooring line loads.

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“…2 Due to the different wave loads and boundary conditions, prevailing on the slope and the crest of a coastal structure, different stability conditions and stability equations have been developed in the literature. 3–6…”

Section: Introductionmentioning

confidence: 99%

Experimental modeling of the interaction between waves and submerged flexible mound breakwaters

Jafarzadeh

Kabiri-Samani

Mansourzadeh

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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A submerged flexible mound breakwater can be employed for wave control in shallow water as an advanced alternative to the conventional rigid submerged designs. This study presents a flexible breakwater with an innovative geometry based on model experimentation. Experimental studies were performed to compare the wave energy dissipation by the flexible mound and rigid structures, over a range of test conditions, for example, three different diameters of structure, three water depths, and different regular wave heights for three different beach slopes. Results indicate that the present submerged flexible mound breakwater is stable, being appropriate for most operational sea conditions. Large amplitude waves can induce significant motions of the structure; therefore, the interaction between radiating and scattering waves is highly contributing to the wave energy dissipation. The wave energy dissipation at breaking zone of the present submerged flexible mound breakwater is significantly greater than that of the other types of flexible and rigid formerly investigated structures.

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Large-Scale Physical Model Tests on Sand-Filled Geotextile Tubes and Containers Under Wave Attack

Cited by 5 publications

References 0 publications

Geosystems as an alternative to conventional coastal defense

Geosystems as an alternative to conventional coastal defense

Experimental study on a breaking-enforcing floating breakwater

Experimental modeling of the interaction between waves and submerged flexible mound breakwaters

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