Effect of deformations on the hydraulic stability of coastal structures made of geotextile sand containers

Recio, Juan Luis; Oumeraci, Hocine

doi:10.1016/j.geotexmem.2007.02.006

Cited by 34 publications

(11 citation statements)

References 8 publications

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“…However, there are many advantages to these systems of which the cost-effectiveness and the environmental-friendliness are possibly the most relevant ones working in support of the growing of interest and acceptance of the use of sand-filled geosystems for coastal protection also in higher wave energy coasts and as permanent structures. The research carried out at the Leichtweiβ Institute in Germany (see, e.g., Oumeraci and Recio, 2009;Recio, 2007;Recio and Oumeraci, 2007a, 2007b, 2007cOumeraci et al, 2002;Dassanayake, 2013) and at DELTARES in The Netherlands (see, e.g., van Steeg and Vastenburg, 2010; van Steeg and Breteler, 2008) has provided valuable improvements to the knowledge available on the stability of geotextile encapsulated-sand systems under wave loading. A recent research by das Neves (2011) gives further contribution to that knowledge, with emphasis on scour development and more widespread beach lowering.…”

Section: Wave-geosystems Interactionmentioning

confidence: 99%

Performance of submerged nearshore sand-filled geosystems for coastal protection

Neves

Moreira

Taveira-Pinto

et al. 2015

Coastal Engineering

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Section: Wave-geosystems Interactionmentioning

confidence: 99%

Performance of submerged nearshore sand-filled geosystems for coastal protection

Neves

Moreira

Taveira-Pinto

et al. 2015

Coastal Engineering

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“…Hardware and connections were selected to be sufficiently strong to resist the loads caused by external forces. Similar numerical studies (SU et al, 2008;DÜZBASTILAR AND ŞENTÜRK, 2009) and hydraulic experiments (INGSRISAWANG et al, 1995;1999;DÜZBASTILAR, et al, 2006;RECIO AND OUMERACI, 2007) and on-site research have been undertaken to understand and evaluate the mechanisms and effects of waves and currents on the benthic reefs. However, no information on the subject relative to FADs has so far been reported.…”

Section: Discussionmentioning

confidence: 98%

Two experimental fish aggregating systems (fads) in the Aegean sea: their design and application

Özgül¹,

Lök²,

Düzbastılar³

2011

Braz. j. oceanogr.

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A B S T R A C TTwo steel spar buoys were constructed and moored in 50 and 100 m deep of water in the Aegean Sea to support recreational fisheries. The first FAD was deployed at coordinates 38°01´48´´N 26°58´02´´E and at a distance of 3 nautical miles from the shoreline. The other FAD was moored at 1.1 nautical miles from the shoreline at coordinates 38°03´11´´N; 26°59´01´´E. An anchor (1.2x1.2x0.8 m3) weighing approximate 2.76 metric ton, made of reinforced concrete, was used to hold a FAD weighing approximate 1.5 metric ton. Hardware and connections of FADs, ropes, mooring calculation and anchor design were made. The interaction between the forces of wave and current and FADs in those waters was investigated. In the experiment, all forces (drag force, buoyancy force etc.) acting on FADs were calculated. It is proposed that the construction of the FADs should take the following design criteria into consideration: wave and current, forces related to the FADs, deployment depth, mooring hardware and ropes. This knowledge provides an important reference for stakeholders performing projects aiming to increase the performance and service life FADs.

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“…The soilbag wall structure consisted of a homogeneous porous medium. The seepage coefficient of permeability from Darcy's law was used to solve for k, as shown in Formula (2). where Q is the seepage discharge (cm 3 ·s -1 ); A is the soilbag wall cross sectional area (cm 2 ); H is the head (cm); and L is the soilbag wall height (cm); To study the influence of different bags sizes and arrangements on the permeability coefficient, tests were performed at different hydraulic gradients.…”

Section: Determination Of Permeability Coefficients For Soilbag Strucmentioning

confidence: 99%

“…These soilbags can be paved in a given arrangement to reinforce a foundation. At present [1][2], soilbag technology has been widely applied in civil engineering, water conservancy, port maintenance, road traffic, and other large projects [3][4][5][6]. Guanglu Li's research group applied polypropylene geotextile bags in terraced field ridges and walls and studied the economic benefit, failure mode and stability of this method [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Permeability and stability of soilbags in slope protection structures

Zhou¹,

Wang²,

Wang³

et al. 2018

IJHT

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Farmland drainage ditch slumps restrict recirculation of water resources in the irrigation area of Ningxia in China. To address this problem, soilbags are applied for farmland drainage ditch slope protection, because of their double efficacy in solid slope collapse prevention and water purification. Variations in the mean flow rate, weight of soil passing through the geotextile, and gradient ratio were analyzed based on filtration criteria. Filtration and permeability performance of soilbag technology was studied using a clogging and permeability test, which was performed with gradient ratio and penetration test instruments. Different hydraulic gradients and building structures were tested. The clogging test shows that a rapid increase in the hydraulic gradient can decrease the permeability coefficient of the soil-geotextiles system by 77.99%, lower filtration, reduce soil content per unit area, and increase leakage. The influence of the size of the soilbag (two different sizes were tested) and their arrangement was investigated. Penetration tests demonstrated that an overlapped structure with staggered joints significantly reduced the overall permeability coefficient. With a smaller bag size, the permeability coefficient of structure was larger. The permeability coefficient ratio with different bag arrangements was as high as 90.75%. The results indicate that flow through a soilbag structure is governed solely by the gaps between neighboring containers and that flow through the soil in the containers can be neglected. The arrangement of soilbags thus strongly affects the permeability of the structure. Combining these results with a masonry plan for slope protection in engineering applications with soilbags, the equivalent permeability coefficient of the soilbag slope protection increased 100% and seepage pressure decreased 50%, which effectively improved the stability of the slope protection. These results provide a theoretical basis for further engineering applications.

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Effect of deformations on the hydraulic stability of coastal structures made of geotextile sand containers

Cited by 34 publications

References 8 publications

Performance of submerged nearshore sand-filled geosystems for coastal protection

Performance of submerged nearshore sand-filled geosystems for coastal protection

Two experimental fish aggregating systems (fads) in the Aegean sea: their design and application

Permeability and stability of soilbags in slope protection structures

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