Geotextile sand containers (GSC) have been used as permanent construction elements in coastal works for more than 20 years,becoming more and more popular as an alternative to the most typical coastal structures. Aim of this work is to analyze the hydrodynamic, stability and morphodynamic response of a GSC submerged reef by means of an experimental campaign. The first investigated aspect concerned the hydrodynamics. The reflection and transmission coefficients for regular and random waves were determined: the reflection coefficient decreases with increasing of kh; the transmission coefficient decreases with the increase of the incident wave. As regards the stability of the structure, it was observed that the strongest waves were able to lift the row of GSC more exposed to the wave action. An instability curve for the GSC as a function of the hydrodynamic characteristics was then found. Flow visualization close to the reef was performed by means of ink, showing that the flow becomes asymmetric in the proximity of the structure. Concerning the morphodynamics, long-term tests were performed to calculate the scour. This reached its maximum value at the end of each test and it is present in all three cases. The scour causes serious problems of instability to the structure.

Cammaroto, B., Faraci, C., Ferreri, G.B., Foti, E. (2014). Experimental investigation on a geocontainer Submerged reef. In Proc. of the 5th Conference on the Application of Physical Modelling to Port and Coastal Protection - Coastlab14. Varna : V. Pechev and F. Taveira Pinto.

Experimental investigation on a geocontainer Submerged reef

CAMMAROTO, Biagio;FERRERI, Giovanni Battista;
2014-01-01

Abstract

Geotextile sand containers (GSC) have been used as permanent construction elements in coastal works for more than 20 years,becoming more and more popular as an alternative to the most typical coastal structures. Aim of this work is to analyze the hydrodynamic, stability and morphodynamic response of a GSC submerged reef by means of an experimental campaign. The first investigated aspect concerned the hydrodynamics. The reflection and transmission coefficients for regular and random waves were determined: the reflection coefficient decreases with increasing of kh; the transmission coefficient decreases with the increase of the incident wave. As regards the stability of the structure, it was observed that the strongest waves were able to lift the row of GSC more exposed to the wave action. An instability curve for the GSC as a function of the hydrodynamic characteristics was then found. Flow visualization close to the reef was performed by means of ink, showing that the flow becomes asymmetric in the proximity of the structure. Concerning the morphodynamics, long-term tests were performed to calculate the scour. This reached its maximum value at the end of each test and it is present in all three cases. The scour causes serious problems of instability to the structure.
Settore ICAR/01 - Idraulica
30-set-2014
5th Conference on the Application of Physical Modelling to Port and Coastal Protection - Coastlab14
Varna (Bulgaria)
29 settembre - 2 ottobre 2014
5
lug-2014
2014
00
Cammaroto, B., Faraci, C., Ferreri, G.B., Foti, E. (2014). Experimental investigation on a geocontainer Submerged reef. In Proc. of the 5th Conference on the Application of Physical Modelling to Port and Coastal Protection - Coastlab14. Varna : V. Pechev and F. Taveira Pinto.
Proceedings (atti dei congressi)
Cammaroto, B; Faraci, C; Ferreri, GB; Foti, E
File in questo prodotto:
File Dimensione Formato  
EXPERIMENTAL INVESTIGATION ON A GEOCONTAINER SUBMERGED REEF.pdf

accesso aperto

Descrizione: Articolo intero
Dimensione 695.58 kB
Formato Adobe PDF
695.58 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/102321
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact