Abstract
The study of the scour around a monopile foundation and, in particular, the evaluation of the performance of alternative scour protection systems made of geotextile sand containers (GSCs) are here presented. Different configurations of the scour protection system were experimentally analyzed. The scour protection efficiency has been tested with both regular and random waves. A design dynamic formula for the scour protections is developed based on the stability of the GSC and, hence, on the evaluation of the weight of the geotextile sand container by means of the stability number. A damage level has been defined and related with the modified stability number. The paper provides useful information for the design of the scour protections made of geotextile sand containers, for the evaluation of the performance of such systems in terms of scour reduction, sinking and damage level of the scour protections.
Highlights
During the last years, the development of renewable energies led to the growth of wind farms and offshore platforms over the main seas
RESULTS the results about the efficiency of the alternative scour protection made of geotextile sand containers (GSCs) around a monopile is divided into subsection: damage, stability and sinking of the scour protections
The scour protections made of GSCs seems to be a good protection system, for the waves here tested
Summary
The development of renewable energies led to the growth of wind farms and offshore platforms over the main seas. There is substantial risk for the stability of the structure and solutions must be found to minimize the effects of seabed scouring at the foundation. In this perspective, laboratory experiments were carried out to investigate the emergence and development of the scour at the base of a slender monopile immersed within an erodible granular bed and exposed to waves. Whitehouse et al (2011) analyzed the scour and its protections from several offshore wind farms and other piled foundations. Recio e Oumeraci (2009) studied intensively the effect of waves over different geotextile sand container (GSC) configurations for shore protection structures
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