WO2011016068A1 - System for prevention of erosion phenomena on the beach - Google Patents

System for prevention of erosion phenomena on the beach Download PDF

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Publication number
WO2011016068A1
WO2011016068A1 PCT/IT2009/000369 IT2009000369W WO2011016068A1 WO 2011016068 A1 WO2011016068 A1 WO 2011016068A1 IT 2009000369 W IT2009000369 W IT 2009000369W WO 2011016068 A1 WO2011016068 A1 WO 2011016068A1
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Prior art keywords
beach
prevention
dunes
seabed
artificial
Prior art date
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PCT/IT2009/000369
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French (fr)
Inventor
Eugenio Lai
Original Assignee
Eugenio Lai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Eugenio Lai filed Critical Eugenio Lai
Priority to PCT/IT2009/000369 priority Critical patent/WO2011016068A1/en
Publication of WO2011016068A1 publication Critical patent/WO2011016068A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/23—Dune restoration or creation; Cliff stabilisation

Definitions

  • the present invention relates to a system for prevention of erosion phenomena on the beach, where erosion is essentially due to action of winds that remove sand particles on ground, and it is also due to smashing waves close to the shore-line, that hit the seabed with a strong energy, and remove other sand particles that are lost because flown away by undersea currents.
  • the proposed solution essentially discloses a set of artificial dunes, placed on the beach, and a modular wall, that is installed instead on the front seabed.
  • the artificial dunes properly enriched with some vegetation, catch sand particles contained in the winds, and cause them to fall down on the ground, avoiding them to be lost far in the environment.
  • the undersea wall represents a shield protecting the seabed from the smashing waves, being further able to catch sand particles, contained in suspension into the water, and to make them to be collected on the seabed, avoiding them to be lost because flown away by undersea currents.
  • the state of the art includes some well known solutions able to solve the problem of preventing the erosion phenomena on the beaches and avoiding that sand is lost in the environment.
  • Patent US 4.978.247 discloses a special device that is installed on the shore-line of the beach, and protects it from smashing waves. It comprises some holes where the water can flow freely inside, so that eventual sand particles can be caught and not lost far in the sea.
  • the same device is modular, so that it can be transported and assembled in order to achieve real protecting walls on surface of the beach.
  • Patent US 5.238.326 discloses another device that has a more complex structure and that is installed deep on the seabed, at the point in front of the beach where waves are usual to smash.
  • the mechanism of collision of waves on the seabed causes some sand particles to be removed, and that is the basic principle behind the loss of sand in the sea.
  • a modular device like the described one, is able on one side to resist to the force of the smashing wave, and on the other side to facilitate the sedimentation of sand particles that in this way are not lost because flown away by undersea currents.
  • Patent US 5.509.755 discloses instead a combined system, comprising either an undersea's wall, placed on the seabed in front of the beach, and an on-shore structure with some artificial dunes, placed on the rear part of the same beach.
  • the combined action of these two parts allows a simultaneous protection in respect of the undersea currents and surface winds, with a landscape's configuration that is approximately the ideal natural one in order to prevent the loss of sand.
  • this invention which main objective is to disclose a system for prevention of erosion phenomena on the beach, allowing the use of this area by tourists and residents, respecting at the same time the aesthetical and functional balance with the existing structures and natural landscapes.
  • the same system comprises some undersea's structures that are heavy and strong enough so that they can resist to the force of winter storms, and at the same time they allow the water exchange with the environment, so that physical and biological equilibrium points of the ecosystem are not changed, keeping the same natural composition of water.
  • Another further objective is that the same system is designed according to the natural action of winds and undersea currents, decreasing the loss of sand in the long term without introducing obstacles in the use of the environment by persons and without changing the global equilibrium points of the ecosystem.
  • Another objective is that all the items belonging to this system are made of a heavy and strong material, that does not present any chemical reaction with the environment or with high salt concentration water, and that is not subject to corrosion phenomena or release of substances to the environment in the long term.
  • a system for prevention of erosion phenomena on the beach comprising a set of artificial dunes, placed on the beach, and a modular wall, that is placed instead on the front seabed, characterized in that:
  • each of said artificial dunes comprises a casing, made of a heavy and strong material, able to resist to the wearing effect in the sea environment, like i.e. glass fiber reinforced concrete, and is geometrically shaped in such a way to recall, aesthetically and practically, the form of a real natural dune;
  • the same casing can be empty inside and filled of a definite quantity of soil and vegetation, said vegetation being of different types and classes for a proper growth in a seaside's environment;
  • said artificial dunes are placed along a parallel direction to the shoreline, each following the other, in such a way to achieve a cord of preventing items that catch sand particles contained in the winds, and cause them to fall down on the ground, avoiding them to be lost far in the environment;
  • each item of the modular wall is composed of a casing, made of a heavy and strong material, able to resist to the wearing effect in the undersea environment, like i.e. glass fiber reinforced concrete, and is geometrically shaped as a prism, with a vertical bended side, having on each lateral and upper side a certain number of holes; said wall is placed on the seabed in front of the beach, so that to protect the equilibrium of the undersea's ecosystem, and at the same time to represent a shield protecting the seabed from the smashing waves, being further able to catch sand particles, contained in suspension into the water, and to make them to be collected on the seabed, avoiding them to be lost because flown away by undersea currents.
  • a casing made of a heavy and strong material, able to resist to the wearing effect in the undersea environment, like i.e. glass fiber reinforced concrete, and is geometrically shaped as a prism, with a vertical bended side, having on each lateral and upper
  • figure 1 is a front perspective view of an element of modular wall, that is installed on the seabed in front of the beach;
  • figure 2 is a lateral view of the same element of figure 1 , where it is shown a hole for the passage of water;
  • figure 3 is a front perspective view of the same element of figure 1 , where the inner separative surface between modules is better shown;
  • figure 4 is a lateral view of the same element of figure 1 , where it is shown its installation on the seabed;
  • figure 5 is a front perspective view of the same element of figure 1 , where it is shown the inner growth of undersea vegetation and the colonization by organisms and sea animal species;
  • figure 6 is a lateral view of the same element of figure 1 , where it is shown the flow of respective currents on the straight side and the bended side;
  • figure 7 is a perspective view of an underwater landscape including the installation of a modular wall
  • figure 8 is a front, lateral and top view of a module of artificial dune, in the so called “closed” embodiment, that is installed on the beach surface;
  • figure 9 is a lateral view of the same module of artificial dune of figure 8, that is installed on the beach surface;
  • figure 10 is a front perspective view of a module of artificial dune, in the so called “open” embodiment, containing a certain quantity of soil and vegetation, that is installed on the surface of the beach.
  • Figures 1-6 show an element 10 of a modular wall 20 that is installed on the seabed in front of the beach, in a direction that is parallel to the shore-line.
  • the described solution is related, in particular, to Poetto beach of Cagliari, in Sardinia - Italy, and it is designed according to some respective typical waves and pressure profiles, in order to achieve an underwater wall 20, like that shown in figure 7, to be installed at a distance of 250-350 m from the shore-line, and at a depth of 4-5 m.
  • this wall 20 causes a partial break-down of waves, obtaining a loss of energy in the front end of waves, and then a decrease of the related erosion potential; at the same time it changes the slope of the seabed and decreases the angle of incoming waves, in such a way to further decrease the erosion phenomena.
  • the artificial walls 20 have the additional function of permitting to achieve complex structures on the seabeds, that are possible sites where fish, shellfish, and other species can live, in such a way to allow the population of wild fish to be increased and to guarantee a good level of biological variety in the sea (like it is shown in figure 5).
  • Each module 10 of the artificial wall 20 is made of a composite material, the so called glass fiber reinforced concrete (GFRC), that is essentially concrete mixed with silicon sands and glass fibers.
  • the glass fibers are the alkaline-resistant ones (AR).
  • the plates of GFRC are obtained spraying mortar and glass fibers in properly shaped housings, and are characterized in having a physical strength up to 300 Kg/cm 2 with reference to a structural thickness of approximately 1 ,2 cm.
  • Each module 10 has a length of 10 m, a height of 1,5 m, and a average width of 1,35 m; the walls 11 of module 10 have instead a thickness of 1 ,2 cm.
  • the same walls 11 of module 10 present holes 13 having diameter of 20 cm, placed on properly ordered lines.
  • the holes 13 have a multiple function: they mainly control the exchange of the water-sand mix from a wall to the other, as shown in figure 6, and then, they are possible sites where fish, shellfish, and other species can live.
  • each module 10 to the seabed is provided by 6 wedge elements that are inserted into the sand in order to keep the structure in a properly steady and resistant position in front of possible storms.
  • structure 20 is installed completely under the water, it does not affect the aesthetical landscape of the coast, it does not require to change the plans of surface boat traffic, it does not affect the hydrodynamics of undersea currents, and it keeps the same conditions of the adjacent beaches.
  • Figures 8-9 show an example of an artificial dune 30, 40, that is geometrically shaped in such a way to recall, aesthetically and practically, the form of a real natural dune.
  • a set of artificial dunes 30, 40 are placed along a parallel direction to the shore- line, each following the other, at a distance of 30-60 m, in such a way to achieve a cord of preventing items that catch sand particles contained in the winds, and cause them to fall down on the ground, avoiding them to be lost far in the environment.
  • modules There are two possible types of modules: a first having a "closed” structure 30 (figures 8-9) and a second having a "open” structure 40 (figure 10).
  • the first appears like a real sand dune, instead the second contains a definite quantity of soil and vegetation 42 inside, of proper types and nature, able to grow up in the environment of a seaside.
  • the vegetation especially in case of timber trees or palms, protects the beach even more effectively, because it allows to catch sand particles at a high altitude from ground.
  • the basic body 31, 41 of each module 30, 40 is made of a composite material, the so called glass fiber reinforced concrete (GFRC), that is essentially concrete mixed with silicon sands and glass fibers.
  • GFRC glass fiber reinforced concrete
  • the glass fibers are the alkaline-resistant ones (AR).
  • Each module 30, 40, of the artificial dune has a basic body 31, 41 having a length of 5-10 m, a height of 1-1 ,5 m, and a width between 3 and 5 m; the walls of the module have a thickness of 1,2 cm.
  • the modules 30, 40 are placed on the beach without any foundation structure, and they achieve a real on-shore wall, that protects the seaside from possible loss of sand removed away by winds.
  • Either said elements 30, 40 do not change the aesthetical landscape of the coast and do not create any obstacle to the normal use of the beach by tourists and residents.
  • the composition of materials does not present any chemical reaction with the environment, so that it guarantees that structures are fully compatible with the environment in the long term.
  • the present invention achieves all the proposed objectives.
  • it discloses a special system for prevention of erosion phenomena on the beach, allowing the use of this area by tourists and residents, respecting at the same time the aesthetical and functional balance with the existing structures and natural landscapes.
  • the same system comprises some undersea structures that are heavy and strong enough so that they can resist to the force of winter storms, and at the same time they allow the water exchange with the environment, so that physical and biological equilibrium points of the ecosystem are not changed, keeping the same natural composition of water.
  • the same specific system is designed according to the natural action of winds and undersea currents, decreasing the loss of sand in the long term without introducing obstacles in the use of the environment by persons and without changing the global equilibrium points of the ecosystem.

Abstract

System for prevention of erosion of a beach, comprising: a set of artificial dunes (30, 40), placed on the beac; a modular wall (20) placed on the front seabed; wherein each of said dunes (30, 40) comprises a casing (31, 41), made of glass fiber reinforced concrete, shaped in the form of dune; the casing (31, 41) can be filled of oil and vegetation (42); said dunes (30, 40) are placed along a parallel direction to the shore-line, each following the other, to achieve a cord of items catching sand particles contained in the winds making them falling down on the ground;- each item (10) of the wall (20) is composed of a casing (11), made of glass fiber reinforced concrete, shaped as a prism, with a vertical bended side (12), having holes (13) on each lateral and upper side; said wall (20) is placed on seabed in front of the beach, to protect the seabed from waves, being able to catch sand, contained into the water, making them collecting on the seabed.

Description

SYSTEM FOR PREVENTION OF EROSION PHENOMENA ON THE BEACH.
* * *
The present invention relates to a system for prevention of erosion phenomena on the beach, where erosion is essentially due to action of winds that remove sand particles on ground, and it is also due to smashing waves close to the shore-line, that hit the seabed with a strong energy, and remove other sand particles that are lost because flown away by undersea currents.
The proposed solution essentially discloses a set of artificial dunes, placed on the beach, and a modular wall, that is installed instead on the front seabed. The artificial dunes, properly enriched with some vegetation, catch sand particles contained in the winds, and cause them to fall down on the ground, avoiding them to be lost far in the environment. The undersea wall represents a shield protecting the seabed from the smashing waves, being further able to catch sand particles, contained in suspension into the water, and to make them to be collected on the seabed, avoiding them to be lost because flown away by undersea currents.
The state of the art includes some well known solutions able to solve the problem of preventing the erosion phenomena on the beaches and avoiding that sand is lost in the environment.
Patent US 4.978.247 (Lenson) discloses a special device that is installed on the shore-line of the beach, and protects it from smashing waves. It comprises some holes where the water can flow freely inside, so that eventual sand particles can be caught and not lost far in the sea. The same device is modular, so that it can be transported and assembled in order to achieve real protecting walls on surface of the beach.
Patent US 5.238.326 (Creter) discloses another device that has a more complex structure and that is installed deep on the seabed, at the point in front of the beach where waves are usual to smash. The mechanism of collision of waves on the seabed causes some sand particles to be removed, and that is the basic principle behind the loss of sand in the sea. A modular device, like the described one, is able on one side to resist to the force of the smashing wave, and on the other side to facilitate the sedimentation of sand particles that in this way are not lost because flown away by undersea currents.
Patent US 5.509.755 (Olsen et al.) discloses instead a combined system, comprising either an undersea's wall, placed on the seabed in front of the beach, and an on-shore structure with some artificial dunes, placed on the rear part of the same beach. The combined action of these two parts allows a simultaneous protection in respect of the undersea currents and surface winds, with a landscape's configuration that is approximately the ideal natural one in order to prevent the loss of sand.
All the above known solutions involve a certain number of drawbacks, and some of them are particularly relevant, so that they could jeopardize the opportunity to install such devices on beaches, because they present a poor level of prevention with reference to erosion phenomena.
All these problems are overcome by this invention, which main objective is to disclose a system for prevention of erosion phenomena on the beach, allowing the use of this area by tourists and residents, respecting at the same time the aesthetical and functional balance with the existing structures and natural landscapes.
Another objective is that the same system comprises some undersea's structures that are heavy and strong enough so that they can resist to the force of winter storms, and at the same time they allow the water exchange with the environment, so that physical and biological equilibrium points of the ecosystem are not changed, keeping the same natural composition of water.
Another further objective is that the same system is designed according to the natural action of winds and undersea currents, decreasing the loss of sand in the long term without introducing obstacles in the use of the environment by persons and without changing the global equilibrium points of the ecosystem.
Another objective is that all the items belonging to this system are made of a heavy and strong material, that does not present any chemical reaction with the environment or with high salt concentration water, and that is not subject to corrosion phenomena or release of substances to the environment in the long term.
Therefore, it is specific subject of the present invention a system for prevention of erosion phenomena on the beach, comprising a set of artificial dunes, placed on the beach, and a modular wall, that is placed instead on the front seabed, characterized in that:
each of said artificial dunes comprises a casing, made of a heavy and strong material, able to resist to the wearing effect in the sea environment, like i.e. glass fiber reinforced concrete, and is geometrically shaped in such a way to recall, aesthetically and practically, the form of a real natural dune; the same casing can be empty inside and filled of a definite quantity of soil and vegetation, said vegetation being of different types and classes for a proper growth in a seaside's environment; said artificial dunes are placed along a parallel direction to the shoreline, each following the other, in such a way to achieve a cord of preventing items that catch sand particles contained in the winds, and cause them to fall down on the ground, avoiding them to be lost far in the environment;
- each item of the modular wall is composed of a casing, made of a heavy and strong material, able to resist to the wearing effect in the undersea environment, like i.e. glass fiber reinforced concrete, and is geometrically shaped as a prism, with a vertical bended side, having on each lateral and upper side a certain number of holes; said wall is placed on the seabed in front of the beach, so that to protect the equilibrium of the undersea's ecosystem, and at the same time to represent a shield protecting the seabed from the smashing waves, being further able to catch sand particles, contained in suspension into the water, and to make them to be collected on the seabed, avoiding them to be lost because flown away by undersea currents.
The present invention is now being described by way of illustration, still not restrictive, with particular reference to the figures of the enclosed drawings, wherein: figure 1 is a front perspective view of an element of modular wall, that is installed on the seabed in front of the beach;
figure 2 is a lateral view of the same element of figure 1 , where it is shown a hole for the passage of water;
figure 3 is a front perspective view of the same element of figure 1 , where the inner separative surface between modules is better shown;
figure 4 is a lateral view of the same element of figure 1 , where it is shown its installation on the seabed;
figure 5 is a front perspective view of the same element of figure 1 , where it is shown the inner growth of undersea vegetation and the colonization by organisms and sea animal species;
figure 6 is a lateral view of the same element of figure 1 , where it is shown the flow of respective currents on the straight side and the bended side;
figure 7 is a perspective view of an underwater landscape including the installation of a modular wall; figure 8 is a front, lateral and top view of a module of artificial dune, in the so called "closed" embodiment, that is installed on the beach surface;
figure 9 is a lateral view of the same module of artificial dune of figure 8, that is installed on the beach surface;
figure 10 is a front perspective view of a module of artificial dune, in the so called "open" embodiment, containing a certain quantity of soil and vegetation, that is installed on the surface of the beach.
The following description underlines some of the many embodiments of the present invention just as an example. In fact many others are the possible embodiments depending on the technical solution adopted. The different figures show the same components with the same reference numbers.
Figures 1-6 show an element 10 of a modular wall 20 that is installed on the seabed in front of the beach, in a direction that is parallel to the shore-line. The described solution is related, in particular, to Poetto beach of Cagliari, in Sardinia - Italy, and it is designed according to some respective typical waves and pressure profiles, in order to achieve an underwater wall 20, like that shown in figure 7, to be installed at a distance of 250-350 m from the shore-line, and at a depth of 4-5 m. The presence of this wall 20 causes a partial break-down of waves, obtaining a loss of energy in the front end of waves, and then a decrease of the related erosion potential; at the same time it changes the slope of the seabed and decreases the angle of incoming waves, in such a way to further decrease the erosion phenomena.
The artificial walls 20 have the additional function of permitting to achieve complex structures on the seabeds, that are possible sites where fish, shellfish, and other species can live, in such a way to allow the population of wild fish to be increased and to guarantee a good level of biological variety in the sea (like it is shown in figure 5). b
Each module 10 of the artificial wall 20 is made of a composite material, the so called glass fiber reinforced concrete (GFRC), that is essentially concrete mixed with silicon sands and glass fibers. The glass fibers are the alkaline-resistant ones (AR). The plates of GFRC are obtained spraying mortar and glass fibers in properly shaped housings, and are characterized in having a physical strength up to 300 Kg/cm2 with reference to a structural thickness of approximately 1 ,2 cm.
It is here underlined that this mix of materials does not present any chemical reaction with the environment and that is not subject to corrosion phenomena, avoiding any possible release of substances in the environment.
Each module 10 has a length of 10 m, a height of 1,5 m, and a average width of 1,35 m; the walls 11 of module 10 have instead a thickness of 1 ,2 cm. The same walls 11 of module 10 present holes 13 having diameter of 20 cm, placed on properly ordered lines. The holes 13 have a multiple function: they mainly control the exchange of the water-sand mix from a wall to the other, as shown in figure 6, and then, they are possible sites where fish, shellfish, and other species can live.
The anchorage of each module 10 to the seabed is provided by 6 wedge elements that are inserted into the sand in order to keep the structure in a properly steady and resistant position in front of possible storms. In particular, considering that structure 20 is installed completely under the water, it does not affect the aesthetical landscape of the coast, it does not require to change the plans of surface boat traffic, it does not affect the hydrodynamics of undersea currents, and it keeps the same conditions of the adjacent beaches.
Figures 8-9 show an example of an artificial dune 30, 40, that is geometrically shaped in such a way to recall, aesthetically and practically, the form of a real natural dune. A set of artificial dunes 30, 40, are placed along a parallel direction to the shore- line, each following the other, at a distance of 30-60 m, in such a way to achieve a cord of preventing items that catch sand particles contained in the winds, and cause them to fall down on the ground, avoiding them to be lost far in the environment.
There are two possible types of modules: a first having a "closed" structure 30 (figures 8-9) and a second having a "open" structure 40 (figure 10). The first appears like a real sand dune, instead the second contains a definite quantity of soil and vegetation 42 inside, of proper types and nature, able to grow up in the environment of a seaside. The vegetation, especially in case of timber trees or palms, protects the beach even more effectively, because it allows to catch sand particles at a high altitude from ground.
Either in this case, the basic body 31, 41 of each module 30, 40, is made of a composite material, the so called glass fiber reinforced concrete (GFRC), that is essentially concrete mixed with silicon sands and glass fibers. The glass fibers are the alkaline-resistant ones (AR).
Each module 30, 40, of the artificial dune has a basic body 31, 41 having a length of 5-10 m, a height of 1-1 ,5 m, and a width between 3 and 5 m; the walls of the module have a thickness of 1,2 cm. The modules 30, 40, are placed on the beach without any foundation structure, and they achieve a real on-shore wall, that protects the seaside from possible loss of sand removed away by winds.
Either said elements 30, 40, do not change the aesthetical landscape of the coast and do not create any obstacle to the normal use of the beach by tourists and residents. The composition of materials does not present any chemical reaction with the environment, so that it guarantees that structures are fully compatible with the environment in the long term.
Therefore, the above examples show that the present invention achieves all the proposed objectives. In particular, it discloses a special system for prevention of erosion phenomena on the beach, allowing the use of this area by tourists and residents, respecting at the same time the aesthetical and functional balance with the existing structures and natural landscapes.
In addition, according to this invention, the same system comprises some undersea structures that are heavy and strong enough so that they can resist to the force of winter storms, and at the same time they allow the water exchange with the environment, so that physical and biological equilibrium points of the ecosystem are not changed, keeping the same natural composition of water.
Furthermore, the same specific system is designed according to the natural action of winds and undersea currents, decreasing the loss of sand in the long term without introducing obstacles in the use of the environment by persons and without changing the global equilibrium points of the ecosystem.
Finally, all the items belonging to this system are made of a heavy and strong material, that does not present any chemical reaction with the environment or with high salt concentration water, and that is not subject to corrosion phenomena or release substances to the environment in the long term.
The present invention has been described by way of illustration, still not restrictive, in accordance with embodiments that better suit the needs; however possible changes and/or modifications may be introduced by those skilled in the art without departing from the relevant scope, as defined in the enclosed claims.

Claims

y CLAIMS
1. System for prevention of erosion phenomena on the beach, comprising a set of artificial dunes (30, 40), placed on the beach, and a modular wall (20), that is placed instead on the front seabed, characterized in that:
- each of said artificial dunes (30, 40) comprises a casing (31, 41), made of a heavy and strong material, able to resist to the wearing effect in the sea environment, like i.e. glass fiber reinforced concrete, and is geometrically shaped in such a way to recall, aesthetically and practically, the form of a real natural dune; the same casing (31, 41) can be empty inside and filled of a definite quantity of soil and vegetation (42), said vegetation being of different types and classes for a proper growth in a seaside's environment; said artificial dunes (30, 40) are placed along a parallel direction to the shore-line, each following the other, in such a way to achieve a cord of preventing items that catch sand particles contained in the winds, and cause them to fall down on the ground, avoiding them to be lost far in the environment;
- each item (10) of the modular wall (20) is composed of a casing (11), made of a heavy and strong material, able to resist to the wearing effect in the undersea environment, like i.e. glass fiber reinforced concrete, and is geometrically shaped as a prism, with a vertical bended side (12), having on each lateral and upper side a certain number of holes (13); said wall (20) is placed on the seabed in front of the beach, so that to protect the equilibrium of the undersea's ecosystem, and at the same time to represent a shield protecting the seabed from the smashing waves, being further able to catch sand particles, contained in suspension into the water, and to make them to be collected on the seabed, avoiding them to be lost because flown away by undersea currents.
2. System for prevention of erosion phenomena on the beach, according to claim 1 , characterized in that:
- each item (10) of the modular wall (20) is made of a composite material, the so called glass fiber reinforced concrete (GFRC), that is essentially concrete mixed with silicon sands and glass fibers; the glass fibers are the alkaline-resistant ones
(AR),
so that it presents a physical strength up to 300 Kg/cm2, with reference to a structural thickness of approximately 1 ,2 cm, it does not present any chemical reaction with the environment, it does not present any corrosion phenomena, and it guarantees that structures are fully compatible with the environment in the long term.
3. System for prevention of erosion phenomena on the beach, according to one or more of previous claims, characterized in that:
- each item (10) has a length of 10 m, a height of 1,5 m, and a average width of 1 ,35 m; the walls (11) of item (10) have instead a thickness of 1 ,2 cm.
4. System for prevention of erosion phenomena on the beach, according to one or more of previous claims, characterized in that:
- each of said artificial dunes (30, 40) comprises a casing (31, 41) that has a length of 5-10 m, a height of 1-1,5 m, and a width between 3 and 5 m; the walls of said artificial dunes (30, 40) have a thickness of 1 ,2 cm.
5. System for prevention of erosion phenomena on the beach, according to one or more of previous claims, characterized in that:
- said walls (11) of item (10) present holes (13) having diameter of 20 cm, placed on properly ordered lines; the holes (13) have a multiple function: they mainly control the exchange of the water-sand mix from a wall (11) to the other (12), and then, they are possible sites where fish, shellfish, and other species can live, so that they allow the population of wild fish to be increased and they guarantee a good level of biological variety in the sea.
6. System for prevention of erosion phenomena on the beach, according to one or more of previous claims, characterized in that:
- the modular wall (20) is installed completely under the water, at a distance of 250- 350 m from the shore-line, and at a depth of 4-5 m,
so that it does not affect the aesthetical landscape of the coast, it does not require to change the plans of surface boat traffic, it does not affect the hydrodynamics of undersea currents, and it keeps the same conditions of the adjacent beaches.
7. System for prevention of erosion phenomena on the beach, according to one or more of previous claims, characterized in that:
- each of said artificial dunes (30, 40) is placed, without any foundation structure, along a parallel direction to the shore-line, at a distance of 30-60 m,
so that it does not change the aesthetical landscape of the coast and does not create any obstacle to the normal use of the beach by tourists and residents.
PCT/IT2009/000369 2009-08-06 2009-08-06 System for prevention of erosion phenomena on the beach WO2011016068A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021091375A1 (en) * 2019-11-04 2021-05-14 Marine Innovations And Engineering B.V. Underwater modular structure, module of or for said underwater modular structure and method of constructing an underwater modular structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498805A (en) * 1983-11-29 1985-02-12 Weir Frederick E Breakwater module and means for protecting a shoreline therewith
JPS60141913A (en) * 1983-12-28 1985-07-27 Toa Harbor Works Co Ltd Manufacture and installation of ferro-concrete structure having curved surface
US4784521A (en) * 1987-02-03 1988-11-15 Martin David T Ocean diversion wall
US4818141A (en) * 1984-12-24 1989-04-04 Rauch Hans G Prefabricated erosion prevention wall
US5509755A (en) * 1993-12-27 1996-04-23 Olsen; Glenn C. Sand dune and shore-line erosion prevention system
GB2405169A (en) * 2003-08-22 2005-02-23 Joseph Toland Marine structure formed from clamped tyre beads

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498805A (en) * 1983-11-29 1985-02-12 Weir Frederick E Breakwater module and means for protecting a shoreline therewith
JPS60141913A (en) * 1983-12-28 1985-07-27 Toa Harbor Works Co Ltd Manufacture and installation of ferro-concrete structure having curved surface
US4818141A (en) * 1984-12-24 1989-04-04 Rauch Hans G Prefabricated erosion prevention wall
US4784521A (en) * 1987-02-03 1988-11-15 Martin David T Ocean diversion wall
US5509755A (en) * 1993-12-27 1996-04-23 Olsen; Glenn C. Sand dune and shore-line erosion prevention system
GB2405169A (en) * 2003-08-22 2005-02-23 Joseph Toland Marine structure formed from clamped tyre beads

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ASHLEY S: "PROTECTING BEACHES WITH ENGINEERED REEFS", MECHANICAL ENGINEERING, ASME. NEW YORK, US, vol. 116, no. 11, 1 November 1994 (1994-11-01), pages 150, XP000479953, ISSN: 0025-6501 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021091375A1 (en) * 2019-11-04 2021-05-14 Marine Innovations And Engineering B.V. Underwater modular structure, module of or for said underwater modular structure and method of constructing an underwater modular structure
NL2024156B1 (en) * 2019-11-04 2021-07-19 Marine Innovations And Eng B V Underwater modular structure, module of or for said underwater modular structure and method of constructing an underwater modular structure

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