EP0178510B1 - Device for delivering sand to coasts - Google Patents

Device for delivering sand to coasts Download PDF

Info

Publication number
EP0178510B1
EP0178510B1 EP19850112201 EP85112201A EP0178510B1 EP 0178510 B1 EP0178510 B1 EP 0178510B1 EP 19850112201 EP19850112201 EP 19850112201 EP 85112201 A EP85112201 A EP 85112201A EP 0178510 B1 EP0178510 B1 EP 0178510B1
Authority
EP
European Patent Office
Prior art keywords
components
flute
artificial reef
profile
curvature
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP19850112201
Other languages
German (de)
French (fr)
Other versions
EP0178510A3 (en
EP0178510A2 (en
Inventor
Günter Henkel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0178510A2 publication Critical patent/EP0178510A2/en
Publication of EP0178510A3 publication Critical patent/EP0178510A3/en
Application granted granted Critical
Publication of EP0178510B1 publication Critical patent/EP0178510B1/en
Expired legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to an artificial reef with features according to the preamble of claim 1.
  • Such a reef is known from US-A-2 069 715 and also from FR-A-1 019 527. It forms a flat wall on the seabed with a rounded cross-sectional contour, through which waves flowing against the shore are only deflected, but also accelerated.
  • sinkers made of tetrapods which are lowered into the water as breakwaters and surf dampers, have proven to be better on the ground in the water off the coast. Because of the rapid flow caused by the body shape, such sinkers are also not suitable for targeted sanding and sanding. The known sinkers are also not applicable to beaches and other economically used coastal areas. They therefore do not affect the idea of the invention.
  • An artificial reef with a throat-shaped inflow surface is known from FR-A-2 334 789, but this document shows a breakwater in which sanding is not wanted and is also not physically possible.
  • DE-A1-3331 563 also discloses a component for an artificial reef with a triangular cross section and throat-shaped surfaces.
  • the invention has for its object to achieve a targeted deposit, that is, above all a sand deposit, in the coastal area by forming an artificial reef, which favors the sedimentation of the solids carried by the water between the reef and the shore.
  • the invention solves this problem by the training features according to the characterizing part of patent claim 1.
  • This formation leads to a flow on the front side of the artificial reef in the inflow direction, in which the tear-off edge is particularly effective.
  • the deposits both in front of and behind the reef are considerably strengthened, as model tests have confirmed. This is due to the fact that the flow stall causes a turbulence and thereby a considerable reduction in speed, so that the entrained solids, in particular sand, sediment and settle on the bottom.
  • This formation leads to a special flow on the front side of the artificial reef in the inflow direction that the tear-off edge is particularly effective. It has been found that, depending on the inclination and nature of the bank and on the location of the artificial reef, deposits occur both in front of and behind the reef. The deposits occur in such large quantities that significant land reclamation takes place.
  • the production of the artificial reef from prefabricated components enables the arrangement of the artificial reef at any point in any length by simply stringing together such prefabricated components.
  • Several artificial reefs could also be arranged in rows one behind the other, transverse to the direction of flow of the water against the coast.
  • Another advantage is that with a corresponding amount of sanding achieved, a new artificial reef can be placed on the sanding achieved.
  • the device according to the invention is therefore particularly suitable for protecting beaches and dunes, but in particular for land reclamation in these areas. The desired effect is more pronounced in storms or storm surges. Even if the flow changes unexpectedly due to changes in the weather, the swirled deposits remain in the area of the artificial reef and are not washed away again.
  • the shape and design of the artificial reef even allow it to be arranged in the area of bathing beaches without there being any danger to beach visitors.
  • the device does not pose any danger to offshore shipping anyway. As a precaution, however, receiving openings for priggen and other shipping signs can be provided on the upper edge of the device.
  • an artificial reef To form an artificial reef, several structures 1 are placed in rows next to one another on the sea floor below the water surface 2. For safe positioning, a deposit on a base 4 made of a steel mesh, a wire mesh or another suitable material can be provided in adaptation to the base 3.
  • the structures to form the artificial reef can be deposited plane-parallel on the seabed 3, as shown on the left in FIG. 1, or with a certain inclination against the flow direction 5 of the water against the coast.
  • the offset formation of the parting joints 6 is recommended, as seen from the top view in Figure 2 shows so that shoulder projections prevent the displacement of the structure 1 against each other transversely to the longitudinal direction of the artificial reef.
  • a straight section 11 can be provided on the transition of the throat 9 into the counter-curvature 10, as is indicated in FIG. 1.
  • the most effective curvatures for the throat 9 and the counter-curvature 10 and for the formation of the section 11 can advantageously be determined empirically in each individual case in adaptation to the flow conditions and the local installation conditions.
  • FIGS. 5 and 6 schematically show further forms of embodiment for achieving the cavity 13 under the component 1 and for forming the support feet 12 causing this cavity.
  • FIG. 6 shows a cross-sectional profile; which is particularly suitable when weight-saving training is to be achieved. Reinforcements within the component 1 can ensure sufficient rigidity.
  • the components are advantageously produced from a suitable concrete mixture which is suitable for arrangement under water. From the drawing examples in connection with the description it follows that the arc shapes of the cross-sectional profile shown also have other degrees of curvature up to slightly curved to stretched forward, especially in partial areas, as has already been mentioned in the introduction.
  • mat underlays e.g. B. underfills or fillings with rubble, concrete, or solid foundations.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Revetment (AREA)

Description

Die Erfindung betrifft ein künstliches Riff mit Merkmalen nach dem Oberbegriff des Patentanspruches 1.The invention relates to an artificial reef with features according to the preamble of claim 1.

Ein solches Riff ist aus der US-A-2 069 715 und auch aus der FR-A-1 019 527 bekannt. Es bildet auf dem Meeresgrund einen flachen Wall mit einer abgerundeten Querschnittskontur, durch die gegen das Ufer strömende Wellen lediglich abgelenkt, dabei aber auch beschleunigt werden.Such a reef is known from US-A-2 069 715 and also from FR-A-1 019 527. It forms a flat wall on the seabed with a rounded cross-sectional contour, through which waves flowing against the shore are only deflected, but also accelerated.

Mit solchen Bauwerken wird auch der Zweck verfolgt, Erosionen im Küstenbereich, vor allem an Stränden, Dünen usw., zu erreichen. Es treten auch Ansandungen und andere Ablagerungen auf.The purpose of such structures is also to achieve erosion in the coastal area, especially on beaches, dunes, etc. Sanding and other deposits also occur.

Besser bewährt haben sich demgegenüber Senkkörper aus Tetrapoden, die als Wellenbrecher und Brandungsdämpfer in das Wasser gesenkt auf dem Grund im Wasser vor der Küste lagern. Wegen der durch die Körperform entstehenden Strömungsschnellen sind solche Senkkörper zur gezielten Versandung und Ansandung ebenfalls nicht geeignet. Die bekannten Senkkörper sind außerdem an Badestränden und anderen wirtschaftlich genutzten Küstenflächen nicht anwendbar. Sie berühren den Erfindungsgedanken daher nicht.On the other hand, sinkers made of tetrapods, which are lowered into the water as breakwaters and surf dampers, have proven to be better on the ground in the water off the coast. Because of the rapid flow caused by the body shape, such sinkers are also not suitable for targeted sanding and sanding. The known sinkers are also not applicable to beaches and other economically used coastal areas. They therefore do not affect the idea of the invention.

Ein künstliches Riff mit einer kehlförmigen Anströmfläche ist aus der FR-A-2 334 789 bekannt, jedoch zeigt diese Druckschrift einen Wellenbrecher, bei dem Ansandungen nicht gewollt und auch physikalisch nicht möglich sind. Auch die DE-A1-3331 563 offenbart ein Bauelement für ein künstliches Riff mit einem dreieckförmigen Querschnitt und kehlförmigen Flächen.An artificial reef with a throat-shaped inflow surface is known from FR-A-2 334 789, but this document shows a breakwater in which sanding is not wanted and is also not physically possible. DE-A1-3331 563 also discloses a component for an artificial reef with a triangular cross section and throat-shaped surfaces.

Der Erfindung liegt die Aufgabe zugrunde, im ufernahen Küstenbereich eine gezielte Ablagerung, das heißt vor allem eine Sandablagerung, durch eine Ausbildung eines künstlichen Riffs zu erreichen, die die Sedimentation der vom Wasser mitgeführten Feststoffe zwischen dem Riff und dem Ufer begünstigt.The invention has for its object to achieve a targeted deposit, that is, above all a sand deposit, in the coastal area by forming an artificial reef, which favors the sedimentation of the solids carried by the water between the reef and the shore.

Die Erfindung löst diese Aufgabe durch die Ausbildungsmerkmale nach dem Kennzeichen des Patentanspruches 1.The invention solves this problem by the training features according to the characterizing part of patent claim 1.

Diese Ausbildung führt zu einer Strömung an der in Anströmrichtung vorderen Seite des künstlichen Riffs, bei der die Abreißkante in besonderer Weise wirksam wird. Die Ablagerungen sowohl vor als auch hinter dem Riff werden dadurch erheblich verstärkt, wie Modellversuche bestätigt haben. Zurückzuführen ist dies darauf, daß durch den Strömungsabriß eine Verwirbelung und dadurch eine beträchtliche Geschwindigkeitsreduzierung eintritt, so daß die mitgeführten Feststoffe, insbesondere Sand, sedimentieren und sich auf dem Grund ablagern. Von besonderer Bedeutung für das Riff ist der Übergang der Kehle im Anströmbereich in eine konvexe Krümmung. Diese Ausbildung führt zu einer besonderen Strömung an der in Anströmrichtung vorderen Seite des künstlichen Riffs, daß die Abreißkante in besonderer Weise wirksam wird. Es hat sich herausgestellt, daß je nach Neigung und Beschaffenheit des Gestades am Ufer und nach Lage des künstlichen Riffs Ablagerungen sowohl vor als auch hinter dem Riff stattfinden. Die Ablagerungen treten dabei in so großen Mengen auf, daß eine nennenswerte Landgewinnung erfolgt.This formation leads to a flow on the front side of the artificial reef in the inflow direction, in which the tear-off edge is particularly effective. The deposits both in front of and behind the reef are considerably strengthened, as model tests have confirmed. This is due to the fact that the flow stall causes a turbulence and thereby a considerable reduction in speed, so that the entrained solids, in particular sand, sediment and settle on the bottom. Of particular importance for the reef is the transition of the throat in the inflow area into a convex curvature. This formation leads to a special flow on the front side of the artificial reef in the inflow direction that the tear-off edge is particularly effective. It has been found that, depending on the inclination and nature of the bank and on the location of the artificial reef, deposits occur both in front of and behind the reef. The deposits occur in such large quantities that significant land reclamation takes place.

Die Herstellung des künstlichen Riffs aus vorgefertigten Bauelementen ermöglicht die Anordnung des künstlichen Riffs an beliebigen Stellen in beliebiger Länge durch einfaches Aneinanderreihen solcher vorgefertigten Bauelemente. Auch mehrere künstliche Riffs könnten in Reihen hintereinander quer zur Strömungsrichtung des Wassers gegen die Küste angeordnet werden. Ein weiterer Vorteil besteht darin, daß bei einer entsprechenden Höhe der erzielten Ansandung ein neues künstliches Riff auf die erzielte Ansandung aufgesetzt werden kann. Die erfindungsgemäße Vorrichtung eignet sich daher besonders zum Schutz von Stränden und Dünen, insbesondere aber zur Landgewinnung in diesen Bereichen. Die angestrebte Wirkung tritt verstärkt bei Sturm oder Sturmfluten ein. Selbst bei unerwarteter Strömungsänderung durch Veränderung der Wetterlage verbleiben die aufgewirbelten Ablagerungen im Bereich des künstlichen Riffs und werden nicht wieder fortgeschwemmt. Form und Ausführungsart des künstlichen Riffs erlauben sogar die Anordnung im Bereich von Badestränden, ohne daß eine Gefahr für die Strandbesucher besteht. Eine Gefahr für die küstennahe Schiffahrt stellt die Vorrichtung ohnehin nicht dar. Vorsorglich können jedoch an der Oberkante der Vorrichtung Aufnahmeöffnungen für Priggen und andere Schiffahrtszeichen vorgesehen sein.The production of the artificial reef from prefabricated components enables the arrangement of the artificial reef at any point in any length by simply stringing together such prefabricated components. Several artificial reefs could also be arranged in rows one behind the other, transverse to the direction of flow of the water against the coast. Another advantage is that with a corresponding amount of sanding achieved, a new artificial reef can be placed on the sanding achieved. The device according to the invention is therefore particularly suitable for protecting beaches and dunes, but in particular for land reclamation in these areas. The desired effect is more pronounced in storms or storm surges. Even if the flow changes unexpectedly due to changes in the weather, the swirled deposits remain in the area of the artificial reef and are not washed away again. The shape and design of the artificial reef even allow it to be arranged in the area of bathing beaches without there being any danger to beach visitors. The device does not pose any danger to offshore shipping anyway. As a precaution, however, receiving openings for priggen and other shipping signs can be provided on the upper edge of the device.

Auf der Zeichnung sind einige Ausführungsformen schematisch dargestellt. Es zeigen

  • Figur 1 schematisch den Aufbau eines künstlichen Riffs in Seitenansicht,
  • Figur 2 eine Draufsicht auf einen Teilbereich eines künstlichen Riffs,
  • Figur 3 einen Teilschnitt nach der Linie 111 bis 111 der Figur 2 und
  • Figuren 4 bis 6 verschiedene Profilformen für den Querschnitt der Baukörper.
Some embodiments are shown schematically in the drawing. Show it
  • FIG. 1 shows a schematic side view of the structure of an artificial reef,
  • FIG. 2 shows a plan view of a partial area of an artificial reef,
  • 3 shows a partial section along the line 111 to 111 of Figure 2 and
  • Figures 4 to 6 different profile shapes for the cross section of the building.

Zur Bildung eines künstlichen Riffs werden mehrere Baukörper 1 in Reihen nebeneinander auf dem Meeresgrund unterhalb der Wasseroberfläche 2 abgelegt. Zur sicheren Positionierung kann in Anpassung an den Untergrund 3 eine Ablagerung auf einer Unterlage 4 aus einem Stahlgewebe, einem Drahtgeflecht oder einem anderen geeigneten Werkstoff vorgesehen sein. Die Ablage der Baukörper zur Bildung des künstlichen Riffs kann planparallel auf dem Meeresboden 3 erfolgen, wie es links in der Figur 1 dargestellt ist oder auch mit einer gewissen Anstellung gegen die Strömungsrichtung 5 des Wassers gegen die Küste. Zur Verbindung der Baukörper 1 untereinander empfiehlt sich die versetzte Ausbildung der Teilfugen 6, wie es aus der Draufsicht in Figur 2 hervorgeht, so daß Schultervorsprünge die Verschiebung der Baukörper 1 gegeneinander quer zur Längsrichtung des künstlichen Riffs verhindern. Außerdem ist es vorteilhaft, im Bereich dieser Teilfugen der Bauelemente Vorsprünge und korrespondierende Ausnehmungen mit geneigten unteren Begrenzungsflächen 7 auszubilden, auf denen die Bauelemente 1 durch ihr Eigengewicht zusammenhaltend belastet werden, wie es schematisch in der Figur 3 angedeutet ist. Für das Querschnittsprofil der Bauelemente 1 empfiehlt sich eine spiegelbildliche Ausbildung, wie sie beispielsweise in den Figuren 4 bis 6 dargestellt ist. Gezeigt wird ein dreieckförmiges Querschnittsprofil mit einer nach oben gerichteten Spitze 8, die die Abreißkante der Strömung beim Überströmen des künstlichen Riffs bildet. Von dieser oberen Abreißkante 8 ist das Querschnittsprofil nach beiden Seiten abfallend mit einer Kehle 9 ausgebildet, die nach unten mittelbar oder unmittelbar allmählich in eine konvexe Gegenkrümmung 10 übergeht. Obwohl die angestrebte Wirkung bereits bei einer stetigen Krümmung der Kehle 9 eintritt, empfiehlt sich, wenigstens auf der in Strömung vorderen Seite eine Kehle auszubilden, deren Krümmung nach oben zur Abreißkante 8 geringer wird. Auf der gegenüberliegenden Rückseite kommt der vorgegebenen Krümmung in der Kehle 9 und in der Gegenkrümmung 10 keine so entscheidende Bedeutung bei, so daß hier ein weiterer Spielraum für die Gestaltung vorhanden ist. Aus Gründen einer ökonomischen Herstellung empfiehlt sich jedoch die spiegelbildliche Ausbildung. Am Obergang der Kehle 9 in die Gegenkrümmung 10 kann ein gerades Teilstück 11 vorgesehen sein, wie es in Figur 1 angedeutet ist. Die wirksamsten Krümmungen für die Kehle 9 und die Gegenkrümmung 10 und für die Ausbildung des Teilstückes 11 sind in Anpassung an die Strömungsverhältnisse und an die örtlichen Einbauverhältnisse vorteilhaft in jedem Einzelfalle empirisch zu ermitteln. Die Gegenkrümmungen 10 gehen mit ihrem unteren Auslauf in eine Profilkante eines Stützfußes 12 über, so daß unter dem Bauelement 1 ein Hohlraum 13 gebildet ist, wenn das Bauelement auf den Grund abgesenkt wird. Diese Ausbildung bewirkt eine festere Lage auf dem Grund unter der Wasseroberfläche. Die Figuren 5 und 6 zeigen schematisch weitere Ausbildungsformen zur Erzielung des Hohlraumes 13 unter dem Bauelement 1 und zur Bildung der diesen Hohlraum bewirkenden Stützfüße 12. Die Figur 6 zeigt dabei ein Querschnittsprofil; welches sich besonders eignet, wenn eine gewichtssparende Ausbildung erzielt werden soll. Armierungen innerhalb des Bauelementes 1 können dabei für eine hinreichende Steifigkeit sorgen. Die Herstellung der Bauelemente erfolgt vorteilhaft aus einer geeigneten Betonmischung, die für die Anordnung unter Wasser geeignet ist. Aus den Zeichnungsbeispielen in Verbindung mit der Beschreibung ergibt sich, daß die dargestellten Bogenformen des Querschnittsprofils auch andere Krümmungsgrade bis hin zu schwach gekrümmtem bis gestrecktem Vorlauf, vor allem in Teilbereichen, wie es schon einleitend erwähnt worden ist.To form an artificial reef, several structures 1 are placed in rows next to one another on the sea floor below the water surface 2. For safe positioning, a deposit on a base 4 made of a steel mesh, a wire mesh or another suitable material can be provided in adaptation to the base 3. The structures to form the artificial reef can be deposited plane-parallel on the seabed 3, as shown on the left in FIG. 1, or with a certain inclination against the flow direction 5 of the water against the coast. To connect the structures 1 to one another, the offset formation of the parting joints 6 is recommended, as seen from the top view in Figure 2 shows so that shoulder projections prevent the displacement of the structure 1 against each other transversely to the longitudinal direction of the artificial reef. In addition, it is advantageous to form projections and corresponding recesses with inclined lower boundary surfaces 7 in the area of these parting lines of the components, on which the components 1 are held together by their own weight, as is indicated schematically in FIG. 3. For the cross-sectional profile of the components 1, a mirror-image formation is recommended, as is shown, for example, in FIGS. 4 to 6. Shown is a triangular cross-sectional profile with an upward point 8, which forms the tear-off edge of the flow when flowing over the artificial reef. From this upper tear-off edge 8, the cross-sectional profile is designed to drop off on both sides with a groove 9, which passes indirectly or immediately gradually downwards into a convex counter-curvature 10. Although the desired effect already occurs with a constant curvature of the throat 9, it is advisable to form a throat at least on the front side in the flow, the curvature of which becomes smaller towards the tear-off edge 8. On the opposite back, the given curvature in the throat 9 and in the counter-curvature 10 is not so important, so that there is further scope for the design. For economic production reasons, however, the mirror image training is recommended. A straight section 11 can be provided on the transition of the throat 9 into the counter-curvature 10, as is indicated in FIG. 1. The most effective curvatures for the throat 9 and the counter-curvature 10 and for the formation of the section 11 can advantageously be determined empirically in each individual case in adaptation to the flow conditions and the local installation conditions. The counter curves 10 go with their lower outlet into a profile edge of a support leg 12, so that a cavity 13 is formed under the component 1 when the component is lowered to the bottom. This training creates a firmer position on the ground below the water surface. FIGS. 5 and 6 schematically show further forms of embodiment for achieving the cavity 13 under the component 1 and for forming the support feet 12 causing this cavity. FIG. 6 shows a cross-sectional profile; which is particularly suitable when weight-saving training is to be achieved. Reinforcements within the component 1 can ensure sufficient rigidity. The components are advantageously produced from a suitable concrete mixture which is suitable for arrangement under water. From the drawing examples in connection with the description it follows that the arc shapes of the cross-sectional profile shown also have other degrees of curvature up to slightly curved to stretched forward, especially in partial areas, as has already been mentioned in the introduction.

Für die Erhöhung der Standfestigkeit der Bauelemente sind auch andere Vorkehrungen als Mattenunterlagen verwendbar, z. B. Unterschüttungen oder Einschüttungen mit Geröll, Beton, oder auch feste Fundamentierungen.To increase the stability of the components, other measures can also be used as mat underlays, e.g. B. underfills or fillings with rubble, concrete, or solid foundations.

Claims (4)

1. Artificial reef for sanding coasts, which is assembled transverse to the main direction of current beneath the water surface (2) from prefabricated components (1) with a triangular crosssectional profile, of which one profile edge (8) is directed upwardly, characterized in that the upper profile edge (8) is sharp-edged and the surfaces falling away therefrom are fluted, the flute (9) on the front side facing the open water merging below into a contour of convex curvature (10), on which there is a profile edge forming a support foot (12).
2. Device according to claim 1, characterized in that the curvature of the flute (9) on the front side in the current direction of the crosssectional profile decreases from below upwardly.
3. Device according to claims 1 and 2, characterized in that a flat surface region (11) is merged in between the flute (9) and the countercurvature (10).
4. Device according to the preceding claims, characterized in that projections and corresponding recesses with inclined lower boundary, surfaces (7) are provided at the joints (6) between the components (1), whereat the components (1) are loaded to hold together by their own weight.
EP19850112201 1984-10-18 1985-09-26 Device for delivering sand to coasts Expired EP0178510B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843438204 DE3438204A1 (en) 1984-10-18 1984-10-18 DEVICE FOR SANDING ON COAST
DE3438204 1984-10-18

Publications (3)

Publication Number Publication Date
EP0178510A2 EP0178510A2 (en) 1986-04-23
EP0178510A3 EP0178510A3 (en) 1986-12-30
EP0178510B1 true EP0178510B1 (en) 1989-08-30

Family

ID=6248212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850112201 Expired EP0178510B1 (en) 1984-10-18 1985-09-26 Device for delivering sand to coasts

Country Status (2)

Country Link
EP (1) EP0178510B1 (en)
DE (1) DE3438204A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818141A (en) * 1984-12-24 1989-04-04 Rauch Hans G Prefabricated erosion prevention wall
FR2598162B1 (en) * 1986-04-30 1988-08-12 Staempfli Alexandre RIB FOR STRENGTHENING FRIABLE LAND
DE3624009A1 (en) * 1986-07-16 1988-01-28 Hupfeld Beton Gmbh & Co Coastal protection element
US5102257A (en) * 1990-03-30 1992-04-07 Richard E. Creter Breakwater
US5267812A (en) * 1991-03-30 1993-12-07 Hazama Corporation Upwelling-generating structure
JPH1054019A (en) * 1996-08-09 1998-02-24 Soken Kogyo Kk Artificial sands nourishment method of seashore making use of lattice-like frame wave dissipation construction material and construction method thereof
US5924820A (en) * 1997-02-26 1999-07-20 Creter; Richard E. Anti-scour device and method for scour prevention
ATE242365T1 (en) * 1998-08-07 2003-06-15 Alethea Rosalind Melanie Hall METHOD FOR FORMING AN ARTIFICIAL REEF UNIT
CN109267533B (en) * 2018-11-08 2024-02-06 浙江省水利河口研究院(浙江省海洋规划设计研究院) Sand adding device for underwater layering of estuary coastal sediment physical model
US11359345B2 (en) * 2020-05-07 2022-06-14 Hercules Eco, LLC Sediment control system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2069715A (en) * 1935-10-29 1937-02-02 Beach Erosion Control Company Artificial reef
FR1019527A (en) * 1950-06-06 1953-01-22 Underwater dam changing a large and medium pebble beach into a beach of very small pebbles or sand and widening any beach by moving its shore
US3733831A (en) * 1971-03-12 1973-05-22 Gray Tech Ind Inc Method and apparatus for preventing erosion and for conveying
DE2120256C3 (en) * 1971-04-26 1973-10-04 Allgemeine Strassenbaubedarfs-Gesellschaft Mbh, 2820 Bremen Shaped stone for the manufacture of water protection structures
FR2334789A1 (en) * 1975-12-10 1977-07-08 Moncade Noel Sea wall for protecting sea shores - has wide base concrete elements anchored in seabed with shaped top and staggered openings for water passage
US4129006A (en) * 1977-05-19 1978-12-12 Sylvia M. Payne Modular erosion control system
FR2476712A1 (en) * 1979-12-26 1981-08-28 Staempfli Alexandre Triangular cross section hollow groyne - has sets of three rectangular section sparred beams to build triangular frame
DE3001305C2 (en) * 1980-01-16 1985-04-04 Friedrich 2280 Westerland Böck Prefabricated part made of reinforced concrete for coastal protection and an outrigger boat for laying the prefabricated parts
DE8325155U1 (en) * 1983-09-01 1984-05-30 Henkel, Günter, 2800 Bremen FLOW ELEMENT AS A PRE-PREPARED BUILDING BODY FOR COAST PROTECTION
DE3331563C2 (en) * 1983-09-01 1994-10-13 Guenter Henkel Flow element as a prefabricated structure for coastal protection

Also Published As

Publication number Publication date
DE3438204A1 (en) 1986-04-24
EP0178510A3 (en) 1986-12-30
EP0178510A2 (en) 1986-04-23

Similar Documents

Publication Publication Date Title
DE2731228C2 (en) Concrete shaped stone for the production of a retaining wall and retaining wall made of such shaped stones
EP0178510B1 (en) Device for delivering sand to coasts
DE1658441C3 (en) Concrete superstructure for traffic routes
DE1012319B (en) Wire fence that can be used as a snow fence
EP0901540B1 (en) Fish ladder and its construction
DE3422888C1 (en) Device for damping surface waves, in particular for protecting floating or solid structures or coasts
DE69333376T2 (en) Device for scattering wave energy
DE1909799A1 (en) Breakwater
CH665442A5 (en) EMBANKMENT ELEMENT.
DE3106486C2 (en) Noise barrier
EP0116153A1 (en) Protective device for reducing wind velocity
DE2532520C3 (en) Protection device, in particular soundproofing device and slope fastening for roads, consisting of prefabricated components made of artificial stone, concrete or the like
DE3331563C2 (en) Flow element as a prefabricated structure for coastal protection
DE2908077C2 (en)
AT368222B (en) WATER CONSTRUCTION
DE3212411A1 (en) Riprap permeable to water
DE69529211T2 (en) Artificial reef facility
EP0115553B1 (en) Arrangement for the reduction of the erosive influence of rough waters on the marginal surfaces between water and land and/or for the reclamation of land
DE33072C (en) Interlocking tiles with transverse rabbets running continuously at the same height through the entire length of the roof
DE102017108979B3 (en) Breakwater device for coastal and shore protection
DE102016111780A1 (en) Raft-like device
DE2518199A1 (en) Erosion protection nets for sea shore bottom - are held on posts for reducing energy of breaking waves
AT350000B (en) CLEANING RAKE FOR CLEANING RAKES FOR HYDROPOWER, WATER PURIFICATION PLANTS OR DGL.
DE1784327C (en) Element for bank reinforcement
DE8011934U1 (en) Precast concrete part for the construction of noise barriers in road construction

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): FR GB IT NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): FR GB IT NL

17P Request for examination filed

Effective date: 19870619

17Q First examination report despatched

Effective date: 19880601

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): FR GB IT NL

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO ROMA S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980824

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980917

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19980930

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990926

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990926

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000531

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20000401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST