EP1165894A1 - Schildblock mit rauher oberfläche - Google Patents

Schildblock mit rauher oberfläche

Info

Publication number
EP1165894A1
EP1165894A1 EP00911004A EP00911004A EP1165894A1 EP 1165894 A1 EP1165894 A1 EP 1165894A1 EP 00911004 A EP00911004 A EP 00911004A EP 00911004 A EP00911004 A EP 00911004A EP 1165894 A1 EP1165894 A1 EP 1165894A1
Authority
EP
European Patent Office
Prior art keywords
faces
block
legs
lateral
core
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.)
Granted
Application number
EP00911004A
Other languages
English (en)
French (fr)
Other versions
EP1165894B1 (de
Inventor
Michel Denechere
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.)
ARTELIA EAU & ENVIRONNEMENT
Original Assignee
Societe Grenobloise dEtudes et dApplications Hydrauliques SA SOGREAH
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 Societe Grenobloise dEtudes et dApplications Hydrauliques SA SOGREAH filed Critical Societe Grenobloise dEtudes et dApplications Hydrauliques SA SOGREAH
Publication of EP1165894A1 publication Critical patent/EP1165894A1/de
Application granted granted Critical
Publication of EP1165894B1 publication Critical patent/EP1165894B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/129—Polyhedrons, tetrapods or similar bodies, whether or not threaded on strings

Definitions

  • the invention relates to an artificial shell block for the realization of maritime and river protection works such as jetties, groynes, submarine reefs, breakwaters detached breakwaters of solid land and coastal road dykes in rivers, protection of banks etc.
  • an artificial block is already known from patent document FR-2547135
  • This known block comprises a central core having a first and a second opposite face each provided with an anvil-shaped side leg, each anvil-shaped side leg having a table, two inclined sides and two side faces, the tables said lateral legs being arranged parallel to each other and parallel to said first and second opposite faces of the core, the inclined faces of said lateral legs pressing on third and fourth apparent and opposite faces of said core said core having a fifth and a sixth opposite face and each provided with a front leg in the form of a trunk of a pyramid having four lateral faces and a frontal face parallel to said fifth and sixth faces of the core and to the lateral faces of the lateral legs, two of the opposite lateral faces of each front leg shaped pyramid trunk resting in overlap on the lateral faces of the lateral legs
  • Such a block has great qualities of robustness and hydraulic stability
  • robustness is meant the ability of the block to have good mechanical resistance to shocks and internal stresses
  • the lateral faces of the anvil-shaped lateral legs are further provided with grooves parallel and perpendicular to the plane of the tables of the lateral legs, which makes it possible to increase the individual stability of the block by increasing the power of hooking of the block with neighboring blocks and further improving the hydrodynamic resistance due to the roughness of the external surface of the block.
  • the object of the invention is to propose a solution to further improve the qualities of stability and attachment of such an artificial block whatever the orientation of the blocks.
  • the subject of the invention is a shell block for the production of maritime and river protection works, having an external surface defining portions of surface which are parallel and opposite with respect to a transverse plane of the block, said block being inscribed in a cube having a side of length H, characterized in that said surface portions have a rough surface formed by a multitude of frustoconical protuberances, each frustoconical protuberance having a height of between 0.005H and 0.1 H.
  • pyramidal protrusions are placed on the lateral faces of the lateral legs and on the front faces of the frontal legs.
  • This particular shape of the rough surface of the block according to the invention gives it increased stability by increasing the points of contact with the neighboring blocks and increased hooking power both at the lateral faces of the lateral tabs and at the faces. frontal of the frontal legs. It also allows a very efficient dissipation of energy.
  • the presence of the pyramidal protrusions on these lateral and frontal faces, respectively of the lateral and frontal legs furthermore makes it possible to fix the marine flora and fauna on the immersed blocks.
  • a multitude of recesses and / or protuberances are distributed over a contour of the external surface of the block coincident with said transverse plane of the block which may be a plane of symmetry.
  • the tables of the lateral legs also have, in their middle part, a transverse recess.
  • the angle edges of the lateral and front legs are chamfered.
  • the transverse recesses formed in the tables of the lateral legs and the chamfering of the corner stops of the lateral and front legs promote the mutual nesting of the biocs and therefore their attachment. They also facilitate the installation of the blocks.
  • the invention extends to a mold for the manufacture of a block according to the invention.
  • Figure 1 is a schematic perspective view of a block according to the invention.
  • Figure 2 is a detailed perspective view of a set of pyramidal protrusions according to the invention.
  • Figure 3 is a sectional view of a half-shell of a mold for the manufacture of a block according to the invention.
  • the block shown diagrammatically in perspective in FIG. 1 is obtained by a single pouring of concrete in an appropriate mold.
  • the block is inscribed in a cube having a dimension of length H; this length will be taken into account later because it serves as a reference for the different dimensions of the frustoconical protrusions forming the rough surface of the block.
  • the shape of the block of the invention is established around a central core 1, for example of generally cubic shape, having a first and a second opposite face 11 and 12, a third and a fourth face opposite 13 and 14, partially visible, and a fifth and sixth opposite face 15 and 16.
  • Each of the first and second faces 11 and 12 serves to support an anvil-shaped side tab; these lateral tabs referenced 21 and 22 each include a table 21A and 22A parallel to the faces 11 and 12 of the core and the lateral faces 21 B, 21 C (not visible in FIG. 1) and 22B, 22C (not visible in the figure 1) parallel to the faces 15 and 16 of the core.
  • Tables 21 A and 22A are parallel to each other.
  • the block has a plane of symmetry P which intersects the faces 11 and 12.
  • each anvil-shaped lateral tab 21, 22 have end facets 21 D and 21 F, 22D and
  • each front tab which only one 31 is visible in FIG. 1.
  • Each front tab such as 31 has a general shape in the trunk of a pyramid having four lateral faces and one face frontal parallel to the faces 15 and 16 of the core.
  • the lateral faces of the trunk of the pyramid form an angular angle between 20 and 28 degrees with the longitudinal axis of the pyramid: two opposite lateral faces 31 A and 32A of the front tab 31, overlap on the lateral faces 21 B and 22B anvil-shaped side legs to increase the robustness of the block.
  • This overlap is made by a plane leave and is identical for the front leg not visible in FIG. 1.
  • the table of each lateral leg in the shape of an anvil has a transverse notch 34.35 extending over the entire width of the table . This arrangement improves the ability of the block to hang stably on the riprap layer; it also makes it possible to promote the flow between the shell and the undercoat to reduce the destabilizing hydrodynamic stresses. Finally, it promotes the interpenetration of the blocks into each other, which strengthens the cohesion of the shell.
  • the lateral faces 21 B and 21 C, 22B and 22C of the lateral tabs 21, 22 and the front face 33 of each front tab such as 31 have a rough surface formed by a multitude of frustoconical protrusions and here pyramidal 40 which contributes to reinforce the ability of the block to hook and tighten the shell (due to the reduction in oscillations).
  • pyramidal protrusions are preferably all identical, form an integral part of the block and are produced by molding during the pouring of the concrete. They are arranged in a row and in diagonal columns, contiguously.
  • Each protuberance shown in more detail in Figure 2 has a height between 0.005H and 0.1H, preferably between 0.01H and 0.05H. Tests have shown that the best hanging capacity was obtained for a height of 0.03H.
  • These pyramidal protrusions are not too protruding to resist shocks and to facilitate the formwork removal.
  • Each protuberance is preferably pyramidal with a polygonal base and in particular square with each side having a length of about 0.08H
  • each pyramidal protuberance 40 extends along its longitudinal axis perpendicular to the opposite faces 15 and 16 of the core to facilitate the mold release operations as indicated below
  • the facets of the block which are intersecting on the faces 15 and 16 of the core are not provided with such pyramidal protrusions
  • recesses and / or protuberances 50 are distributed over the contour of the external surface of the block which coincides with the plane of symmetry of the block. These recesses and / or protuberances 50 also have a frustoconical shape and dimensions identical to those of the protrusions 40
  • the mold used for the manufacture of the block by pouring concrete may advantageously be a metallic mold, made of high performance concrete or any other molding material, constituted by the assembly of two half-shells symmetrical with respect to the longitudinal median plane of the legs lateral 21, 22 (HERE the plane P parallel to the faces 15 and 16 of the core) These two half-shells are mounted contiguous and separable in the plane of symmetry P of the block As the release of the block is done by separation of the two half-shells in a direction perpendicular to the median plane P of the lateral tabs and therefore of the faces 15 and 16 of the core, the protrusions 40 formed on the surface of the block and the recesses and / or protuberances 50 formed on the contour of the block in the plane P n ' offer no resistance to separation of half shells
  • the interior surface of the two half-shells presents a relief with recesses and / or protuberances identical and complementary to those and / or to those which are formed on the surface of the block
  • These recesses and / or protuberances, for example pyramidal, on the inner surface of the mold half-shells are formed, in the case of a metal mold for example, by welding of precut sheets in the form of rhombus and pheas in half and welded
  • a half-shell 60 of the mold is illustrated in FIG.
  • FIG. 3 in cross section perpendicular to the plane P
  • recesses 61 on the inner surface of the half-shell 60 of a shape complementary to the protrusions 40 on the block.
  • protrusions 62 on the inner surface of the half-shell 60 of complementary shape to the recesses 50 on the block.
  • the invention applies to the production of works, in particular of carapaces of works, by depositing blocks in one or more layers, preferably by seeking to vary the attitude of the blocks in order to favor their nesting.
  • the blocks made of unreinforced concrete by molding, have a dimension H of between 0.75m and several meters.
  • the rough surface of the blocks according to the invention also reduces the unfavorable impression resulting from the mirror effect of large flat faces.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Revetment (AREA)
  • Materials For Medical Uses (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Prostheses (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Toys (AREA)
  • Artificial Fish Reefs (AREA)
  • Road Signs Or Road Markings (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
EP00911004A 1999-03-22 2000-03-20 Schildblock mit rauher oberfläche Expired - Lifetime EP1165894B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9903528A FR2791370B1 (fr) 1999-03-22 1999-03-22 Bloc de carapace a surface rugueuse
FR9903528 1999-03-22
PCT/FR2000/000689 WO2000056981A1 (fr) 1999-03-22 2000-03-20 Bloc de carapace a surface rugueuse

Publications (2)

Publication Number Publication Date
EP1165894A1 true EP1165894A1 (de) 2002-01-02
EP1165894B1 EP1165894B1 (de) 2003-02-05

Family

ID=9543475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00911004A Expired - Lifetime EP1165894B1 (de) 1999-03-22 2000-03-20 Schildblock mit rauher oberfläche

Country Status (12)

Country Link
EP (1) EP1165894B1 (de)
CN (1) CN1144914C (de)
AT (1) ATE232256T1 (de)
AU (1) AU3301200A (de)
BR (2) BRMU8003354Y1 (de)
DE (1) DE60001361D1 (de)
ES (1) ES2190405T3 (de)
FR (1) FR2791370B1 (de)
HK (1) HK1044809B (de)
TN (1) TNSN00056A1 (de)
WO (1) WO2000056981A1 (de)
ZA (1) ZA200107144B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018052292A1 (en) 2016-09-14 2018-03-22 Koninklijke Bam Groep N.V. Cover element of concrete for a breakwater or jetty construction, as well as breakwater or jetty construction provided with a plurality of such elements
US10443206B2 (en) 2011-01-10 2019-10-15 Stable Concrete Structures, Inc. Block reinforcement cage having stem reinforcement portions with open apertures formed therein, for use in reinforcing a molded concrete U-wall construction block

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9644334B2 (en) 2013-08-19 2017-05-09 Stable Concrete Structures, Inc. Methods of and systems for controlling water flow, breaking water waves and reducing surface erosion along rivers, streams, waterways and coastal regions
FR3078984B1 (fr) 2018-03-19 2022-05-13 Artelia Eau Et Environnement Bloc de beton ajoure pour enrochement
FR3107135B1 (fr) 2020-02-07 2022-01-14 Idocean Procédé de construction d’une représentation tridimensionnelle virtuelle d’une carapace de digue
FR3118973A1 (fr) 2021-01-20 2022-07-22 Soletanche Freyssinet Méthode de suivi du déplacement de blocs préfabriqués d’une carapace d’une digue
WO2023011738A1 (en) 2021-08-06 2023-02-09 Koninklijke Bam Groep N.V. River training structure, system comprising river training structure, and method for training a river

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2476179A1 (fr) * 1980-02-19 1981-08-21 Lena Alex Di Jeu d'elements de construction pour mur de soutenement
US4362432A (en) * 1980-03-03 1982-12-07 Conover Maria T Fluid wave energy dissipating and absorbing structure
JPS5754609A (en) * 1980-09-16 1982-04-01 Nippon Soohan Kk Off-shore bank
US4575646A (en) 1983-06-02 1986-03-11 At&T Bell Laboratories High-speed buffer arrangement with no delay distortion
FR2647135B1 (fr) * 1989-05-22 1991-07-05 Sogreah Bloc artificiel notamment pour la realisation d'ouvrages de protection maritime et fluviale

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0056981A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10443206B2 (en) 2011-01-10 2019-10-15 Stable Concrete Structures, Inc. Block reinforcement cage having stem reinforcement portions with open apertures formed therein, for use in reinforcing a molded concrete U-wall construction block
WO2018052292A1 (en) 2016-09-14 2018-03-22 Koninklijke Bam Groep N.V. Cover element of concrete for a breakwater or jetty construction, as well as breakwater or jetty construction provided with a plurality of such elements

Also Published As

Publication number Publication date
WO2000056981A1 (fr) 2000-09-28
HK1044809A1 (en) 2002-11-01
HK1044809B (zh) 2004-10-21
DE60001361D1 (de) 2003-03-13
CN1344342A (zh) 2002-04-10
EP1165894B1 (de) 2003-02-05
BRMU8003354Y1 (pt) 2019-01-22
TNSN00056A1 (fr) 2002-05-30
FR2791370B1 (fr) 2001-05-25
CN1144914C (zh) 2004-04-07
BR0009190A (pt) 2001-12-18
ATE232256T1 (de) 2003-02-15
ZA200107144B (en) 2002-10-30
ES2190405T3 (es) 2003-08-01
FR2791370A1 (fr) 2000-09-29
AU3301200A (en) 2000-10-09

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