EP0803612A1 - In einem Stück gegossener Betonschutzblock, Giessform zur Herstellung desselben - Google Patents

In einem Stück gegossener Betonschutzblock, Giessform zur Herstellung desselben Download PDF

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Publication number
EP0803612A1
EP0803612A1 EP97400883A EP97400883A EP0803612A1 EP 0803612 A1 EP0803612 A1 EP 0803612A1 EP 97400883 A EP97400883 A EP 97400883A EP 97400883 A EP97400883 A EP 97400883A EP 0803612 A1 EP0803612 A1 EP 0803612A1
Authority
EP
European Patent Office
Prior art keywords
block
grooves
protuberances
blocks
smooth
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
EP97400883A
Other languages
English (en)
French (fr)
Other versions
EP0803612B1 (de
Inventor
Michel Denechere
Louis Sanchez
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.)
Societe Grenobloise dEtudes et dApplications Hydrauliques SA SOGREAH
Original Assignee
SOGELERG-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 SOGELERG-SOGREAH filed Critical SOGELERG-SOGREAH
Publication of EP0803612A1 publication Critical patent/EP0803612A1/de
Application granted granted Critical
Publication of EP0803612B1 publication Critical patent/EP0803612B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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 a one-piece molded concrete shell block for a structure for protecting maritime and fluvial structures against waves and currents, and a mold for making such a block.
  • the technical characteristics sought in terms of artificial blocks are firstly hydraulic stability and secondly robustness.
  • the goal of block designers is to reduce the volume of concrete required for a given shell while having stability and robustness in accordance with their use. For this, the designers play on the dimensions and the angles of the constituent parts of the block in order to increase the volume of the empty spaces between nested blocks.
  • the resulting blocks give a significant concrete saving result. However they are less robust and because of this, in the long term, there may appear in the shell a covering defect causing, due to the broken blocks settling, exposing part of the maritime and fluvial works and being able to be at the origin of damage.
  • NL-A-8903138 relates to a shell block of molded concrete.
  • the aim of this document is to compensate for the fragility of the blocks by a device aimed at reducing the maximum collision force exerted on a block by the other surrounding blocks.
  • the proposed solution is to provide the shell block in molded concrete with a surface layer, in asphalt, rubber, or even in cement-rubber composite, of lower rigidity than the shell block. Thus the shocks between blocks are absorbed.
  • this surface layer can advantageously, and for the same purpose, have projections or edges made of wood, rubber or concrete to make the surface layer less rigid than the block it covers.
  • One of the aims of the present invention is therefore to preserve the optimal dimensional ratios of the existing blocks and to produce on the block surfaces an irregular uneven relief, without influence on the structural strength, constituting a plurality of asperities.
  • an isotropic improvement in the attachment is obtained.
  • the present invention is completely opposed to the general idea according to which, in order to facilitate its manufacture, and in particular demoulding, the shell blocks in one-piece molded concrete must have a smooth outer skin originating from molding, with possibly, as in NL-A-8903138 an added surface layer.
  • the invention therefore relates to a one-piece molded concrete shell block for the protection structure of maritime and river works having an exterior surface of general shape defining a smooth polyhedron.
  • at least part of the external surface of the block has protuberances and / or grooves molded in the mass of the block, the protuberances and / or grooves having faces in planes secant to the general local plane of the smooth polyhedron , these protuberances and / or grooves together forming an irregular uneven relief.
  • the irregular uneven terrain makes it possible to increase the bonding coefficient between blocks in all directions (isotropic), and therefore to raise the coefficient of hydraulic stability.
  • the coefficient of attachment being increased, the elementary inertia of the block (mass of concrete for a block) can be reduced, the reduction in the mass of each block being compensated for by the best attachment between blocks. This allows a saving of concrete on the realization of a given surface of shell.
  • the faces of the protrusions and / or of the grooves are as many secondary planes with different orientations which multiply the possibilities of plane-to-plane contact stabilized between blocks with respect to the smooth surfaces of the prior art.
  • the protuberances and / or grooves being molded in the mass, the mechanical strength of the block is preserved, and the resulting asperities have a shear resistance much higher than asperities coming in added surface layer.
  • the invention relates to a shell block of one-piece molded concrete having protuberances and / or grooves, originating from molding, placed in a place having a given geomorphism.
  • the protuberances and / or grooves, originating from molding have a general geomorphism substantially equivalent to the geomorphism of the asperities of the place considered.
  • the block having this characteristic has the advantage of replacing the natural riprap without deteriorating the site, and by limiting the constraints linked to the supply and the routing of the natural riprap to the site. .
  • the concrete constituting the block can be colored in the tones of the geological environment of the place considered.
  • the invention also relates to a mold for producing a block according to the invention.
  • FIGS. 1A to 1C are schematic views of a block according to the invention.
  • FIGS. 2A to 2D are schematic views of an exemplary embodiment of a block according to the invention with granite geomorphism.
  • FIGS. 3A to 3D are schematic views of an exemplary embodiment of a block according to the invention with basalt geomorphism.
  • the blocks proposed as an example are blocks having as smooth polyhedron the shape of the blocks of US-A-4347017 however these examples intended for illustration and description are in no way limitative of the basic type of the blocks according to the invention.
  • the invention relates to a shell block 1 in one-piece molded concrete for the protection structure of maritime and river works.
  • This block 1 consists of legs 2 arranged together at given angles and inter-leg distances.
  • This block 1 has an exterior surface 6 of general profile defining a smooth polyhedron 3.
  • Smooth polyhedron 3 is the smoothed surface of the exterior profile of the block. In the prior art, this smooth polyhedron corresponds to the gross external formwork surface of the block.
  • At least part of the outer surface 6 has, with respect to the smooth polyhedron 3, protrusions 4 and / or grooves 5 originating from molding.
  • the smooth polyhedron 3 of block 1 is an imaginary polyhedron corresponding to the exterior surface of an equivalent block which would have been cast in a smooth mold.
  • the protrusions 4 and / or the grooves 5 are due to grooves and / or protrusions voluntarily produced in the mold (not shown) of the block 1.
  • the mold (not shown) can be the smooth mold of the equivalent smooth-skin block in which protuberant elements have been added comprising or generating grooves between them, so that when the concrete is poured into the mold, this results , in positive, grooves 5 and protrusions 4 on block 1.
  • protrusions 4 and / or grooves 5 have constitutive faces in planes secant to the local plane of the smooth polyhedron and together form an irregular uneven relief. As a result, this considerably increases the number of planes in which the nested blocks 1 are likely to find themselves in stabilized support. The resulting overlap presents larger inter-block vacuum spaces than with smooth-skinned blocks while preserving the group effect of the shell.
  • FIGS. 2A-2D and 3A-3D represent two examples of blocks according to the invention on which the protuberances 4 and / or the grooves 5 have a similar geomorphism with a granite site and a basalt site respectively.
  • the blocks according to the invention integrate into their deposition site without denaturing it.
  • the geomorphic block can advantageously be dyed in the mass in a tone similar to the geological colors of the site in which it is deposited.
  • the mold according to the present invention can be a rehabilitated smooth mold.
  • the production of such a rehabilitated mold can comprise the following stages:
  • a homothetic smooth block with a volume less than the volume of the smooth mold to be rehabilitated is produced, so that there is a vacuum thickness between the mold to rehabilitate the block.
  • the protuberances and the grooves are sculpted directly on the block; then the sculpted block is kept centered in the mold and a moldable material is poured between the sculpted block and the smooth wall of the mold. A reproducible block molding is thus obtained, and perfectly integrated into smooth molds to be rehabilitated.
  • the smooth block is coated with a thickness of easily shaped material in which the protuberances and the grooves are shaped; then the block with shaped outer layer is kept centered in the mold and a moldable material is poured between the block with shaped outer layer and the smooth wall of the mold. A reproducible block molding is thus obtained, and perfectly integrated into smooth molds to be rehabilitated.
  • the invention is not limited to the embodiments described and shown, but it is susceptible of numerous variants accessible to a person skilled in the art without departing from the invention.
  • the smooth base block can be replaced by any other known block.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Revetment (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Road Paving Structures (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Retaining Walls (AREA)
EP97400883A 1996-04-25 1997-04-21 In einem Stück gegossener Betonschutzblock, Giessform zur Herstellung desselben Expired - Lifetime EP0803612B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9605236 1996-04-25
FR9605236A FR2748044B1 (fr) 1996-04-25 1996-04-25 Bloc de carapace en beton moule monobloc, moule pour la realisation d'un tel bloc

Publications (2)

Publication Number Publication Date
EP0803612A1 true EP0803612A1 (de) 1997-10-29
EP0803612B1 EP0803612B1 (de) 2002-03-20

Family

ID=9491586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400883A Expired - Lifetime EP0803612B1 (de) 1996-04-25 1997-04-21 In einem Stück gegossener Betonschutzblock, Giessform zur Herstellung desselben

Country Status (20)

Country Link
EP (1) EP0803612B1 (de)
JP (1) JP3903396B2 (de)
KR (1) KR100516862B1 (de)
CN (1) CN1078919C (de)
AR (1) AR006677A1 (de)
AU (1) AU722756B2 (de)
BR (1) BR9701937A (de)
CA (1) CA2203685A1 (de)
DE (1) DE69711109T2 (de)
ES (1) ES2174197T3 (de)
FR (1) FR2748044B1 (de)
ID (1) ID16665A (de)
MA (1) MA24148A1 (de)
MY (1) MY116884A (de)
NO (1) NO322965B1 (de)
PT (1) PT803612E (de)
TN (1) TNSN97069A1 (de)
TR (1) TR199700317A2 (de)
TW (1) TW344774B (de)
ZA (1) ZA973560B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2315193B2 (es) * 2007-09-07 2009-12-04 Sociedad Anonina Trabajos Y Obras Molde para fabricacion de cubipodos de hormigon.
ES2356964B1 (es) * 2008-02-11 2011-11-29 Pedro González Requejo Balasto artificial para infraestructuras ferroviarias.
FR3118973B1 (fr) 2021-01-20 2025-02-28 Soletanche Freyssinet Méthode de suivi du déplacement de blocs préfabriqués d’une carapace d’une digue
CN115233709B (zh) * 2022-05-17 2024-06-21 中国水利水电第九工程局有限公司 一种河床围堰龙口截流装置及截流方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8903138A (nl) * 1989-12-21 1991-07-16 Hollandsche Betongroep Nv Golfremmende constructie.
US5395577A (en) * 1991-09-19 1995-03-07 Gorski; Dennis Process for forming artificial rocks
JPH083963A (ja) * 1994-06-15 1996-01-09 Masashi Yukimoto かみあわせを有した近自然石ブロックによる多自然型法面工法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043826A (en) * 1974-11-22 1977-08-23 Hum Bing W Process for making artificial rocks
FR2449164A1 (fr) * 1979-02-14 1980-09-12 Sogreah Bloc artificiel pour structures maritimes et fluviales
US4385088A (en) * 1981-05-22 1983-05-24 David Baskin Decorative artificial rock-like article
DE3740682A1 (de) * 1987-12-01 1989-06-15 Gabriele Donath Verfahren und vorrichtung zum herstellen eines naturgetreu nachgebildeten steines, vorzugsweise eines pflastersteines
JP2514887B2 (ja) * 1992-10-05 1996-07-10 昌司 行本 近自然石ブロックの製造方法
JP2588832B2 (ja) * 1993-06-01 1997-03-12 株式会社テトラ コンクリート製擬石の製造方法
US5441362A (en) * 1993-09-30 1995-08-15 The United States Of America As Represented By The Secretary Of The Army Concrete armor unit for protecting coastal and hydraulic structures and shorelines
JPH07331636A (ja) * 1994-06-13 1995-12-19 Masashi Yukimoto 自然石ブロック工法
US8903138B1 (en) * 2011-09-06 2014-12-02 Google Inc. Face recognition using pre-templates

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8903138A (nl) * 1989-12-21 1991-07-16 Hollandsche Betongroep Nv Golfremmende constructie.
US5395577A (en) * 1991-09-19 1995-03-07 Gorski; Dennis Process for forming artificial rocks
JPH083963A (ja) * 1994-06-15 1996-01-09 Masashi Yukimoto かみあわせを有した近自然石ブロックによる多自然型法面工法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; AN 96-094836, XP002020989 *

Also Published As

Publication number Publication date
NO971871D0 (no) 1997-04-23
MY116884A (en) 2004-04-30
FR2748044B1 (fr) 1998-07-10
ZA973560B (en) 1997-11-19
TNSN97069A1 (fr) 1999-12-31
AU1901797A (en) 1997-10-30
PT803612E (pt) 2002-07-31
DE69711109D1 (de) 2002-04-25
CN1168436A (zh) 1997-12-24
ES2174197T3 (es) 2002-11-01
TR199700317A2 (xx) 1997-11-21
TW344774B (en) 1998-11-11
MA24148A1 (fr) 1997-12-31
MX9703058A (es) 1998-06-30
AU722756B2 (en) 2000-08-10
FR2748044A1 (fr) 1997-10-31
KR100516862B1 (ko) 2005-11-21
BR9701937A (pt) 1998-09-15
CN1078919C (zh) 2002-02-06
EP0803612B1 (de) 2002-03-20
JP3903396B2 (ja) 2007-04-11
NO971871L (no) 1997-10-27
CA2203685A1 (fr) 1997-10-25
NO322965B1 (no) 2006-12-18
DE69711109T2 (de) 2002-09-05
JPH1096222A (ja) 1998-04-14
AR006677A1 (es) 1999-09-08
ID16665A (id) 1997-10-30

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