EP2912230A1 - Geotextile structure - Google Patents

Geotextile structure

Info

Publication number
EP2912230A1
EP2912230A1 EP13785559.9A EP13785559A EP2912230A1 EP 2912230 A1 EP2912230 A1 EP 2912230A1 EP 13785559 A EP13785559 A EP 13785559A EP 2912230 A1 EP2912230 A1 EP 2912230A1
Authority
EP
European Patent Office
Prior art keywords
geotextile
structure according
tubular
geotextile structure
anchoring
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
EP13785559.9A
Other languages
German (de)
French (fr)
Other versions
EP2912230B1 (en
Inventor
Philippe Delmas
Jean-Paul Ducol
Marie Tankere
Joanna GORNIAK
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.)
MDB Texinov SA
Deltaval SARL
Original Assignee
MDB Texinov SA
Deltaval SARL
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 MDB Texinov SA, Deltaval SARL filed Critical MDB Texinov SA
Priority to PL13785559T priority Critical patent/PL2912230T3/en
Publication of EP2912230A1 publication Critical patent/EP2912230A1/en
Application granted granted Critical
Publication of EP2912230B1 publication Critical patent/EP2912230B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/18—Making embankments, e.g. dikes, dams
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
    • D04B21/16—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E02D29/0258—Retaining or protecting walls characterised by constructional features
    • E02D29/0291—Retaining or protecting walls characterised by constructional features made up of filled, bag-like elements
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/023—Fabric with at least two, predominantly unlinked, knitted or woven plies interlaced with each other at spaced locations or linked to a common internal co-extensive yarn system
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/20—Industrial for civil engineering, e.g. geotextiles
    • D10B2505/204—Geotextiles

Definitions

  • the present invention relates to the field of geotextile structures, and more particularly to that of the field of recess and / or stabilization of soils and embankments, in the context of civil engineering operations. It aims at such a geotextile structure combining both simplicity of implementation and durability over time.
  • geosynthetics are traditionally in the form of sheets or layers, anchored in the soil to be stabilized, and placed before the positioning of a facing that will form the front of the embankment, such a facing may for example be made of stones, in molded concrete blocks, or others.
  • a facing may for example be made of stones, in molded concrete blocks, or others.
  • the confinement of the soil by such geosynthetics in the vicinity of the facing requires the use of suitable formwork, implementation often long, expensive and tedious. Indeed, it is appropriate to bring to the site all the technical means, facing materials and formwork means, thus requiring as many handling operations and implementation.
  • the objective of the present invention resides first and foremost in the simplification of the realization of the stabilization of floors, especially furniture, on the one hand, and the realization of embankments on the other hand, particularly in areas with difficulty accessible and therefore in which the contribution of conventional materials is difficult or impossible.
  • the invention relates to a geotextile structure comprising a tubular portion, capable of being filled with a granular material, associated with an anchoring ply of the assembly constituting the structure in the soil to be stabilized, or in the backfill. strengthen.
  • the invention consists in producing a tubular structure in which are injected aggregates, advantageously of reduced density, capable of absorbing and damping the compressive forces, resulting on the one hand from the embankment that the structure is intended to stabilize as well as operating overloads applied thereto, and secondly, the possible stacking of the geotextile structures of the invention on one another, particularly in the case of slopes, this tubular structure being inked in the ground by means of the sheet with which it is associated.
  • the tubular portion and the anchor layer consist of a unitary knitted structure, made by the so-called "knit stitch" technology, and generally free of any seams.
  • the structure is particularly feasible on knitting loom type Rachel Rachel double needle.
  • it can be envisaged the implementation of seams, in particular for the definition of the tubular part.
  • This structure is typically made of high tenacity synthetic fibers, especially polyester, polyethylene, polyamide, polypropylene, PVA (polyvinyl acetate), or even aramid, when it is intended to be subjected to very high stresses. It may also consist of a mixture of these fibers.
  • this structure in particular in its tubular part, has a permeability to air to allow the pressure filling of the aggregates, and to obtain a confinement conferring the desired cohesion of the material thus injected.
  • this air permeability measured according to standard NF EN ISO 9237, is between 1000 and 10000 L / m 2 .s under a pressure of 1300 Pa, and advantageously between 3000 and 6000 L / m 2 .s, for an opening rate between 10 and 20%.
  • the injection of aggregates can be made difficult or impossible because of discharge phenomena related to the pressure of the air inside the tube, for example. In addition, it can no longer be confined or compact said aggregates within the tubular zone, thereby affecting the desired technical effect, especially in terms of strength, rigidity and stability.
  • the permeability of the textile will also be adapted to the type of granular material chosen or available on the site, and to the process of injecting the material into the tubes.
  • the textile structure has a high tensile modulus to allow adequate pressure on the material filling the tubular portion, and thus ensure the desired confinement effect, without causing significant deformation of the envelope defined by the tubular part, and further, to meet the requirements of very small deformation in the long term, under the effect of the constraints of the civil engineering works for which it is intended.
  • the structure can be obtained on Rachel double needle bedding with weft insertion, at least on one of the two textile plies, in order to obtain a different modulus of deformation at the level of the ply. intended for anchoring.
  • the yarn inserted in weft may have different strength and elongation depending on whether it is intended to ensure the holding of the tubular zone or that of the anchoring portion.
  • the geotextile structure may have two or more tubular parts.
  • the diameter of the two extreme tubular portions thus defined may be identical or different.
  • Figure la is a schematic representation in cross section of a first embodiment of the geotextile structure of the invention, prior to its filling.
  • Figure lb is a view similar to Figure la, but in which the geotextile structure is filled with filling material.
  • Figure 2 is a schematic representation in section of the implementation of the geotextile structure of Figures la and lb, in a civil engineering embankment type.
  • FIGS 3 and 4 schematically illustrate the mode of confinement within the tabular portion of the geotextile structure of the invention, and the geometric behavior of said tabular portion when it is put under load in the final work.
  • Figures 5a, 5b and 5c are schematic cross-sectional views of variants of the geotextile structure of the invention.
  • Figure 6 is a schematic representation illustrating the implementation of one of these variants within a backfill.
  • Figure 7 is a graph tending to illustrate the tensile curve of the tabular zone of the geosynthetic structure of the invention.
  • FIGS. 8a to 8f represent the various steps of the implementation of the structure of the invention for producing, for example, a monolithic cladding.
  • Figures 9a, 9b and 9c illustrate the implementation of the structure of the invention for the realization of foundations on soft ground.
  • FIGS. 1 and 2 show the geotextile structure according to the invention in cross-section.
  • This structure is composed of a unitary knit, obtained, as already indicated by the implementation of the jetty mesh technology, on a loom George double needle, allowing, at the output of the machine, to define the two characteristic zones of the invention, respectively a tabular portion (102) and a flat portion (103), the latter being defined hereinafter by the expression "anchor web”.
  • This type of technology makes it possible to produce double-faced textiles, that is to say having two textile surfaces in parallel planes, which may be identical or of different geometries due to the nature and the binding of the threads used. artwork. These two surfaces are simultaneously connected by orthogonal wires substantially perpendicular to said surfaces in order either to connect them completely or not to connect them in specific zones.
  • the tubular zone there is no connection between the two textiles: there is only connection on each side to close the tube.
  • the two faces are integrally connected by modifying the bindings for this purpose.
  • This structure is made based on son or fibers having characteristics, including mechanical strength on the one hand, and physico-chemical on the other hand, compatible with the application envisaged in terms of civil engineering.
  • polypropylene polypropylene
  • polyvinyl acetate or even aramid
  • Other suitable fibers may be used, such as, for example, polyester, polyamide, polyethylene, depending on the chemical environment of the materials.
  • tubular portion (102) has a permeability adapted to allow its filling in good compacting conditions with a granular material, as described below.
  • FIG. 1b shows the tubular zone (102) filled with a granular material.
  • this granular material is advantageously made of low density clay balls.
  • this density is of the order of 300 kg / m 3 , compared with a density of 5 to 6 times greater for a standard soil.
  • these expanded clay granules have:
  • ⁇ 3 to 5 kN / m 3 .
  • clay balls marketed under the trademark "LECA” with a particle size of between 10 and 20 millimeters in diameter.
  • FIG. 7 shows the tensile curve of the geosynthetic structure of the invention. There are two distinct zones, characterizing the expansion capacity and the final power-up.
  • the zone (701) is established at 10 - 15% maximum of deformation, this zone corresponding to the tensioning of the tube during the injection of the granulate inside.
  • the zone (702) determines the operating resistance of the geosynthetic from which the service resistance calculated according to the state of the art is determined according to the constraints in the structure.
  • the breaking strength is between 40 and 80 kN.
  • FIGS. 3 and 4 also show, on the one hand, the effective confinement of the granular material at the level of the tabular part and, on the other hand, its geometric behavior under load and under confinement.
  • FIG. 2 illustrates the stacking of the geotextile structures of the invention during their implementation for the realization of a civil engineering work of embankment or slope type, said tabular zones being positioned in front of the structure, in order to constitute the front of the embankment or slope.
  • the anchoring plies are each covered with a layer of soil or embankment, which, because of the weight they exert, stiffen the structure and optimize the stability of the front formed by the tabular zones filled with aggregates. or granular material.
  • FIGS. 5a, 5b and 5c show variant embodiments of the invention.
  • a geotextile structure comprising several tabular areas, in this case of different diameter.
  • This variant makes it possible to provide practical and effective solutions to face fixing problems, or to make junctions with other elements. It is then possible to insert tubes, rods or metal bars for example, in these tubular zones so as to allow connections between the layers, in the longitudinal, transverse and vertical directions. Said connections are then able to transmit the desired functional forces.
  • the diameter of the tubular zones may vary from a few centimeters, for example from 2 to 10 centimeters, up to 50 or even 100 centimeters, depending on the thicknesses of layers calculated, and depending on the nature of the structure to be reinforced.
  • tubular zones of large diameters are intended to constitute the front of the embankment mass to be reinforced, and the tubular zones of small diameters are intended for the passage of rods or metal tubes, for example in order to make skirting cladding, and such as shown in Figure 5c.
  • the tubular zones intended to receive such elements are not filled by the aggregates.
  • additional tubular zones may also allow the realization of a complementary anchorage in the form of a geosynthetic web bonded by these means to the anchoring ply of the structure.
  • Different junction means may be implemented, such as staple or hook systems, as shown in broken lines in Figure 5c.
  • FIG. 6 shows the implementation of such a geosynthetic structure.
  • This embodiment can also be implemented for the realization of foundation on soft or poor ground, as well as for the realization of railroad track without ballast, as for example illustrated in Figures 9a, 9b and 9c.
  • FIGS. 8a-8f show the various steps of producing a monolithic embankment facing, implementing the geosynthetic structure of the present invention.
  • FIGS. 8a-8f show the various steps of producing a monolithic embankment facing, implementing the geosynthetic structure of the present invention.
  • Said structure prior to filling the tubular zone, is easily transportable on site: it can be in particular roll, and therefore a small footprint.
  • the structure of the invention gives the structure to achieve a very high stability, both in terms of mechanical strength than in time.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Textile Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Abstract

The invention relates to a geotextile structure, in particular for reinforcing and/or stabilising soil and embankments, comprising at least one tubular part (102) that can be filled with a granular material that is confined therein, said tubular part being associated with a mat (103) for anchoring the structure-forming assembly in the soil to be stabilised or in the embankment to be reinforced.

Description

STRUCTURE GEOTEXTILE  GEOTEXTILE STRUCTURE
DOMAINE DE L'INVENTION FIELD OF THE INVENTION
La présente invention se rapporte au domaine des structures géotextiles, et plus particulièrement à celui du domaine du renfoncement et/ou de la stabilisation des sols et des remblais, dans le cadre d'opérations de génie civil. Elle vise une telle structure géotextile alliant tout à la fois la simplicité de mise en œuvre et la pérennité dans le temps. The present invention relates to the field of geotextile structures, and more particularly to that of the field of recess and / or stabilization of soils and embankments, in the context of civil engineering operations. It aims at such a geotextile structure combining both simplicity of implementation and durability over time.
ETAT ANTÉRIEUR DE LA TECHNIQUE La réalisation d'infrastructures de génie civil en zones critiques, telles que par exemple, des remblais, des pentes, des sols meubles, ou encore la réalisation de digues, posent un certain nombre de difficultés, notamment en relation avec la stabilité des ouvrages ainsi réalisés. En effet, de tels ouvrages sont soumis à des sollicitations importantes, continues ou répétées, nécessitant d'être localement renforcés. PRIOR STATE OF THE ART The construction of civil engineering infrastructures in critical areas, such as, for example, embankments, slopes, loose soil, or the construction of dikes, poses a certain number of difficulties, particularly in relation to the stability of the structures thus produced. Indeed, such structures are subject to significant solicitations, continuous or repeated, requiring to be locally reinforced.
La mise en œuvre des géosynthétiques depuis de nombreuses années, notamment au niveau des remblais et des murs de soutènement, a permis d'améliorer signifïcativement la réalisation de tels ouvrages. The implementation of geosynthetics for many years, particularly at embankments and retaining walls, has significantly improved the realization of such structures.
Ces géosynthétiques se présentent traditionnellement sous la forme de nappes ou couches, ancrées dans le sol à stabiliser, et mises en place avant le positionnement d'un parement qui va constituer le front du remblai, un tel parement pouvant par exemple être réalisé en pierres, en blocs de béton moulé, ou autres. Le confinement du sol par de tels géosynthétiques à proximité du parement nécessite l'utilisation de coffrages adaptés, de mise en œuvre souvent longue, coûteuse et fastidieuse. En effet, il convient d'apporter sur le site l'ensemble des moyens techniques, les matériaux de parement et les moyens de coffrage, nécessitant ainsi autant d'opérations de manutention et de mise en place. These geosynthetics are traditionally in the form of sheets or layers, anchored in the soil to be stabilized, and placed before the positioning of a facing that will form the front of the embankment, such a facing may for example be made of stones, in molded concrete blocks, or others. The confinement of the soil by such geosynthetics in the vicinity of the facing requires the use of suitable formwork, implementation often long, expensive and tedious. Indeed, it is appropriate to bring to the site all the technical means, facing materials and formwork means, thus requiring as many handling operations and implementation.
L'objectif visé par la présente invention réside tout d'abord dans la simplification de la réalisation de la stabilisation de sols, meubles notamment, d'une part, et de la réalisation de remblais d'autre part, en particulier dans des zones difficilement accessibles et donc dans lesquelles l'apport de matériaux classiques est difficile, voire impossible. The objective of the present invention resides first and foremost in the simplification of the realization of the stabilization of floors, especially furniture, on the one hand, and the realization of embankments on the other hand, particularly in areas with difficulty accessible and therefore in which the contribution of conventional materials is difficult or impossible.
EXPOSE DE L'INVENTION SUMMARY OF THE INVENTION
A cet effet, l'invention concerne une structure géotextile comprenant une partie tubulaire, apte à être remplie par un matériau granulaire, associée à une nappe d'ancrage de l'ensemble constitutif de la structure dans le sol à stabiliser, ou dans le remblai à renforcer. To this end, the invention relates to a geotextile structure comprising a tubular portion, capable of being filled with a granular material, associated with an anchoring ply of the assembly constituting the structure in the soil to be stabilized, or in the backfill. strengthen.
En d'autres termes, l'invention consiste à réaliser une structure tubulaire dans laquelle sont injectés des granulats, avantageusement de densité réduite, susceptible d'encaisser et d'amortir les efforts de compression, résultant d'une part du remblai que la structure est destinée à stabiliser ainsi que des surcharges d'exploitation appliquées à celui-ci, et d'autre part, de l'éventuel empilement des structures géotextiles de l'invention l'une sur l'autre, notamment en cas de pentes, cette structure tubulaire étant encrée dans le sol au moyen de la nappe à laquelle elle est associée. In other words, the invention consists in producing a tubular structure in which are injected aggregates, advantageously of reduced density, capable of absorbing and damping the compressive forces, resulting on the one hand from the embankment that the structure is intended to stabilize as well as operating overloads applied thereto, and secondly, the possible stacking of the geotextile structures of the invention on one another, particularly in the case of slopes, this tubular structure being inked in the ground by means of the sheet with which it is associated.
On dispose ainsi d'une structure susceptible d'être très facilement mise en œuvre, et en outre, permettant d'assurer le confinement d'un matériau de remplissage se présentant sous la forme d'agrégats, ce qui confère à l'ensemble une haute résistance pour le renfort de structure de sol, notamment mais pas limitativement, et également pour les applications pour lesquelles les solutions conventionnelles sont difficiles, voire impossibles à mettre en œuvre (accessibilité de l'ouvrage, charges limitées, zone dangereuse...) Selon l'invention, la partie tubulaire et la nappe d'ancrage sont constituées d'une structure unitaire tricotée, réalisée par la technologie dite « à maille jetée », et généralement exempte de toutes coutures. Dans ce cas, la structure est notamment réalisable sur des métiers maille jetée de type Rachel double fonture. Alternativement, il peut être envisagé la mise en œuvre de coutures, notamment pour la définition de la partie tubulaire. There is thus a structure that can be very easily implemented, and in addition, to ensure the containment of a filling material in the form of aggregates, which gives the whole a high strength for the reinforcement of soil structure, including but not limited to, and also for applications for which conventional solutions are difficult or impossible to implement (accessibility of the structure, limited loads, danger zone, etc.). According to the invention, the tubular portion and the anchor layer consist of a unitary knitted structure, made by the so-called "knit stitch" technology, and generally free of any seams. In this case, the structure is particularly feasible on knitting loom type Rachel Rachel double needle. Alternatively, it can be envisaged the implementation of seams, in particular for the definition of the tubular part.
Cette structure est typiquement réalisée en fibres synthétiques haute ténacité , notamment en polyester, polyéthylène, polyamide, polypropylène, en PVA (polyvinyle acétate), voire en aramide, lorsqu'elle est destinée à être soumise à de très fortes contraintes. Elle peut également être constituée d'un mélange de ces fibres. This structure is typically made of high tenacity synthetic fibers, especially polyester, polyethylene, polyamide, polypropylene, PVA (polyvinyl acetate), or even aramid, when it is intended to be subjected to very high stresses. It may also consist of a mixture of these fibers.
En fonction des caractéristiques physico-chimiques du matériau, en particulier de son pH, injecté dans le géotextile en question, on choisit les fibres les mieux appropriées. Au surplus, cette structure, notamment dans sa partie tubulaire, présente une perméabilité à l'air pour permettre le remplissage sous pression des granulats, et pour obtenir un confinement conférant la cohésion recherchée du matériau ainsi injecté. Depending on the physicochemical characteristics of the material, in particular its pH, injected into the geotextile in question, the most appropriate fibers are chosen. Moreover, this structure, in particular in its tubular part, has a permeability to air to allow the pressure filling of the aggregates, and to obtain a confinement conferring the desired cohesion of the material thus injected.
Typiquement, cette perméabilité à l'air, mesurée selon la norme NF EN ISO 9237, se situe entre 1000 et 10000 L/m2.s sous une pression de 1300 Pa, et avantageusement entre 3000 et 6000 L/m2.s, pour un taux d'ouverture compris entre 10 et 20 %. Typically, this air permeability, measured according to standard NF EN ISO 9237, is between 1000 and 10000 L / m 2 .s under a pressure of 1300 Pa, and advantageously between 3000 and 6000 L / m 2 .s, for an opening rate between 10 and 20%.
Si cette perméabilité n'est pas dans cette plage idéale, l'injection des granulats peut être rendue difficile, voire impossible, en raison de phénomènes de refoulement liés à la pression de l'air à l'intérieur du tube par exemple. En outre, on ne peut plus alors confiner ou compacter lesdits granulats au sein de la zone tubulaire, affectant dès lors l'effet technique recherché, notamment en termes de tenue, de rigidité et de stabilité. La perméabilité du textile sera également adaptée au type de matériau granulaire choisi ou disponible sur le chantier, et au procédé d'injection du matériau dans les tubes. If this permeability is not in this ideal range, the injection of aggregates can be made difficult or impossible because of discharge phenomena related to the pressure of the air inside the tube, for example. In addition, it can no longer be confined or compact said aggregates within the tubular zone, thereby affecting the desired technical effect, especially in terms of strength, rigidity and stability. The permeability of the textile will also be adapted to the type of granular material chosen or available on the site, and to the process of injecting the material into the tubes.
Le choix du matériau constitutif de cette structure répond également à une exigence de comportement et de résistance mécanique, notamment la résistance à l'abrasion lors du remplissage et dans le temps, en termes de durabilité chimique et de fluage. Elle doit également tenir compte des conditions physiques ou chimiques liées à la nature du matériau de remplissage d'une part, et de celle du sol dans lequel elle est destinée à venir s'ancrer d'autre part. The choice of the material constituting this structure also meets a requirement of behavior and mechanical strength, including resistance to abrasion during filling and over time, in terms of chemical durability and creep. It must also take into account the physical or chemical conditions related to the nature of the filling material on the one hand, and that of the soil in which it is intended to become anchored on the other hand.
Au demeurant, la structure textile présente un module de traction élevé afin de permettre une pression adéquate sur le matériau remplissant la partie tubulaire, et assurer ainsi l'effet de confinement recherché, sans pour autant engendrer de déformations importantes de l'enveloppe définie par la partie tubulaire, et en outre, permettant de répondre aux exigences de très faibles déformations à long terme, sous l'effet des contraintes de l'ouvrage de génie civil pour lequel elle est destinée. Moreover, the textile structure has a high tensile modulus to allow adequate pressure on the material filling the tubular portion, and thus ensure the desired confinement effect, without causing significant deformation of the envelope defined by the tubular part, and further, to meet the requirements of very small deformation in the long term, under the effect of the constraints of the civil engineering works for which it is intended.
En outre, la mise en œuvre de la technologie « maille jetée » sur métier Rachel double fonture permet de réaliser en une seule opération ladite structure, c'est-à-dire définissant en sortie de machine la partie tubulaire et la nappe d'ancrage. In addition, the implementation of the technology "jetty disc" Rachel loom on double bed allows to achieve in a single operation said structure, that is to say defining at the machine outlet the tubular portion and the anchor web .
Selon un mode particulier de la présente invention, la structure peut être obtenue sur des métiers Rachel double fonture avec insertion de trame, au moins sur l'une des deux nappes textiles, afin d'obtenir un module de déformation différent au niveau de la nappe destinée à l'ancrage. Typiquement, le fil inséré en trame peut présenter une résistance et un allongement différents selon qu'il est destiné à assurer la tenue de la zone tubulaire ou celle de la partie ancrage. According to one particular embodiment of the present invention, the structure can be obtained on Rachel double needle bedding with weft insertion, at least on one of the two textile plies, in order to obtain a different modulus of deformation at the level of the ply. intended for anchoring. Typically, the yarn inserted in weft may have different strength and elongation depending on whether it is intended to ensure the holding of the tubular zone or that of the anchoring portion.
Le fait de rajouter une trame dans ce sens limite l'extensibilité du géotextile à celle des fils utilisés en trame sans interaction du liage proprement dit. Dans ce cas, en choisissant des fibres de raideur ou ténacité contrôlées, on transmet leur comportement directement au géotextile avec incidence sur le comportement de l'ouvrage. Selon l'invention, il peut être prévu des moyens de liaison entre les parties tubulaires, tant horizontalement, notamment pour réaliser des ouvrages de grandes longueurs, que verticalement, afin d'atteindre la hauteur désirée dans de bonnes conditions de stabilité. Ces moyens de liaison font partie intégrante de la structure géotextile, et peuvent le cas échéant être prévus dans l'armure textile. Ainsi, selon un mode de réalisation de l'invention, la structure géotextile peut présenter deux voire plusieurs parties tubulaires. Notamment, il peut être envisagé de prévoir deux parties tubulaires extrêmes, séparées l'une de l'autre par la nappe d'ancrage. Il est alors possible d'insérer, par exemple, des tubes, des joncs, des câbles ou des barres métalliques, voire des sangles dans certaines de ces zones tubulaires additionnelles, et de manière générale tout moyen équivalent, et de facilement les relier par tous moyens mécaniques ou brides de liaison... Adding a frame in this direction limits the extensibility of the geotextile to that of the threads used in the weft without interaction of the binding itself. In this case, by choosing controlled stiffness or toughness fibers, their behavior is transmitted directly to the geotextile, with an impact on the behavior of the structure. According to the invention, there can be provided connecting means between the tubular parts, both horizontally, especially for making long length structures, and vertically, in order to achieve the desired height in good conditions of stability. These connecting means are an integral part of the geotextile structure, and may optionally be provided in the textile armor. Thus, according to one embodiment of the invention, the geotextile structure may have two or more tubular parts. In particular, it can be envisaged to provide two extreme tubular parts, separated from each other by the anchoring ply. It is then possible to insert, for example, tubes, rods, cables or metal bars, or even straps in some of these additional tubular zones, and generally any equivalent means, and easily connect them by all mechanical means or connecting flanges ...
Là encore, quel que soit le nombre de parties tubulaires, la structure est susceptible d'être obtenue en une seule opération sur un métier Rachel double fonture Again, regardless of the number of tubular parts, the structure is likely to be obtained in a single operation on a loom Rachel double needle
Le diamètre des deux parties tubulaires extrêmes ainsi définies peut être identique ou différent. EXPOSE DES FIGURES The diameter of the two extreme tubular portions thus defined may be identical or different. EXPOSE OF FIGURES
La manière dont l'invention peut être réalisée et les avantages qui en découlent, ressortiront mieux des exemples de réalisation qui suivent, donnés à titre indicatif et non limitatif à l'appui des figures annexées. The manner in which the invention can be realized and the advantages which result therefrom will emerge more clearly from the following exemplary embodiments, given as an indication and not a limitation to the accompanying figures.
La figure la est une représentation schématique en section transversale d'une première forme de réalisation de la structure géotextile de l'invention, préalablement à son remplissage. Figure la is a schematic representation in cross section of a first embodiment of the geotextile structure of the invention, prior to its filling.
La figure lb est une vue analogue à la figure la, mais dans laquelle la structure géotextile est remplie en matériau de remplissage. La figure 2 est une représentation schématique en section de la mise en œuvre de la structure géotextile des figures la et lb, au sein d'un ouvrage de génie civil de type remblai. Figure lb is a view similar to Figure la, but in which the geotextile structure is filled with filling material. Figure 2 is a schematic representation in section of the implementation of the geotextile structure of Figures la and lb, in a civil engineering embankment type.
Les figures 3 et 4 illustrent schématiquement le mode de confinement à l'intérieur de la partie tabulaire de la structure géotextile de l'invention, ainsi que le comportement géométrique de ladite partie tabulaire lorsqu'elle est mise sous charge dans l'ouvrage final.  Figures 3 and 4 schematically illustrate the mode of confinement within the tabular portion of the geotextile structure of the invention, and the geometric behavior of said tabular portion when it is put under load in the final work.
Les figures 5 a, 5b et 5 c représentent des vues schématiques en section transversale de variantes de la structure géotextile de l'invention.  Figures 5a, 5b and 5c are schematic cross-sectional views of variants of the geotextile structure of the invention.
La figure 6 est une représentation schématique illustrant la mise en œuvre de l'une de ces variantes au sein d'un remblai. Figure 6 is a schematic representation illustrating the implementation of one of these variants within a backfill.
La figure 7 est un graphe tendant à illustrer la courbe de traction de la zone tabulaire de la structure géosynthétique de l'invention.  Figure 7 is a graph tending to illustrate the tensile curve of the tabular zone of the geosynthetic structure of the invention.
Les figures 8a à 8f représentent les différentes étapes de la mise en œuvre de la structure de l'invention pour la réalisation, par exemple, d'un parement monolithique.  FIGS. 8a to 8f represent the various steps of the implementation of the structure of the invention for producing, for example, a monolithic cladding.
Les figures 9a, 9b et 9c illustrent la mise en œuvre de la structure de l'invention pour la réalisation de fondations sur sols meubles.  Figures 9a, 9b and 9c illustrate the implementation of the structure of the invention for the realization of foundations on soft ground.
DESCRIPTION DÉTAILLÉE DE L'INVENTION DETAILED DESCRIPTION OF THE INVENTION
On a donc représenté sur les figures 1 et 2 la structure géotextile conforme à l'invention, en section transversale. FIGS. 1 and 2 show the geotextile structure according to the invention in cross-section.
Cette structure est composée d'un tricot unitaire, obtenu, comme déjà indiqué par la mise en œuvre de la technologie à maille jetée, sur un métier Rachel double fonture, permettant, en sortie de machine, de définir les deux zones caractéristiques de l'invention, respectivement une partie tabulaire (102) et une partie plane (103), cette dernière étant définie ci-après par l'expression « nappe d'ancrage ». Ce type de technologie permet de réaliser des textiles double face, c'est-à-dire présentant deux surfaces textiles dans des plans parallèles, lesquelles peuvent être identiques ou de géométries différentes de par la nature et les liages des fils mis en œuvre. Ces deux surfaces sont simultanément reliées par des fils orthogonaux sensiblement perpendiculaires aux dites surfaces afin, soit de les relier complètement, soit de ne pas les relier dans des zones déterminées. C'est ainsi que dans la zone tubulaire, on n'a pas de liaison entre les deux textiles : il n'y a de liaison que de de chaque côté pour fermer le tube. Ensuite dans la zone d'ancrage, on relie intégralement les deux faces en modifiant les liages à cet effet. This structure is composed of a unitary knit, obtained, as already indicated by the implementation of the jetty mesh technology, on a loom Rachel double needle, allowing, at the output of the machine, to define the two characteristic zones of the invention, respectively a tabular portion (102) and a flat portion (103), the latter being defined hereinafter by the expression "anchor web". This type of technology makes it possible to produce double-faced textiles, that is to say having two textile surfaces in parallel planes, which may be identical or of different geometries due to the nature and the binding of the threads used. artwork. These two surfaces are simultaneously connected by orthogonal wires substantially perpendicular to said surfaces in order either to connect them completely or not to connect them in specific zones. Thus in the tubular zone, there is no connection between the two textiles: there is only connection on each side to close the tube. Then in the anchoring zone, the two faces are integrally connected by modifying the bindings for this purpose.
Cette structure est réalisée à base de fils ou fibres présentant des caractéristiques, notamment de résistance mécanique d'une part, et physico-chimique d'autre part, compatibles avec l'application envisagée en termes de génie civil. This structure is made based on son or fibers having characteristics, including mechanical strength on the one hand, and physico-chemical on the other hand, compatible with the application envisaged in terms of civil engineering.
Typiquement, elle peut être réalisée en polypropylène, polyvinyl acétate, voire en aramide, ou encore en un mélange de ces fibres. D'autres fibres appropriées peuvent être mises en œuvre, telles que par exemple du polyester, du polyamide, du polyéthylène, suivant l'environnement chimique des matériaux. Typically, it may be made of polypropylene, polyvinyl acetate, or even aramid, or a mixture of these fibers. Other suitable fibers may be used, such as, for example, polyester, polyamide, polyethylene, depending on the chemical environment of the materials.
En outre, et notamment au niveau de la partie tubulaire (102), elle présente une perméabilité adaptée pour permettre son remplissage dans des bonnes conditions de compactage avec un matériau granulaire, ainsi que décrit ci-après. In addition, and especially at the tubular portion (102), it has a permeability adapted to allow its filling in good compacting conditions with a granular material, as described below.
A titre exemplatif, il est décrit ci-après, un mode de disposition des fils sur une jauge machine 6, 9 ou 12 (ces trois valeurs représentant le nombre d'aiguilles au pouce de 25,4 mm) et ce afin de répartir les parties tubulaires (102) et la nappe d'ancrage (103). By way of example, it is described below, a mode of arrangement of the son on a machine gauge 6, 9 or 12 (these three values representing the number of needles per inch of 25.4 mm) and in order to distribute the tubular portions (102) and the anchor web (103).
Barre I 88/00/00/88 Bar I 88/00/00/88
Barre II 22/20/00/02  Bar II 22/20/00/02
Barre III 11/10/00/01  Bar III 11/10/00/01
Barre IV 10/10/01/01  Bar IV 10/10/01/01
Barre V 10/00/01/11  Bar V 10/00/01/11
Barre VI 20/00/02/22  Bar VI 20/00/02/22
Barre VII 00/00/88/88 On peut observer sur la figure lb, la zone tabulaire (102) remplie d'un matériau granulaire. En l'espèce, ce matériau granulaire est avantageusement constitué de billes d'argile de faible densité. Typiquement, cette densité est de l'ordre de 300 kg/m3, à comparer avec une densité de 5 à 6 fois plus importante pour un sol standard. Bar VII 00/00/88/88 FIG. 1b shows the tubular zone (102) filled with a granular material. In this case, this granular material is advantageously made of low density clay balls. Typically, this density is of the order of 300 kg / m 3 , compared with a density of 5 to 6 times greater for a standard soil.
Typiquement, ces granulés en argile expansée présentent : Typically, these expanded clay granules have:
un angle de frottement φ' = 38° (il s'agit de l'angle du talus naturel) ;  a friction angle φ '= 38 ° (this is the angle of the natural slope);
un poids volumique γ = 3 à 5 kN/m3. A titre exemplatif, on peut utiliser des billes d'argile commercialisées sous la marque déposée « LECA », de granulométrie comprise entre 10 et 20 millimètres de diamètre. a density γ = 3 to 5 kN / m 3 . By way of example, it is possible to use clay balls marketed under the trademark "LECA", with a particle size of between 10 and 20 millimeters in diameter.
La mise en œuvre d'un tel granulat permet d'assurer une isolation thermique et phonique, et en outre une facilité de mise en œuvre, et notamment de remplissage de la partie tabulaire par soufflage, au moyen de machines soufflantes bien connues, munies d'un tube simplement introduit dans la partie tabulaire en vue de son remplissage, et corollairement du compactage desdits granulats au sein de ladite partie (102). The implementation of such a granulate provides thermal and sound insulation, and also ease of implementation, including filling the tabular part by blowing, by means of blowers well known, equipped with a tube simply introduced into the tabular portion for filling, and corollary compacting said aggregates within said portion (102).
On a représenté en relation avec la figure 7, la courbe de traction de la structure géosynthétique de l'invention. On peut observer deux zones distinctes, caractérisant la capacité d'extension et de la mise sous tension finale. FIG. 7 shows the tensile curve of the geosynthetic structure of the invention. There are two distinct zones, characterizing the expansion capacity and the final power-up.
Ainsi donc, la zone (701) s'établit à 10 - 15% maximum de déformation, cette zone correspondant à la mise sous tension du tube lors de l'injection du granulat à l'intérieur. Thus, the zone (701) is established at 10 - 15% maximum of deformation, this zone corresponding to the tensioning of the tube during the injection of the granulate inside.
La zone (702) détermine la résistance de fonctionnement du géosynthétique à partir de laquelle on détermine la résistance de service calculée suivant l'état de l'art en fonction des contraintes dans l'ouvrage. La résistance à la rupture s'établit entre 40 et 80 kN. On a également représenté en relation avec les figures 3 et 4, d'une part le confinement effectif du matériau granulaire au niveau de la partie tabulaire, et d'autre part, son comportement géométrique sous charge et sous confinement. Ainsi donc, on peut comprendre que l'injection des granulats au sein de la partie tabulaire induit l'extension de cette dernière radialement. En réaction, elle induit des forces de compaction, engendrant le confinement desdits granulats et corollairement de la cohésion à l'ensemble desdits granulats, et de la rigidité à l'ensemble de la structure. The zone (702) determines the operating resistance of the geosynthetic from which the service resistance calculated according to the state of the art is determined according to the constraints in the structure. The breaking strength is between 40 and 80 kN. FIGS. 3 and 4 also show, on the one hand, the effective confinement of the granular material at the level of the tabular part and, on the other hand, its geometric behavior under load and under confinement. Thus, it can be understood that the injection of aggregates within the tabular portion induces the extension of the latter radially. In response, it induces compaction forces, causing the confinement of said aggregates and corollary cohesion to all of said aggregates, and rigidity to the entire structure.
La déformation de la partie tabulaire apparaît bien en figure 4. Cette déformation est inhérente au compactage de la zone tabulaire, à la charge, du remblai ou du sol notamment, mais également, des éventuelles autres structures géosynthétiques de l'invention, susceptibles de venir s'empiler les unes sur les autres, jusqu'à atteindre la hauteur souhaitée. The deformation of the tabular part appears well in FIG. 4. This deformation is inherent to the compaction of the tabular zone, to the load, of the backfill or the soil in particular, but also, of the possible other geosynthetic structures of the invention, likely to come stack on top of each other until you reach the desired height.
On observe ainsi un relatif aplatissement de la zone tabulaire, toutefois limité, la flèche supérieure illustrant le poids principal de la charge inhérente au remblai, au sein duquel la structure géotextile de l'invention se met en place, outre des éventuelles structures géotextiles empilées au-dessus de celles-ci, et tel que par exemple illustré sur la figure 2. Cet aplatissement permet d'augmenter les surfaces de superposition, et corollairement optimise la stabilité de l'ensemble. There is thus a relative flattening of the tabular zone, however limited, the upper arrow illustrating the main weight of the load inherent in the backfill, in which the geotextile structure of the invention is put in place, in addition to possible geotextile structures stacked at above them, and such as for example shown in Figure 2. This flattening increases the superposition surfaces, and corollary optimizes the stability of the assembly.
La figure 2 illustre l'empilement des structures géotextiles de l'invention lors de leur mise en œuvre pour la réalisation d'un ouvrage de génie civil de type remblai ou pente, lesdites zones tabulaires étant positionnées en avant de l'ouvrage, afin de constituer le front du remblai ou de la pente. On peut observer que les nappes d'ancrage sont chacune recouvertes d'une couche de sol ou de remblai, qui en raison du poids qu'elles exercent, rigidifîent la structure et optimisent la stabilité du front constitué par les zones tabulaires remplies d'agrégats ou de matériau granulaire. FIG. 2 illustrates the stacking of the geotextile structures of the invention during their implementation for the realization of a civil engineering work of embankment or slope type, said tabular zones being positioned in front of the structure, in order to constitute the front of the embankment or slope. It can be observed that the anchoring plies are each covered with a layer of soil or embankment, which, because of the weight they exert, stiffen the structure and optimize the stability of the front formed by the tabular zones filled with aggregates. or granular material.
On a représenté en relation avec la figure 5a, 5b, 5c, des variantes de réalisation de l'invention. Ainsi donc, au sein de la figure 5 a, on a représenté une structure géotextile comprenant plusieurs zones tabulaires, en l'espèce de diamètre différent. Cette variante permet d'apporter des solutions pratiques et efficaces à des problèmes de fixation de parement, ou pour effectuer des jonctions avec d'autres éléments. Il est alors possible d'insérer des tubes, joncs ou barres métalliques par exemple, dans ces zones tubulaires de façon à permettre des connexions entre les nappes, selon les directions longitudinales, transversales et verticales. Lesdites connexions sont alors susceptibles de re transmettre les efforts fonctionnels souhaités. FIGS. 5a, 5b and 5c show variant embodiments of the invention. Thus, within Figure 5a, there is shown a geotextile structure comprising several tabular areas, in this case of different diameter. This variant makes it possible to provide practical and effective solutions to face fixing problems, or to make junctions with other elements. It is then possible to insert tubes, rods or metal bars for example, in these tubular zones so as to allow connections between the layers, in the longitudinal, transverse and vertical directions. Said connections are then able to transmit the desired functional forces.
Typiquement, le diamètre des zones tubulaires peut varier de quelques centimètres, par exemple de 2 à 10 centimètres, jusqu'à 50 voire 100 centimètres, en fonction des épaisseurs de couches calculées, et en fonction de la nature de l'ouvrage à renforcer. Typically, the diameter of the tubular zones may vary from a few centimeters, for example from 2 to 10 centimeters, up to 50 or even 100 centimeters, depending on the thicknesses of layers calculated, and depending on the nature of the structure to be reinforced.
Les zones tubulaires de gros diamètres sont destinées à constituer le front du massif du remblai à renforcer, et les zones tubulaires de petits diamètres sont destinés au passage de joncs ou de tubes métalliques, par exemple afin d'effectuer des accrochages de parement, et tel qu'on l'a représenté sur la figure 5c. Les zones tubulaires destinées à recevoir de tels éléments (joncs, tubes métalliques, etc ..) ne sont pas remplies par les granulats. En outre, de telles zones tubulaires additionnelles peuvent également permettre la réalisation d'un ancrage complémentaire sous la forme d'une nappe géo synthétique liaisonnée par ces moyens à la nappe d'ancrage de la structure. The tubular zones of large diameters are intended to constitute the front of the embankment mass to be reinforced, and the tubular zones of small diameters are intended for the passage of rods or metal tubes, for example in order to make skirting cladding, and such as shown in Figure 5c. The tubular zones intended to receive such elements (rods, metal tubes, etc.) are not filled by the aggregates. In addition, such additional tubular zones may also allow the realization of a complementary anchorage in the form of a geosynthetic web bonded by these means to the anchoring ply of the structure.
Différents moyens de jonctions peuvent être mis en œuvre, tels que des systèmes d'agrafes ou de crochets, comme illustrés en traits discontinus sur la figure 5c. Different junction means may be implemented, such as staple or hook systems, as shown in broken lines in Figure 5c.
Il est également envisageable de réaliser une structure géotextile présentant deux zones tubulaires extrêmes, l'une destinée, comme déjà dit, à constituer le front du massif du remblai à renforcer, l'autre à créer un ancrage en arrière du massif. It is also conceivable to produce a geotextile structure presenting two extreme tubular zones, one intended, as already stated, to constitute the front of the embankment massif to be reinforced, the other to create an anchorage behind the massif.
Ce mode de réalisation trouve application lorsque l'on dispose de peu de place pour construire ce type d'ouvrage, par exemple en zone de montagne ou sur des terrains à surface réduite ou très coûteuse. On a représenté sur la figure 6 la mise en œuvre d'une telle structure géosynthétique. Ce mode de réalisation peut également être mis en œuvre pour la réalisation de fondation sur sol meuble ou médiocre, ainsi que pour la réalisation de voie de circulation ferroviaire sans ballast, tel que par exemple illustré au sein des figures 9a, 9b et 9c. This embodiment is applicable when there is little room to build this type of work, for example in mountain areas or on land with reduced or very expensive surface. FIG. 6 shows the implementation of such a geosynthetic structure. This embodiment can also be implemented for the realization of foundation on soft or poor ground, as well as for the realization of railroad track without ballast, as for example illustrated in Figures 9a, 9b and 9c.
A titre exemplatif, on a représenté au sein des figures 8a - 8f, les différentes étapes de la réalisation d'un parement monolithique pour remblai, mettant en œuvre la structure géosynthétique de la présente invention. Ainsi, après avoir mis en place une structure géosynthétique de l'invention (figure 8a), puis recouvert la nappe d'ancrage ainsi développée d'une première couche de sol (figure 8b), et procédé à l'arasage et au compactage suivant les règles en usage du niveau zéro dudit remblai (figure 8c), on positionne au-dessus de cette première couche, une deuxième structure géosynthétique de l'invention (figure 8d). By way of example, FIGS. 8a-8f show the various steps of producing a monolithic embankment facing, implementing the geosynthetic structure of the present invention. Thus, after setting up a geosynthetic structure of the invention (FIG. 8a), then covering the anchoring layer thus developed with a first layer of soil (FIG. 8b), and proceeding to the following shaving and compaction the rules in use of the zero level of said embankment (Figure 8c), is positioned above this first layer, a second geosynthetic structure of the invention (Figure 8d).
On procède ainsi à l'empilement d'une nouvelle structure de l'invention sur la structure précédente, de manière analogue, et l'on recouvre la nouvelle nappe d'ancrage ainsi développée, selon la même direction que la nappe d'ancrage de la structure inférieure d'une nouvelle couche de sol (figures 8e et 8f). Thus, a new structure of the invention is stacked on the preceding structure in a similar manner, and the new anchoring sheet thus developed is covered in the same direction as the anchoring sheet of the lower structure of a new layer of soil (Figures 8e and 8f).
On répète l'opération précédente autant que nécessaire, jusqu'à atteindre la hauteur souhaitée du remblai. The above operation is repeated as necessary until the desired height of the embankment is reached.
Le front du remblai étant ainsi stabilisé, on procède au dépôt de parement, par exemple en béton, achevant ainsi la réalisation de l'ouvrage The front of the embankment thus being stabilized, we proceed to the deposition of facing, for example concrete, thus completing the realization of the work
On conçoit tout l'intérêt de la présente invention en raison tout d'abord, de sa simplicité de mise en œuvre : une fois la structure mise en place, il suffit de procéder à l'injection notamment par soufflage des granulats à l'intérieur des zones tabulaires, qui peut s'effectuer très rapidement, pour confier de la cohésion et de la rigidité à l'ensemble.The whole of the interest of the present invention is conceived primarily because of its simplicity of implementation: once the structure is in place, it is sufficient to proceed with the injection, in particular by blowing the aggregates inside. tabular zones, which can be done very quickly, to give cohesion and rigidity to the whole.
Ladite structure, préalablement au remplissage de la zone tubulaire, est facilement transportable sur site : elle peut notamment se présenter en rouleau, et donc d'un faible encombrement. Said structure, prior to filling the tubular zone, is easily transportable on site: it can be in particular roll, and therefore a small footprint.
CoroUairement, la structure de l'invention confère à l'ouvrage à réaliser une très grande stabilité, tant en termes de résistance mécanique que dans le temps. CoroUairement, the structure of the invention gives the structure to achieve a very high stability, both in terms of mechanical strength than in time.

Claims

REVENDICATIONS
Structure géotextile, notamment pour le renforcement et/ou la stabilisation de sols et de remblais, comprenant au moins une partie tubulaire, apte à être remplie par un matériau granulaire, confiné au sein de cette dernière, ladite partie tubulaire étant associée à une nappe d'ancrage de l'ensemble constitutif de la structure dans le sol à stabiliser, ou dans le remblai à renforcer. Geotextile structure, in particular for reinforcing and / or stabilizing soil and embankments, comprising at least one tubular part, capable of being filled with a granular material, confined within the latter, said tubular part being associated with a layer of anchoring the constituent assembly of the structure in the soil to be stabilized, or in the embankment to be reinforced.
Structure géotextile selon la revendication 1, caractérisée en ce que la partie tubulaire et la nappe d'ancrage sont constituées d'une structure unitaire tricotée, réalisée par la technologie dite « à maille jetée ». Geotextile structure according to claim 1, characterized in that the tubular portion and the anchor ply consist of a unitary knitted structure, produced by the so-called "pier stitch" technology.
Structure géotextile selon l'une des revendications 1 et 2, caractérisée en ce qu'elle est exempte de toutes coutures. Geotextile structure according to one of claims 1 and 2, characterized in that it is free of any seams.
Structure géotextile selon la revendication 3, caractérisée en ce qu'elle est réalisée sur un métier Rachel double fonture. Geotextile structure according to claim 3, characterized in that it is carried out on a Rachel double needle bed.
5. Structure géotextile selon la revendication 4, caractérisée en ce qu'elle est réalisée sur un métier Rachel double fonture avec insertion de trame, au moins sur une face, afin d'obtenir un module de déformation différent au niveau de la nappe d'ancrage. 5. Geotextile structure according to claim 4, characterized in that it is carried out on a double Rachel needle bed with insertion of weft, at least on one side, in order to obtain a different deformation module at the level of the ply. anchorage.
6. Structure géotextile selon l'une des revendications 1 et 2, caractérisée en ce que la zone tubulaire est définie au moyen de coutures. 6. Geotextile structure according to one of claims 1 and 2, characterized in that the tubular zone is defined by means of seams.
7. Structure géotextile selon l'une des revendications 1 à 6, caractérisée en ce qu'elle est réalisée en un matériau choisi dans le groupe comprenant le polypropylène, le PVA (polyvinyl acétate), l'aramide, le polyester, le polyamide, le polyéthylène, seuls ou en mélange. 7. Geotextile structure according to one of claims 1 to 6, characterized in that it is made of a material selected from the group consisting of polypropylene, PVA (polyvinyl acetate), aramid, polyester, polyamide, polyethylene, alone or as a mixture.
8. Structure géotextile selon l'une des revendications 1 à 7, caractérisée en ce que le matériau granulaire de remplissage de la partie tubulaire est constitué d'agrégats, notamment réalisés en argile expansé de faible densité. 8. Geotextile structure according to one of claims 1 to 7, characterized in that the granular filling material of the tubular portion consists of aggregates, in particular made of expanded clay low density.
Structure géotextile selon l'une des revendications 1 à 7, caractérisée en ce qu'elle comporte deux parties tubulaires séparées l'une de l'autre par la nappe d'ancrage. Geotextile structure according to one of claims 1 to 7, characterized in that it comprises two tubular parts separated from each other by the anchoring ply.
Structure géotextile selon l'une des revendications 1 à 7, caractérisée en ce qu'elle comporte plusieurs parties tubulaires, dont partie au moins reçoit un jonc, une barre, un câble, un tube métallique ou une sangle faisant fonction de moyen d'accrochage à un parement ou équivalent, ou d'un ancrage complémentaire sous la forme d'une nappe géosynthétique liaisonnée par ce moyen à la nappe d'ancrage de la structure.. Geotextile structure according to one of claims 1 to 7, characterized in that it comprises a plurality of tubular parts, at least part of which receives a rod, a bar, a cable, a metal tube or a strap acting hooking means at a facing or equivalent, or a complementary anchorage in the form of a geosynthetic layer bonded thereby to the anchoring ply of the structure.
EP13785559.9A 2012-10-23 2013-10-14 Structure with geotextile Not-in-force EP2912230B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13785559T PL2912230T3 (en) 2012-10-23 2013-10-14 Structure with geotextile

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1260057A FR2997106B1 (en) 2012-10-23 2012-10-23 GEOTEXTILE STRUCTURE, IN PARTICULAR FOR THE REINFORCEMENT AND STABILIZATION OF SOIL AND FARMS
PCT/FR2013/052451 WO2014064364A1 (en) 2012-10-23 2013-10-14 Geotextile structure

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EP2912230A1 true EP2912230A1 (en) 2015-09-02
EP2912230B1 EP2912230B1 (en) 2016-12-28

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EP (1) EP2912230B1 (en)
FR (1) FR2997106B1 (en)
PL (1) PL2912230T3 (en)
WO (1) WO2014064364A1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN111379203A (en) * 2020-04-23 2020-07-07 山东高速股份有限公司 Geogrid reinforcement and membrane bag grouting combined sedimentation device, sedimentation method and application

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2496115A1 (en) * 2005-02-08 2006-08-08 Deltalok Inc. Sandbag wall system with sandbags having a waist portion
CN201050067Y (en) * 2007-06-14 2008-04-23 张宇顺 Soil blocking structure with interlocking component

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014064364A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111379203A (en) * 2020-04-23 2020-07-07 山东高速股份有限公司 Geogrid reinforcement and membrane bag grouting combined sedimentation device, sedimentation method and application
CN111379203B (en) * 2020-04-23 2022-07-01 山东高速股份有限公司 Geogrid reinforcement and membrane bag grouting combined sedimentation device, sedimentation method and application

Also Published As

Publication number Publication date
FR2997106A1 (en) 2014-04-25
EP2912230B1 (en) 2016-12-28
FR2997106B1 (en) 2014-11-21
PL2912230T3 (en) 2017-05-31
WO2014064364A1 (en) 2014-05-01

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