EP2171160B1 - Reinforced stabilisation strip to be used in reinforced ground works - Google Patents

Reinforced stabilisation strip to be used in reinforced ground works Download PDF

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Publication number
EP2171160B1
EP2171160B1 EP08827937A EP08827937A EP2171160B1 EP 2171160 B1 EP2171160 B1 EP 2171160B1 EP 08827937 A EP08827937 A EP 08827937A EP 08827937 A EP08827937 A EP 08827937A EP 2171160 B1 EP2171160 B1 EP 2171160B1
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Prior art keywords
reinforced
strip
cord
stabilising strip
longitudinal part
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EP08827937A
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German (de)
French (fr)
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EP2171160A1 (en
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Jean-Claude Morizot
Nicolas Freitag
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Terre Armee Internationale
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Terre Armee Internationale
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    • 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
    • E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
    • E02D29/0241—Retaining or protecting walls comprising retention means in the backfill the retention means being reinforced earth elements
    • 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
    • E02D17/202—Securing of slopes or inclines with flexible securing means

Definitions

  • the present invention relates to a reinforced stabilization strip for use in reinforced soil or reinforced earth, and the use of such a strip for the construction of reinforced soil or reinforced earth.
  • a reinforced soil structure combines a compacted embankment, a siding and reinforcements connected or not to the facing.
  • reinforcements may be used: metal, for example galvanized steel, stabilizing strips for example based on polyester fibers. They are set up in the soil with a density depending on the constraints that can be exerted on the structure, the thrust forces of the ground being taken up by the friction soil-reinforcements.
  • the facing is most often made from prefabricated concrete elements in the form of slabs or blocks, juxtaposed to cover the front face of the structure.
  • the reinforcements are provided in the form of strips having a length of about 3 to 10 meters, although shorter or longer strips may be used.
  • the width of the strips is generally between 4 and 6 centimeters although it is possible to use strips of width up to 10 or 25 centimeters, see more.
  • Their thickness varies, for example, from about 1 millimeter to a few centimeters and is generally between 1 to 6 millimeters.
  • the purpose of the stabilization strips is to transmit the forces into the ground or earth and thus distribute the forces.
  • the band is capable of transmitting the forces over its entire length so it has a high tensile strength.
  • a solution known to those skilled in the art consists in using strips having a longitudinal portion in the form of a central portion to withstand a tensile force, the central portion having two lateral parts which protrude laterally from each other. another of the central portion to rub against the earth, the central portion having a set of fibers arranged parallel to each other so as to enhance the tensile strength.
  • the internal reinforcements of the strips sometimes consist of substantially parallel bundles of wires substantially parallel to each other.
  • Such an arrangement of the fibers presents risks of sliding between fibers, between fiber group and strip, and thus a degradation of the transmission of the force between the ground and the part of the tensile band.
  • An object of the present invention is to provide an alternative solution that transmits forces between a strip and the embankment in which it is placed, which has a high tensile strength and which limits the risk of sliding between fibers and between groups of fibers and tape.
  • the invention thus proposes a reinforced stabilization strip intended to be used in structures in reinforced soil, comprising all the features of claim 1, in particular a longitudinal part, said longitudinal part comprising on at least part of its length at least one rope arranged substantially longitudinally and wrapped in the volume of said longitudinal portion, and such that the material constituting the fibers or son of the rope is based on polymer, for example based on polyester.
  • the rope has a high tensile strength and increases the internal cohesion between the fibers, known effect of EN-873354 and especially of US-5,573,852 which shows a band according to the preamble of claim 1.
  • the arrangement of the fibers or son in the form of rope or rope allows better anchoring of the fibers or son within the longitudinal portion.
  • the invention also relates to the use of a stabilizing strip according to the invention for the construction of a structure in reinforced soil.
  • the invention also relates to a reinforced soil structure comprising at least one stabilizing strip according to the invention.
  • the subject of the invention is also a method for constructing a structure in reinforced soil, in which a facing is placed along a front face of the structure delimiting a volume to be filled, reinforcements are provided in an area of said volume, provides fill material in said volume and compacts the backfill material, wherein said reinforcements comprise at least one stabilizing strip according to the invention.
  • rope means an assembly, for example obtained by twisting or braiding, of at least three fibers composed of a plurality of threads or directly of at least three threads, of textile materials, synthetic, plastic, metallic or a combination of these different fibers or son. It is known to those skilled in the art that the at least three fibers composing a rope are assembled to form a stable construction.
  • the yarns within the meaning of the invention are composed of a set of monofilaments and / or staple fibers and / or fibrillated threads assembled and twisted.
  • a rope of the band according to the invention may comprise at least 3 strands, each strand being composed of a plurality of fibers assembled to form a stable construction.
  • a rope of the band according to the invention may be a braided rope according to the NF EN ISO 1968 standard, namely obtained by braiding together strands to form a stable construction that does not bend.
  • a rope of the band according to the invention may comprise several sets of fibers combining sets of parallel fibers assembled to form a stable construction, for example surrounded by woven or twisted fibers.
  • the chosen cords may for example be thin, with a diameter of the order of one millimeter or more thick with a diameter of about one centimeter.
  • longitudinal portion is the portion of the stabilization strip which extends lengthwise, along the longitudinal axis of said strip.
  • FIG. 1 a perspective view of a stabilizing strip.
  • the longitudinal portion may be of a plastic material such as polyethylene, polypropylene, PVC.
  • the rope is an assembly of three twisted fibers 16.
  • the fibers 16 constituting the rope 14 may be metallic, synthetic, polymeric for example consist of polyester, polyamide or polyolefin, or natural for example based on hemp or a combination of these different fibers.
  • said longitudinal portion 12 of the stabilizing strip 10 is in the form of a central portion 17, said central portion 17 having two side portions 18, in the form of fins, which project laterally to rub against the ground.
  • the longitudinal portion 12 extends laterally on both sides, but could as well extend only one side.
  • the rope 14 is braided from six fibers 16.
  • the fins 18 may be provided with ribs and / or corrugation and / or perforation or any other means known to those skilled in the art to improve frictional interaction with the earth.
  • the band according to the invention may comprise several ropes of the same nature or of different natures, the ropes being wrapped in the volume of the longitudinal portion 12 of said band.
  • Each cord 14 may extend over only a portion of the length of the stabilizing strip 10.
  • the ropes 14 may contain a central core in order to increase their diameters and thus the contact surface between the outer fibers and the material forming the longitudinal portion of the stabilizing strip 10.
  • the strip according to the invention may also comprise a reinforced longitudinal part with a multitude of strings, for example, thin strings distributed throughout the volume substantially homogeneously.
  • a strip according to the invention can be produced, for example, by extrusion, coextrusion, rolling or any other technique known to those skilled in the art to produce metal or polymer strips.
  • the invention also relates to a method of constructing a structure in reinforced soil.
  • FIG 4 illustrates such a method.
  • a compacted embankment 20, in which stabilizing strips 10 according to the invention are distributed, is delimited on the front side of the structure by a facing 23 constituted by juxtaposing prefabricated elements 24, and on the rear side by the ground 25. against which is erected the retaining wall.
  • the stabilizing strips 10 may be connected to the facing elements 24, and extend for a distance within the embankment 21. These stabilizing strips 10 contribute to reinforce the soil located in a reinforced zone Z on the back of the siding 23.
  • the material of the embankment 21 has a high resistance because it is reinforced by the stabilizing strips 10. It is thus able to withstand the shear stresses that are exerted due to tensile forces
  • the reinforced zone Z must naturally have a thickness sufficient to hold the facing 23 firmly.
  • the stabilizing strips 10 are integrated during the manufacture of the facing elements 24. In the frequent case where the elements 24 are prefabricated in concrete, a portion of the stabilizing strips 10 may be embedded in the molded concrete. 24. In the example of book configuration illustrated by the figure 4 the stabilizing strips 10 are arranged in horizontal planes superposed alternately on the height of the structure.
  • the strips may also make it possible to secure the cladding 24 to the wall 26 of the ground by attachment to said wall, for example by means of hooks, loops connected by nailing to the wall 26 or by any other means known to those skilled in the art.

Abstract

Reinforced stabilizing strip (10) intended for use in reinforced earth structures, comprising a longitudinal part (12), said longitudinal part (12) comprising along at least part of its length, at least one cord (14) arranged approximately longitudinally and encased in the bulk of said longitudinal part.

Description

La présente invention concerne une bande de stabilisation renforcée destinée à être utilisée dans des ouvrages en sol renforcé ou terre armée, ainsi que l'utilisation d'une telle bande pour la construction d'ouvrages en sol renforcé ou terre armée.The present invention relates to a reinforced stabilization strip for use in reinforced soil or reinforced earth, and the use of such a strip for the construction of reinforced soil or reinforced earth.

Un ouvrage en sol renforcé associe un remblai compacté, un parement et des renforcements connectés ou non au parement.A reinforced soil structure combines a compacted embankment, a siding and reinforcements connected or not to the facing.

Divers types de renforcements peuvent être utilisés: métalliques, par exemple en acier galvanisé, des bandes de stabilisation par exemple à base de fibres de polyester. Ils sont mis en place dans le sol avec une densité dépendant des contraintes pouvant s'exercer sur l'ouvrage, les efforts de poussée du terrain étant repris par le frottement sol-renforcements.Various types of reinforcements may be used: metal, for example galvanized steel, stabilizing strips for example based on polyester fibers. They are set up in the soil with a density depending on the constraints that can be exerted on the structure, the thrust forces of the ground being taken up by the friction soil-reinforcements.

Le parement est le plus souvent réalisé à partir d'éléments préfabriqués en béton, en forme de dalles ou de blocs, juxtaposés pour recouvrir la face frontale de l'ouvrage.The facing is most often made from prefabricated concrete elements in the form of slabs or blocks, juxtaposed to cover the front face of the structure.

Dans la grande majorité de cas, les renforcements sont fournis sous forme de bandes ayant une longueur d'environ 3 à 10 mètres, bien que des bandes plus courtes ou plus longues puissent être employées. La largeur des bandes est généralement comprise entre 4 et 6 centimètres bien qu'il soit possible d'employer des bandes de largeur allant jusqu'à 10 ou 25 centimètres, voir d'avantage. Leur épaisseur varie, par exemple, d'environ 1 millimètre à quelques centimètres et est généralement comprise entre 1 à 6 millimètres.In the vast majority of cases, the reinforcements are provided in the form of strips having a length of about 3 to 10 meters, although shorter or longer strips may be used. The width of the strips is generally between 4 and 6 centimeters although it is possible to use strips of width up to 10 or 25 centimeters, see more. Their thickness varies, for example, from about 1 millimeter to a few centimeters and is generally between 1 to 6 millimeters.

Il existe des bandes de stabilisation non renforcée ou renforcée au moyen de tiges métalliques ou encore de fibres ou fils parallèles.There are stabilization bands unreinforced or reinforced by means of metal rods or even fibers or parallel son.

Le but des bandes de stabilisation est de transmettre les forces dans le sol ou la terre et ainsi de distribuer les efforts.The purpose of the stabilization strips is to transmit the forces into the ground or earth and thus distribute the forces.

En particulier, il est nécessaire de transmettre les forces entre une bande et le remblai dans lequel elle est placée. La bande doit donc avoir une superficie suffisante pour développer par le frottement la résistance au cisaillement exigée par unité de longueur.In particular, it is necessary to transmit forces between a strip and the embankment in which it is placed. The strip must therefore have a sufficient area to develop by friction the required shear strength per unit length.

D'autre part, de préférence la bande est capable de transmettre les efforts sur toute sa longueur elle présente donc une grande résistance à la traction.On the other hand, preferably the band is capable of transmitting the forces over its entire length so it has a high tensile strength.

Une solution connue de l'homme du métier consiste à utiliser des bandes comportant une partie longitudinale sous la forme d'une partie centrale pour résister à une force de traction, la partie centrale ayant deux parties latérales qui font saillies latéralement de part et d'autre de la partie centrale pour frotter contre la terre, la partie centrale comportant un ensemble des fibres disposées parallèlement entre elles de manière à renforcer la résistance à la traction.A solution known to those skilled in the art consists in using strips having a longitudinal portion in the form of a central portion to withstand a tensile force, the central portion having two lateral parts which protrude laterally from each other. another of the central portion to rub against the earth, the central portion having a set of fibers arranged parallel to each other so as to enhance the tensile strength.

Une autre solution consiste à utiliser des bandes parallélépipédiques de polyéthylène renforcées de fibres de polyester disposées parallèlement entre elles dans le volume de ladite bande. L'art antérieur le plus pertinent est décrit dans les documents WO-A-95/11351 et DE-A-3 728 255 .Another solution is to use parallelepiped strips of polyethylene reinforced with polyester fibers arranged parallel to each other in the volume of said strip. The most relevant prior art is described in the documents WO-A-95/11351 and DE-A-3,728,255 .

Dans l'art antérieur, les renforcements interne des bandes sont parfois constitués de faisceaux sensiblement parallèles de fils sensiblement parallèles entre eux. Une telle disposition des fibres présente des risques de glissement entre fibres, entre groupe de fibres et bande, et ainsi une dégradation de la transmission de l'effort entre le sol et la partie de la bande résistant à la traction.In the prior art, the internal reinforcements of the strips sometimes consist of substantially parallel bundles of wires substantially parallel to each other. Such an arrangement of the fibers presents risks of sliding between fibers, between fiber group and strip, and thus a degradation of the transmission of the force between the ground and the part of the tensile band.

Un but de la présente invention est de proposer une autre solution qui permette de transmettre les forces entre une bande et le remblai dans lequel elle est placée, qui présente une grande résistance à la traction et qui limite le risque de glissement entre fibres et entre groupe de fibres et bande.An object of the present invention is to provide an alternative solution that transmits forces between a strip and the embankment in which it is placed, which has a high tensile strength and which limits the risk of sliding between fibers and between groups of fibers and tape.

L'invention propose ainsi une bande de stabilisation renforcée destinée à être utilisée dans des ouvrages en sol renforcé, comprenant toutes les caractéristiques de la revendication 1, notamment une partie longitudinale, ladite partie longitudinale comprenant sur au moins une partie de sa longueur au moins une corde disposée de manière sensiblement longitudinale et enveloppée dans le volume de ladite partie longitudinale, et telle que la matière constituant les fibres ou fils de la corde est à base de polymère, par exemple à base de polyester.The invention thus proposes a reinforced stabilization strip intended to be used in structures in reinforced soil, comprising all the features of claim 1, in particular a longitudinal part, said longitudinal part comprising on at least part of its length at least one rope arranged substantially longitudinally and wrapped in the volume of said longitudinal portion, and such that the material constituting the fibers or son of the rope is based on polymer, for example based on polyester.

Avantageusement, la corde présente une grande résistance à la traction et augmente la cohésion interne entre les fibres, effet connu de FR-873354 et surtout de US-5 573 852 qui montre une bande selon le préambule de la revendication 1. De plus, la disposition des fibres ou fils sous la forme de corde ou de cordage permet un meilleur ancrage des fibres ou fils à l'intérieur de la partie longitudinale.Advantageously, the rope has a high tensile strength and increases the internal cohesion between the fibers, known effect of EN-873354 and especially of US-5,573,852 which shows a band according to the preamble of claim 1. In addition, the arrangement of the fibers or son in the form of rope or rope allows better anchoring of the fibers or son within the longitudinal portion.

Une bande de stabilisation selon l'invention peut en outre comporter l'une ou plusieurs des caractéristiques optionnelles ci-dessous, considérées individuellement ou selon toutes les combinaisons possibles :

  • la matière constituant ladite partie longitudinale est à base de polymères, par exemple à base de polyéthylène ;
  • ladite partie longitudinale se présente sous la forme d'au moins une partie centrale, ladite partie centrale ayant au moins une partie latérale qui fait saillie latéralement sur la partie longitudinale pour frotter contre la terre ;
  • la partie latérale s'étend longitudinalement ;
  • la partie longitudinale comporte plusieurs parties centrales reliées les unes aux autres par une partie latérale ;
  • la corde comprend une âme centrale.
Selon l'invention, la corde est une corde tressée à partir d'au moins trois fibres, en particulier à partir d'au moins six fibres.A stabilizing strip according to the invention may further comprise one or more of the optional features below, considered individually or according to all the possible combinations:
  • the material constituting said longitudinal portion is based on polymers, for example based on polyethylene;
  • said longitudinal portion is in the form of at least a central portion, said central portion having at least one lateral portion that protrudes laterally on the longitudinal portion to rub against the earth;
  • the lateral part extends longitudinally;
  • the longitudinal part comprises several central parts connected to each other by a lateral part;
  • the rope includes a central soul.
According to the invention, the rope is a rope braided from at least three fibers, in particular from at least six fibers.

L'invention a également pour objet l'utilisation d'une bande de stabilisation selon l'invention pour la construction d'un ouvrage en sol renforcé.The invention also relates to the use of a stabilizing strip according to the invention for the construction of a structure in reinforced soil.

L'invention se rapporte aussi à un ouvrage en sol renforcé comportant au moins une bande de stabilisation selon l'invention.The invention also relates to a reinforced soil structure comprising at least one stabilizing strip according to the invention.

L'invention a également pour objet un procédé de construction d'un ouvrage en sol renforcé, dans lequel on dispose un parement suivant une face frontale de l'ouvrage délimitant un volume à remblayer, on dispose des renforcements dans une zone dudit volume, on apporte du matériau de remblai dans ledit volume et on compacte le matériau de remblai, où lesdits renforcements comprennent au moins une bande de stabilisation selon l'invention.The subject of the invention is also a method for constructing a structure in reinforced soil, in which a facing is placed along a front face of the structure delimiting a volume to be filled, reinforcements are provided in an area of said volume, provides fill material in said volume and compacts the backfill material, wherein said reinforcements comprise at least one stabilizing strip according to the invention.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés dans lesquels:

  • la figure 1 est une vue en perspective d'un example de bande connue avec une corde torsadée;
  • la figure 2 est une vue en perspective d'un mode de réalisation avec une corde tressée;
  • la figure 3 est une vue en perspective d'un deuxième mode de réalisation avec deux cordes différentes;
  • la figure 4 une vue schématique en coupe latérale d'un ouvrage en sol renforcé selon l'invention en cours de réalisation.
The invention will be better understood on reading the description which follows, given solely for example and made with reference to the accompanying drawings in which:
  • the figure 1 is a perspective view of a known tape example with a twisted rope;
  • the figure 2 is a perspective view of an embodiment with a braided rope;
  • the figure 3 is a perspective view of a second embodiment with two different ropes;
  • the figure 4 a schematic side sectional view of a reinforced soil structure according to the invention in progress.

Au sens de l'invention, on entend par « corde » un assemblage, par exemple obtenu par torsion ou tressage, d'au moins trois fibres composées d'une pluralité de fils ou directement d'au moins trois fils, de matières textiles, synthétiques, plastiques, métalliques ou d'une combinaison de ces différentes fibres ou fils. Il est connu de l'homme du métier que les au moins trois fibres composant une corde sont assemblées de manière à former une construction stable.For the purposes of the invention, the term "rope" means an assembly, for example obtained by twisting or braiding, of at least three fibers composed of a plurality of threads or directly of at least three threads, of textile materials, synthetic, plastic, metallic or a combination of these different fibers or son. It is known to those skilled in the art that the at least three fibers composing a rope are assembled to form a stable construction.

Les fils au sens de l'invention sont composés d'un ensemble de mono filaments et/ou de fibres discontinues et/ou de fils fibrillés assemblés et retordus.The yarns within the meaning of the invention are composed of a set of monofilaments and / or staple fibers and / or fibrillated threads assembled and twisted.

Une corde de la bande selon l'invention peut comprendre au moins 3 torons, chaque toron étant composé d'une pluralité de fibres assemblées de manière à former une construction stable.A rope of the band according to the invention may comprise at least 3 strands, each strand being composed of a plurality of fibers assembled to form a stable construction.

Une corde de la bande selon l'invention peut être une corde tressée au sens de la norme NF EN ISO 1968, à savoir obtenue en tressant ensemble des torons pour former une construction stable qui ne se détorde pas.A rope of the band according to the invention may be a braided rope according to the NF EN ISO 1968 standard, namely obtained by braiding together strands to form a stable construction that does not bend.

Une corde de la bande selon l'invention peut comprendre plusieurs ensembles de fibres combinant des ensembles de fibres parallèles assemblées de manière à former une construction stable, par exemple entourées de fibres tissées ou tordues.A rope of the band according to the invention may comprise several sets of fibers combining sets of parallel fibers assembled to form a stable construction, for example surrounded by woven or twisted fibers.

Les cordes choisies peuvent par exemple être fines, avec un diamètre de l'ordre du millimètre ou plus épaisses avec un diamètre de l'ordre du centimètre.The chosen cords may for example be thin, with a diameter of the order of one millimeter or more thick with a diameter of about one centimeter.

Pour des raisons de clarté, les différents éléments représentés sur les figures ne sont pas nécessairement à l'échelle.For the sake of clarity, the different elements shown in the figures are not necessarily to scale.

On entend par « partie longitudinale » la partie de la bande de stabilisation qui s'étend dans le sens de la longueur, le long de l'axe longitudinal de ladite bande.The term "longitudinal portion" is the portion of the stabilization strip which extends lengthwise, along the longitudinal axis of said strip.

On a représenté sur la figure 1 une vue en perspective d'une bande de stabilisation.We have shown on the figure 1 a perspective view of a stabilizing strip.

Dans cet exemple de bande de stabilisation renforcée 10 connue comprenant une partie longitudinale 12 comprenant sur toute sa longueur une corde 14, ladite corde 14 est enveloppée dans le volume de ladite partie longitudinale 12.In this example of known reinforced stabilizing strip 10 comprising a longitudinal portion 12 comprising along its length a rope 14, said rope 14 is wrapped in the volume of said longitudinal portion 12.

La partie longitudinale peut être en un matériau plastique tel que le polyéthylène, le polypropylène, le PVC.The longitudinal portion may be of a plastic material such as polyethylene, polypropylene, PVC.

Dans cet exemple, la corde est un assemblage de trois fibres 16 torsadées. Les fibres 16 composant la corde 14 peuvent être métalliques, synthétiques, polymériques par exemple se composer de polyester, de polyamide ou de polyoléfine, ou encore naturel par exemple à base de chanvre ou d'une combinaison de ces différentes fibres.In this example, the rope is an assembly of three twisted fibers 16. The fibers 16 constituting the rope 14 may be metallic, synthetic, polymeric for example consist of polyester, polyamide or polyolefin, or natural for example based on hemp or a combination of these different fibers.

Dans un premier mode de réalisation, représenté à la figure 2, ladite partie longitudinale 12, de la bande de stabilisation 10 selon l'invention, se présente sous la forme d'une partie centrale 17, ladite partie centrale 17 ayant deux parties latérales 18, sous forme d'ailettes, qui font saillie latéralement pour frotter contre la terre.In a first embodiment, represented at figure 2 said longitudinal portion 12 of the stabilizing strip 10 according to the invention is in the form of a central portion 17, said central portion 17 having two side portions 18, in the form of fins, which project laterally to rub against the ground.

La partie longitudinale 12 se prolonge latéralement des deux côtés, mais pourrait aussi bien ne se prolonger que d'un seul côté.The longitudinal portion 12 extends laterally on both sides, but could as well extend only one side.

Dans ce mode de réalisation, la corde 14 est tressée, à partir de six fibres 16.In this embodiment, the rope 14 is braided from six fibers 16.

Les ailettes 18 peuvent être pourvues de nervures et/ou d'ondulation et/ou de perforation ou de tout autre moyen connu de l'homme du métier pour améliorer l'interaction par frottement avec la terre.The fins 18 may be provided with ribs and / or corrugation and / or perforation or any other means known to those skilled in the art to improve frictional interaction with the earth.

Selon un autre mode de réalisation représenté à la figure 3, la bande selon l'invention peut comporter plusieurs cordes de même nature ou de natures différentes, les cordes étant enveloppées dans le volume de la partie longitudinale 12 de ladite bande.According to another embodiment shown in figure 3 , the band according to the invention may comprise several ropes of the same nature or of different natures, the ropes being wrapped in the volume of the longitudinal portion 12 of said band.

Chaque corde 14 pouvant s'étendre sur une partie seulement de la longueur de la bande de stabilisation 10.Each cord 14 may extend over only a portion of the length of the stabilizing strip 10.

Les cordes 14 peuvent contenir une âme centrale afin d'augmenter leurs diamètres et ainsi la surface de contact entre les fibres extérieures et le matériau composant la partie longitudinale de la bande de stabilisation 10.The ropes 14 may contain a central core in order to increase their diameters and thus the contact surface between the outer fibers and the material forming the longitudinal portion of the stabilizing strip 10.

La bande selon l'invention peut également comprendre une partie longitudinale renforcée avec une multitude de cordes, par exemple, des cordes fines réparties dans tout le volume de manière sensiblement homogène.The strip according to the invention may also comprise a reinforced longitudinal part with a multitude of strings, for example, thin strings distributed throughout the volume substantially homogeneously.

Une bande selon l'invention peut être produite, par exemple, par extrusion, co-extrusion, laminage ou toute autre technique connu de l'homme du métier pour produire des bandes de métal ou de polymère.A strip according to the invention can be produced, for example, by extrusion, coextrusion, rolling or any other technique known to those skilled in the art to produce metal or polymer strips.

L'invention concerne aussi un procédé de construction d'un ouvrage en sol renforcé.The invention also relates to a method of constructing a structure in reinforced soil.

La figure 4 illustre un tel procédé. Un remblai compacté 20, dans lequel sont distribuées des bandes de stabilisation selon l'invention 10, est délimité sur le côté frontal de l'ouvrage par un parement 23 constitué en juxtaposant des éléments préfabriqués 24, et sur le côté arrière par le terrain 25 contre lequel est érigé le mur de soutènement.The figure 4 illustrates such a method. A compacted embankment 20, in which stabilizing strips 10 according to the invention are distributed, is delimited on the front side of the structure by a facing 23 constituted by juxtaposing prefabricated elements 24, and on the rear side by the ground 25. against which is erected the retaining wall.

Pour assurer la cohésion du mur de soutènement, les bandes de stabilisation 10 peuvent être connectées aux éléments de parement 24, et s'étendre sur une certaine distance au sein du remblai 21. Ces bandes de stabilisation 10 contribuent à renforcer le sol situé dans une zone renforcée Z au dos du parement 23.To ensure the cohesion of the retaining wall, the stabilizing strips 10 may be connected to the facing elements 24, and extend for a distance within the embankment 21. These stabilizing strips 10 contribute to reinforce the soil located in a reinforced zone Z on the back of the siding 23.

Dans cette zone renforcée Z, le matériau du remblai 21 présente une grande résistance du fait qu'il est renforcé par les bandes de stabilisation 10. Il est ainsi en mesure de soutenir les contraintes de cisaillement qui s'exercent du fait des efforts de traction subis par les bandes de stabilisation 10. Cette zone renforcée Z doit naturellement avoir une épaisseur suffisante pour bien tenir le parement 23.In this reinforced zone Z, the material of the embankment 21 has a high resistance because it is reinforced by the stabilizing strips 10. It is thus able to withstand the shear stresses that are exerted due to tensile forces The reinforced zone Z must naturally have a thickness sufficient to hold the facing 23 firmly.

La simple connexion de bandes de stabilisation au dos des éléments de parement 24 permet ainsi de maintenir le parement appliqué contre des remblais pouvant être de grand volume.The simple connection of stabilizing strips on the back of the facing elements 24 thus makes it possible to maintain the facing applied against embankments that can be of large volume.

Dans une réalisation possible, les bandes de stabilisation 10 sont intégrées lors de la fabrication des éléments de parement 24. Dans le cas fréquent où les éléments 24 sont préfabriqués en béton, une partie des bandes de stabilisation 10 peut être noyée dans le béton moulé d'un élément 24. Dans l'exemple de configuration d'ouvrage illustré par la figure 4, les bandes de stabilisation 10 sont disposées dans des plans horizontaux superposés en alternance sur la hauteur de l'ouvrage.In one possible embodiment, the stabilizing strips 10 are integrated during the manufacture of the facing elements 24. In the frequent case where the elements 24 are prefabricated in concrete, a portion of the stabilizing strips 10 may be embedded in the molded concrete. 24. In the example of book configuration illustrated by the figure 4 the stabilizing strips 10 are arranged in horizontal planes superposed alternately on the height of the structure.

Pour édifier l'ouvrage présenté sur la figure 4, on peut procéder comme suit:

  1. a) mettre en place une partie des éléments de parement 24 afin d'être en mesure d'apporter ensuite du matériau de remblai sur une certaine hauteur. De façon connue, le montage et le positionnement des éléments de parement peuvent être facilités par des organes d'assemblage placés entre eux;
  2. b) installer les bandes de stabilisation 10 sur le remblai déjà présent en exerçant sur elles une légère traction ;
  3. c) apporter du matériau de remblai par-dessus la couche de bandes de stabilisation 10 qui vient d'être installée, jusqu'au prochain niveau de bandes de stabilisation 10 sur le côté arrière des éléments de parement 24. Ce matériau de remblai est compacté au fur et à mesure de son apport;
  4. d) répéter les étapes a) à c) jusqu'à atteindre le niveau supérieur du remblai.
To build the book presented on the figure 4 we can proceed as follows:
  1. a) set up a portion of the facing elements 24 to be able to then bring backfill material to a certain height. In known manner, the mounting and positioning of the facing elements can be facilitated by connecting members placed between them;
  2. b) install the stabilizing strips 10 on the embankment already present by exerting a slight pull on them;
  3. c) providing backfill material over the newly installed stabilizing strip layer 10 to the next level of stabilizing strips 10 on the back side of the facing elements 24. This backfill material is compacted as and when his contribution;
  4. d) Repeat steps a) to c) until the top level of the embankment is reached.

Il est à noter que de très nombreuses variantes peuvent être apportées à la structure précédemment décrite et à son procédé de réalisation, dans les limites fixées par les revendications.It should be noted that many variations can be made to the previously described structure and its method of production, within the limits set by the claims.

Il est également possible de mettre en oeuvre le procédé selon l'invention avec des bandes disposées en zigzag. Les bandes peuvent également permettre de solidariser le parement 24 à la paroi 26 du terrain par fixation à ladite paroi, par exemple grâce à des crochets, boucles reliées par cloutage à la paroi 26 ou par tout autre moyen connu de l'homme du métier.It is also possible to implement the method according to the invention with bands arranged in zigzag. The strips may also make it possible to secure the cladding 24 to the wall 26 of the ground by attachment to said wall, for example by means of hooks, loops connected by nailing to the wall 26 or by any other means known to those skilled in the art.

L'invention ne se limite pas à ces types de réalisation et doit être interprétée de façon limitée par le jeu de revendications et englobant tout mode de réalisation équivalent qui serait couvert par les revendications.The invention is not limited to these types of embodiments and must be interpreted in a limited way by the set of claims and encompassing any equivalent embodiment that would be covered by the claims.

Claims (10)

  1. Reinforced stabilising strip (10) intended for use in reinforced earth structures, comprising a longitudinal part (12), said longitudinal part (12) comprising along at least part of its length, at least one cord (14) arranged approximately longitudinally and embedded in the bulk of said longitudinal part, characterized in that the material forming the fibres or yarn of the cord is polymer-based and in that the cord (14) is a cord twisted from at least three fibres (16).
  2. Stabilising strip (10) according to claim 1, characterised in that the material forming the longitudinal part is polymer-based, for example polyethylene-based.
  3. Stabilising strip (10) according to any one of the previous claims, characterised in that said longitudinal part (12) is presented in the form of at least one central part (17), said central part (17) having at least one lateral part (18) that protrudes laterally along the longitudinal part to rub against the earth.
  4. Stabilising strip (10) according to claim 4, in which the lateral part (18) extends longitudinally.
  5. Stabilising strip (10) according to any one of the previous claims, in which the longitudinal part (12) comprises several central parts (17) connected to each other by a lateral part.
  6. Stabilising strip (10) according to any one of the previous claims, in which the cord (14) is a cord plaited from at least six fibres (16).
  7. Stabilising strip (10) according to any one of the previous claims, in which the cord (14) comprises a central core.
  8. Use of a stabilising strip (10) according to any one of the previous claims for the construction of a reinforced earth structure.
  9. Reinforced earth structure comprising at least one stabilising strip (10) according to any one of claims 1 to 7.
  10. Construction method for a reinforced earth structure, in which a facing (24) is arranged over a front surface of the structure delimiting a volume to be backfilled, reinforcements (10) are arranged in one zone of said volume, backfill material (21) is placed in said volume and the backfill material (21) is compacted, characterised in that said reinforcements (10) comprise at least one stabilising strip (10) according to any one of claims 1 to 7.
EP08827937A 2007-07-31 2008-07-24 Reinforced stabilisation strip to be used in reinforced ground works Active EP2171160B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0705580A FR2919631B1 (en) 2007-07-31 2007-07-31 REINFORCED STABILIZING STRIP INTENDED FOR USE IN REINFORCED STRUCTURED WORKS
PCT/FR2008/051397 WO2009024700A1 (en) 2007-07-31 2008-07-24 Reinforced stabilisation strip to be used in reinforced ground works

Publications (2)

Publication Number Publication Date
EP2171160A1 EP2171160A1 (en) 2010-04-07
EP2171160B1 true EP2171160B1 (en) 2011-04-20

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EP08827937A Active EP2171160B1 (en) 2007-07-31 2008-07-24 Reinforced stabilisation strip to be used in reinforced ground works

Country Status (10)

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US (1) US8182177B2 (en)
EP (1) EP2171160B1 (en)
JP (1) JP5073823B2 (en)
KR (1) KR20100071967A (en)
AT (1) ATE506490T1 (en)
BR (1) BRPI0814454B1 (en)
DE (1) DE602008006407D1 (en)
FR (1) FR2919631B1 (en)
MX (1) MX2010001286A (en)
WO (1) WO2009024700A1 (en)

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US8632278B2 (en) * 2010-06-17 2014-01-21 T & B Structural Systems Llc Mechanically stabilized earth welded wire facing connection system and method
US8632282B2 (en) * 2010-06-17 2014-01-21 T & B Structural Systems Llc Mechanically stabilized earth system and method
US8734059B2 (en) * 2010-06-17 2014-05-27 T&B Structural Systems Llc Soil reinforcing element for a mechanically stabilized earth structure
US8632280B2 (en) * 2010-06-17 2014-01-21 T & B Structural Systems Llc Mechanically stabilized earth welded wire facing connection system and method
RU2459040C9 (en) * 2011-02-28 2013-07-20 Закрытое акционерное общество "ПРЕСТО-РУСЬ" Innovative spatially polymer grid (versions)
RU2474637C2 (en) * 2011-02-28 2013-02-10 Закрытое акционерное общество "ПРЕСТО-РУСЬ" Innovation polymer tape (versions) and tape made of it
FR3016904B1 (en) * 2014-01-27 2016-02-05 Terre Armee Int REINFORCED STABILIZATION STRIP FOR REINFORCED REINFORCING ARTICLES WITH FUNCTIONALIZED SHEATH
RU2625058C1 (en) * 2016-08-26 2017-07-11 Общество с ограниченной ответственностью "Мики" Reinforced geogrid and method of its production
US10577772B1 (en) * 2019-02-13 2020-03-03 Big R Manufacturing, Llc Soil reinforcing elements for mechanically stabilized earth structures
RU2760449C1 (en) * 2021-05-21 2021-11-25 Михаил Михайлович Азарх Flexible strip of polymeric material containing reinforcing elements, a method of its manufacture and a three dimensional celled structure made with its use

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FR2325778A1 (en) * 1975-09-26 1977-04-22 Vidal Henri REINFORCEMENT FOR WORK IN ARMED EARTH
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ZA963715B (en) * 1995-05-12 1996-11-20 Tensar Corp Bonded composite open mesh structural textiles
US5795835A (en) * 1995-08-28 1998-08-18 The Tensar Corporation Bonded composite knitted structural textiles
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FR2922235B1 (en) * 2007-10-16 2009-12-18 Terre Armee Int STABILIZING STRIP INTENDED FOR USE IN STRENGTHENED SOIL WORKS

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DE602008006407D1 (en) 2011-06-01
ATE506490T1 (en) 2011-05-15
KR20100071967A (en) 2010-06-29
BRPI0814454A2 (en) 2015-01-06
US20100254770A1 (en) 2010-10-07
BRPI0814454B1 (en) 2018-12-26
WO2009024700A1 (en) 2009-02-26
EP2171160A1 (en) 2010-04-07
JP2010535299A (en) 2010-11-18
FR2919631A1 (en) 2009-02-06
FR2919631B1 (en) 2013-08-09
WO2009024700A9 (en) 2009-04-16
JP5073823B2 (en) 2012-11-14
US8182177B2 (en) 2012-05-22
MX2010001286A (en) 2010-07-30

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