EP0373041A1 - Process for constructing a reinforced road using a prefabricated metallic structure - Google Patents
Process for constructing a reinforced road using a prefabricated metallic structure Download PDFInfo
- Publication number
- EP0373041A1 EP0373041A1 EP89403316A EP89403316A EP0373041A1 EP 0373041 A1 EP0373041 A1 EP 0373041A1 EP 89403316 A EP89403316 A EP 89403316A EP 89403316 A EP89403316 A EP 89403316A EP 0373041 A1 EP0373041 A1 EP 0373041A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reinforcement
- thickness
- road
- constructing
- roadway
- 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.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/16—Reinforcements
- E01C11/165—Reinforcements particularly for bituminous or rubber- or plastic-bound pavings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/005—Methods or materials for repairing pavings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/006—Foundations for pavings made of prefabricated single units
Definitions
- the present invention relates to a method of constructing a reinforced pavement using a prefabricated metal structure.
- the invention relates to the development of a new process for the construction of a pavement for heavy traffic based on a semi-rigid metallic type honeycomb structure incorporated in a road material.
- the object of the invention is in particular to: - significantly reduce the overall thickness of a new road structure; - give the pavement layer considered a better ability to withstand repeated loads by increasing the modulus and the fatigue limit; - reduce the vertical or horizontal constraints transmitted to the other layers; - allow interesting reinforcement solutions while retaining small thicknesses; - allow the construction of industrial floors; - avoid rutting; and - prevent the rise of shrinkage cracks in semi-rigid and rigid pavements.
- heavy traffic pavement structures are made using: either very thick materials, either high modulus composite materials, or reinforced concrete structures.
- the construction of a pavement structure is proposed, in particular for heavy traffic, of small thickness, by means of a prefabricated metal frame.
- the subject of the invention is therefore a method of constructing a pavement or a reinforced track, characterized in that a prefabricated semi-rigid cellular metal structure serving as reinforcement is used, at the bottom of at least one layers forming the structure of this roadway or this road, the structure being embedded in a mix with an additional thickness of at least 1 cm.
- This alveolar metallic structure serving as a reinforcement is of the semi-rigid type, prefabricated and assembled from sheet or strip of steel or steel alloy from 10 to 50 / 10th mm, preferably 12 to 15 / 10th mm thick.
- the strip is cut, folded and assembled by stapling or welding to reveal the honeycomb structure.
- the reinforcement can be produced by assembling rectangular structural elements for the straight alignment zones, but also in trapezoids to match the turn shapes.
- the maximum dimension of these elements will most often be limited to 12 m x 2.40 for reasons of ease of transport, but nothing prevents the modification of these dimensions.
- the thickness (i.e. the height) of the reinforcement can be variable to take account of platform and traffic data, but the most common thicknesses are between 1 and 5 cm, preferably between 2 , 5 and 4 cm.
- the wall of the material forming the reinforcement can be pierced with bordered holes in order to give rigidity and possibilities of attachment of the mix by friction, but any other embodiment making it possible to improve friction can be used.
- the honeycomb structure can be in particular honeycomb (hexagonal pattern), but other geometric patterns (rectangles, squares, diamonds, circles, etc.) can be used.
- the size of the cells generally varies from 5 to 25 cm, preferably from 12 to 20 cm, which allows the support of an axle of 13 t., But it is not excluded for specific uses (airport; runway tanks, railways, etc.) to increase or decrease this dimension.
- the reinforcing elements arriving by semi-trailer on the site can be unloaded by small cranes and set up by the same handling means.
- the assembly of the elements can be carried out in several ways (bolting, stapling, welding, buttoning etc ...), this work can be manual on small sites or perfectly automated. In some cases it will be possible to carry out a stapling by jumpers stuck in the support layer. No joints, construction or expansion are planned. The structure thus produced is deformable in all dimensions and can therefore absorb the stresses exerted thereon by itself. On the other hand, the implementation team must respect, at the level of the layout, the layout plan studied.
- the metal structure may be protected or coated on the surface, in the factory or on site, against any corrosive agent, or in order to improve the bond with the filling materials.
- the reinforcement according to the invention can be used in any of the traditional layers of the road, that is to say in the foundation layer, the base layer or the wearing course or several layers, according to traffic and according to the state of the form layer. In the event of a roadway repair, it will generally suffice to install the reinforcement in the wearing course.
- the reinforcement will be placed on the previous layer, coated with a thin bonding layer (less than 1mm), then included in the filling material which is finally compacted.
- EXAMPLE 1 Realization of a wearing course in maintenance.
- a roadway is being repaired, all of which is surmounted by a layer of highly degraded asphalt, at the exit of an industrial warehouse (many heavy goods vehicles at reduced speed).
- EXAMPLE 2 Creation of a base layer in new pavement.
- Example 1b On a 0 / 31.5 mm non-treated gravel foundation layer of the GRH type (reconstituted humidified gravel), a reinforcement of the same structure is applied as in Example 1b) above.
- An impregnation layer (bitumen emulsion) is used, then a traditional asphalt 0/20 bituminous asphalt over a thickness of 10 cm embedding the reinforcement at the finisher.
- a 4 cm wearing course is made of Compolfex R (from SCREG Roads and Public Works).
- the pavement thus produced showed great resistance to the passage of heavy goods vehicles.
Abstract
Description
La présente invention concerne un procédé de construction d'une chaussée armée utilisant une structure métallique préfabriquée.The present invention relates to a method of constructing a reinforced pavement using a prefabricated metal structure.
Plus précisément l'invention se rapporte à la mise au point d'un procédé nouveau de construction de chaussée pour trafic lourd à base d'une structure alvéolaire de type métallique semi-rigide incorporée dans un matériau routier.More precisely, the invention relates to the development of a new process for the construction of a pavement for heavy traffic based on a semi-rigid metallic type honeycomb structure incorporated in a road material.
L'invention a notamment pour but de :
- diminuer de façon significaive l'épaisseur globale d'une structure routière neuve;
- donner à la couche de chaussée considérée une meilleure capacité à supporter les charges répétées en augmentant le module et la limite de fatigue;
- diminuer les contraintes verticales ou horizontales transmises aux autres couches;
- permettre des solutions de renforcement intéressantes tout en conservant de faibles épaisseurs;
- permettre de construire des sols industriels;
- éviter l'orniérage; et
- empêcher la remontée des fissures de retrait dans les chaussées semi-rigides et rigides.The object of the invention is in particular to:
- significantly reduce the overall thickness of a new road structure;
- give the pavement layer considered a better ability to withstand repeated loads by increasing the modulus and the fatigue limit;
- reduce the vertical or horizontal constraints transmitted to the other layers;
- allow interesting reinforcement solutions while retaining small thicknesses;
- allow the construction of industrial floors;
- avoid rutting; and
- prevent the rise of shrinkage cracks in semi-rigid and rigid pavements.
Actuellement les structures de chaussées pour trafic lourd sont réalisées en utilisant :
soit de fortes épaisseurs de matériaux,
soit des matériaux composites à fort module,
soit des structures en béton armé.Currently, heavy traffic pavement structures are made using:
either very thick materials,
either high modulus composite materials,
or reinforced concrete structures.
Selon l'invention on propose la construction d'une structure de chaussée notamment pour trafic lourd, en faible épaisseur, au moyen d'une armature métallique préfabriquée.According to the invention, the construction of a pavement structure is proposed, in particular for heavy traffic, of small thickness, by means of a prefabricated metal frame.
L'invention a donc pour objet un procédé de construction de chaussée ou de voie armée, caractérisé en ce que l'on met en oeuvre une structure métallique alvéolaire semi-rigide préfabriquée servant d'armature, à la partie inférieure d'au moins une des couches formant la structure de cette chaussée ou de cette voie, la structure étant noyée dans un enrobé avec une surépaisseur d'au moins 1 cm.The subject of the invention is therefore a method of constructing a pavement or a reinforced track, characterized in that a prefabricated semi-rigid cellular metal structure serving as reinforcement is used, at the bottom of at least one layers forming the structure of this roadway or this road, the structure being embedded in a mix with an additional thickness of at least 1 cm.
Cette structure métallique alvéolaire servant d'armature est du type semi-rigide, préfabriquée et assemblée à partir de tôle ou feuillard d'acier ou d'alliage d'acier de 10 à 50/10e mm, de préférence 12 à 15/10e mm d'épaisseur.This alveolar metallic structure serving as a reinforcement is of the semi-rigid type, prefabricated and assembled from sheet or strip of steel or steel alloy from 10 to 50 / 10th mm, preferably 12 to 15 / 10th mm thick.
Le feuillard est découpé, plié et assemblé par agrafage ou soudage pour faire apparaître la structure alvéolaire.The strip is cut, folded and assembled by stapling or welding to reveal the honeycomb structure.
L'armature peut être réalisée par assemblage d'éléments de structure rectangulaires pour les zones d'alignement droit, mais également en trapèzes pour épouser les formes de virage. La dimension maximale de ces éléments sera le plus souvent limitée à 12 m x 2,40 pour des questions de facilité de transport, mais rien ne s'oppose à la modification de ces dimensions.The reinforcement can be produced by assembling rectangular structural elements for the straight alignment zones, but also in trapezoids to match the turn shapes. The maximum dimension of these elements will most often be limited to 12 m x 2.40 for reasons of ease of transport, but nothing prevents the modification of these dimensions.
L'épaisseur (c'est-à-dire la hauteur) de l'armature peut être variable pour tenir compte des données de plateforme et de trafic, mais les épaisseurs les plus courantes se situent entre 1 et 5 cm, de préférence entre 2,5 et 4 cm.The thickness (i.e. the height) of the reinforcement can be variable to take account of platform and traffic data, but the most common thicknesses are between 1 and 5 cm, preferably between 2 , 5 and 4 cm.
La paroi du matériau formant l'armature peut être percée de trous bordés afin de donner de la rigidité et des possibilités d'accrochage de l'enrobé par frottement, mais toute autre réalisation permettant d'améliorer le frottement peut être utilisée.The wall of the material forming the reinforcement can be pierced with bordered holes in order to give rigidity and possibilities of attachment of the mix by friction, but any other embodiment making it possible to improve friction can be used.
La structure alvéolaire peut être notamment en nids d'abeille (motif hexagonal), mais d'autres motifs géométriques (rectangles, carrés, losanges, ronds, etc) sont utilisables.The honeycomb structure can be in particular honeycomb (hexagonal pattern), but other geometric patterns (rectangles, squares, diamonds, circles, etc.) can be used.
La dimension des alvéoles varie en général de 5 à 25 cm, de préférence de 12 à 20 cm, ce qui permet le support d'un essieu de 13 t., mais il n'est pas exclus pour des utilisations particulières (aéroport; piste à chars, voies ferrées, etc) d'augmenter ou de diminuer cette dimension.The size of the cells generally varies from 5 to 25 cm, preferably from 12 to 20 cm, which allows the support of an axle of 13 t., But it is not excluded for specific uses (airport; runway tanks, railways, etc.) to increase or decrease this dimension.
Mise en oeuvre de l'armatureArmature implementation
Les éléments d'armature arrivant par semi-remorque sur le chantier peuvent être déchargés par petites grues et mis en place par les mêmes moyens de manutention.The reinforcing elements arriving by semi-trailer on the site can be unloaded by small cranes and set up by the same handling means.
L'assemblage des éléments peut être réalisé de plusieurs façons (boulonnage, agraphage, soudage, boutonnage etc...), ce travail pouvant être manuel sur des petits chantiers ou parfaitement automatisé. Dans certains cas il sera possible d'exécuter un agrafage par cavaliers fichés dans la couche support. Il n'est prévu de joints ni de construction, ni de dilatation. La structure ainsi réalisée est déformable dans toutes les dimensions et peut de ce fait absorber d'elle-même les contraintes s'y exerçant. L'équipe de mise en oeuvre doit par contre respecter, au niveau du tracé, le plan de calepinage étudié.The assembly of the elements can be carried out in several ways (bolting, stapling, welding, buttoning etc ...), this work can be manual on small sites or perfectly automated. In some cases it will be possible to carry out a stapling by jumpers stuck in the support layer. No joints, construction or expansion are planned. The structure thus produced is deformable in all dimensions and can therefore absorb the stresses exerted thereon by itself. On the other hand, the implementation team must respect, at the level of the layout, the layout plan studied.
Mise en oeuvre des matériaux de remplissage (enrobés ou autres matériaux routiers traditionnels de structure).Use of filling materials (asphalt or other traditional road structural materials).
Ceux-ci s'appliquent avec les moyens traditionnels (finisseur; grader; à la main) sur l'armature ainsi constituée et doivent remplir la totalité des alvéoles de celle-ci. De plus ils doivent être en surépaisseur d'au moins 1 cm pour permettre le compac-tage et la protection complète de l'armature vis-à-vis des agressions climatiques et de la circulation. Une surépaisseur compactée de 1 à 2 cm est convenable, mais celle-ci peut être bien plus conséquente.These apply with traditional means (finisher; grader; by hand) on the reinforcement thus formed and must fill all of the cells thereof. In addition they must be in extra thickness of at least 1 cm to allow compaction and complete protection of the frame against climatic damage and traffic. A compacted extra thickness of 1 to 2 cm is suitable, but it can be much more substantial.
La structure métallique pourra être protégée ou revêtue en surface, en usine ou sur chantier, contre tout agent corrosif, ou afin d'améliorer la liaison avec les matériaux de remplissage.The metal structure may be protected or coated on the surface, in the factory or on site, against any corrosive agent, or in order to improve the bond with the filling materials.
L'armature selon l'invention peut être mise en oeuvre dans n'importe laquelle des couches traditionnelles de la chaussée, c'est-à-dire dans la couche de fondation, la couche de base ou la couche de roulement ou plusieurs couches, selon le trafic et selon l'état de la couche de forme. En cas de réfection de chaussée, généralement il suffira de mettre en oeuvre l'armature dans la couche de roulement.The reinforcement according to the invention can be used in any of the traditional layers of the road, that is to say in the foundation layer, the base layer or the wearing course or several layers, according to traffic and according to the state of the form layer. In the event of a roadway repair, it will generally suffice to install the reinforcement in the wearing course.
En pratique, l'armature sera mise en place sur la couche précédente, revêtue d'une mince couche d'accrochage (moins de 1mm), puis incluse dans le matériau de remplissage qui est finalement compacté.In practice, the reinforcement will be placed on the previous layer, coated with a thin bonding layer (less than 1mm), then included in the filling material which is finally compacted.
Les exemples suivants illustrent l'invention.The following examples illustrate the invention.
On réalise la réfection d'une chaussée en tout venant surmontée d'une couche d'enrobés fortement dégradée, à la sortie d'un entrepôt industriel (nombreux poids lourds à vitesse réduite).A roadway is being repaired, all of which is surmounted by a layer of highly degraded asphalt, at the exit of an industrial warehouse (many heavy goods vehicles at reduced speed).
Deux essais ont été effectués :
- a) On pose une armature épaisse de 2,5 cm ayant une structure en nids d'abeille, en feuillard d'acier 12/10e mm, la largeur des alvéoles étant de 15 cm, sous forme d'éléments de 12m × 2,40m. Après mise en oeuvre d'une couche d'accrochage (émulsion de bitume), on noie l'armature dans un tapis d'enrobés traditionnel (béton bitumineux 0/10 mm) sur 4 cm d'épaisseur, au moyen d'un finisseur.
- b) On opère comme dans a) ci-dessus, sauf que l'on utilise comme armature une structure en nids d'abeille, en feuillard d'acier 15/10e mm, ayant une épaisseur de 4 cm et des alvéoles de 18 cm de large, et que l'on réalise un tapis d'enrobés de 6 cm.
- a) A 2.5 cm thick frame is placed, having a honeycomb structure, of steel strip 12 / 10th mm, the width of the cells being 15 cm, in the form of elements of 12m × 2, 40m. After use of a bonding layer (bitumen emulsion), the reinforcement is drowned in a traditional asphalt mat (0/10 mm bituminous concrete) 4 cm thick, using a finisher.
- b) The procedure is as in a) above, except that a honeycomb structure, of steel strip 15/10 mm, having a thickness of 4 cm and cells of 18 cm, is used as a reinforcement. wide, and make a 6 cm asphalt mat.
Dans les deux cas, après un nombre répété de passages d'essieux de poids lourds, ces structures de chaussées n'on montré aucun défaut.In both cases, after a repeated number of axle passes by heavy goods vehicles, these pavement structures showed no defects.
Sur une couche de fondation en graves non traitées 0/31,5 mm du type GRH (graves reconstituées humidifiées), on pose une armature de même structure que dans l'exemple 1b) ci-dessus. On met en oeuvre une couche d'imprégnation (émulsion de bitume), puis au finisseur un enrobé traditionnel graves bitume 0/20 sur une épaisseur de 10 cm noyant l'armature. Sur cette couche de base on réalise une couche de roulement de 4 cm en Compolfex R (de SCREG Routes et Travaux Publics).On a 0 / 31.5 mm non-treated gravel foundation layer of the GRH type (reconstituted humidified gravel), a reinforcement of the same structure is applied as in Example 1b) above. An impregnation layer (bitumen emulsion) is used, then a traditional asphalt 0/20 bituminous asphalt over a thickness of 10 cm embedding the reinforcement at the finisher. On this base layer, a 4 cm wearing course is made of Compolfex R (from SCREG Roads and Public Works).
La chaussée ainsi réalisée a montré une grande résistance au passage des poids lourds.The pavement thus produced showed great resistance to the passage of heavy goods vehicles.
Claims (10)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8816265A FR2640297B1 (en) | 1988-12-09 | 1988-12-09 | METHOD FOR CONSTRUCTING AN ARMED PAVEMENT USING A METAL STRUCTURE |
| FR8816265 | 1988-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0373041A1 true EP0373041A1 (en) | 1990-06-13 |
Family
ID=9372794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89403316A Withdrawn EP0373041A1 (en) | 1988-12-09 | 1989-11-29 | Process for constructing a reinforced road using a prefabricated metallic structure |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0373041A1 (en) |
| FR (1) | FR2640297B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0505010A1 (en) * | 1991-03-22 | 1992-09-23 | N.V. Bekaert S.A. | A method for reinforcing a covering layer on ground |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2748760B1 (en) * | 1996-05-20 | 1998-11-13 | Screg | REINFORCED ROAD LAYER, ALVEOLAR STRUCTURE AND ELEMENT BASED ON PLASTIC MATERIAL FOR SUCH A ROAD LAYER |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB367256A (en) * | 1931-05-19 | 1932-02-18 | Eugenio Miozzi | Improvements in or relating to paving |
| FR921473A (en) * | 1945-11-16 | 1947-05-08 | Waterproof coating for roofs, floors, roads and all parking areas as well as for reservoirs, basins, dikes, etc. | |
| DE2360277A1 (en) * | 1973-12-04 | 1975-06-12 | Ludwig Ufer | Roadway surface layer sections' abutting ends joint member - with combed configuration pointing away from joint and ending in wedge shape |
| GB2162559A (en) * | 1984-07-30 | 1986-02-05 | Japan Constec Kk | A bridge expansion joint arrangement and method of applying a continous surface layer thereover |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1097845B (en) * | 1957-05-02 | 1961-01-19 | Bitulac Ltd | Flooring |
-
1988
- 1988-12-09 FR FR8816265A patent/FR2640297B1/en not_active Expired - Lifetime
-
1989
- 1989-11-29 EP EP89403316A patent/EP0373041A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB367256A (en) * | 1931-05-19 | 1932-02-18 | Eugenio Miozzi | Improvements in or relating to paving |
| FR921473A (en) * | 1945-11-16 | 1947-05-08 | Waterproof coating for roofs, floors, roads and all parking areas as well as for reservoirs, basins, dikes, etc. | |
| DE2360277A1 (en) * | 1973-12-04 | 1975-06-12 | Ludwig Ufer | Roadway surface layer sections' abutting ends joint member - with combed configuration pointing away from joint and ending in wedge shape |
| GB2162559A (en) * | 1984-07-30 | 1986-02-05 | Japan Constec Kk | A bridge expansion joint arrangement and method of applying a continous surface layer thereover |
Non-Patent Citations (1)
| Title |
|---|
| BITUMEN, vol. 37, no. 2, 1975, pages 49-50; L. BESTMANN: "Fahrbahnbeläge auf den Fähren "Bubendey" und "Wendemuth" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0505010A1 (en) * | 1991-03-22 | 1992-09-23 | N.V. Bekaert S.A. | A method for reinforcing a covering layer on ground |
| BE1004705A3 (en) * | 1991-03-22 | 1993-01-12 | Bekaert Sa Nv | Method for reinforcing a top layer of LAND. |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2640297A1 (en) | 1990-06-15 |
| FR2640297B1 (en) | 1991-10-11 |
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