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.

Applications Claiming Priority (2)

Publications (1)

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Citations (4)

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• 1988
  • 1988-12-09 FR FR8816265A patent/FR2640297B1/fr not_active Expired - Lifetime
• 1989
  • 1989-11-29 EP EP89403316A patent/EP0373041A1/de not_active Withdrawn

Patent Citations (4)

Non-Patent Citations (1)

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