SK9125Y1 - Reinforcement net for landscaping and road works and method of its production - Google Patents

Abstract

The reinforcement net is provided to reinforce the top layer or pavement, the top layer of which is made of bitumen, asphalt or the like. The reinforcing net (1) is a steel net braided with longitudinal wires (3, 4) and equipped with reinforcing elements (6) extending in the transverse direction of the steel net. The reinforcing elements (6) are provided with at least one curved part (7) along their length. The curved part (7) has a shape which deviates from the straight direction of the rest of the transverse reinforcing element (6).

Description

Technical field

The present technical solution relates to a reinforcement net for reinforcing an upper base layer or pavement, the top layer of which is made of bitumen, asphalt or the like.

In more detail, the solution relates to a reinforcing mesh, which is a double-twisted steel mesh braided with longitudinal wires and equipped with reinforcing elements extending in the transverse direction of the steel mesh.

Prior art

A reinforcement net for reinforcing the upper base layer or the roadway is known. An example is the reinforcement net sold under the trademark "Road Mesh" by Officine Maccaferri S.p.A. "Road Mesh" is a braided double-twisted steel net with a hexagonal eye, with transverse reinforcing bars woven into the net. It can be placed in the upper bound layers of the pavement cover to reinforce the asphalt layers, while providing lateral retention of the asphalt, absorbing and ultimately reducing the maximum tensile stresses caused by the presence of cracks and / or road traffic.

Another example of a reinforcing mesh is described in WO 98/35100, where the transverse reinforcing elements consist of helically-twisted steel profiled wires of rectangular cross-section. These transverse reinforcement elements have improved resistance to tearing. However, the production of a net which includes these spiral steel profiled bars is expensive and quite complicated.

The essence of the technical solution

The aim of the technical solution is to provide a reinforcement net of said type for a base layer or roadway, which has transverse reinforcement elements which have good tear resistance, while being simple and economical from the point of view of production. Another object of the solution is to provide a reinforcing mesh which is durable and adapted to absorb high tensile stresses in earth or road works. Another object of the invention is to provide an improved method of manufacturing a reinforcing mesh of said type which has economical transverse reinforcing elements which can be easily incorporated into a steel mesh and are highly tear resistant.

Said objects are achieved by a reinforcing net having the features set out in the appended claims.

The formation of cracks and ruts on asphalt roads can be prevented by a reinforcing mesh according to the present invention, which can reinforce the asphalt layer of the road by absorbing tensile stresses while the asphalt transmits compressive stresses. Transverse reinforcement elements can provide better load distribution. The reinforcement net has a three-dimensional structure, thanks to which the material of the bonded layer envelops each continuous strand of wire, which ensures the interaction of the layers, and thus the optimal and immediate transfer of the load from the aggregate to the reinforcement. Transverse reinforcement elements located in the transverse direction of the reinforcement net can absorb tensile stresses caused, for example, by heavy traffic and prevent lateral displacement of the asphalt road, thus preventing the formation of cracks in the longitudinal direction of the road.

According to one aspect, a reinforcing mesh is described for reinforcing a top base layer or pavement, the top layer of which is made of bitumen, asphalt or the like. The reinforcing net may be a net woven with longitudinal wires. The reinforcing mesh is equipped with reinforcing elements extending in the transverse direction of the steel mesh. The reinforcing elements can be provided with at least one curved part along their length. The curved portion may have a shape that deviates from the straight direction of the rest of the transverse element. The curved portion can be easily obtained from an otherwise straight transverse element such as a rod. In contrast to the solution described in WO 98/35100, a prefabricated transverse element is not required and a conventional rod can be used instead. The bending on the transverse element can be suitably achieved by a machine or tool which acts on the transverse element when it is connected to the steel mesh during its production.

According to another aspect, the reinforcing elements have a circular cross-section, as they can be in the form of bars or rods, with the possibility of a standardized type available in the shop.

According to another aspect, at least one curved part of the transverse element is arranged close to the edge side of the steel mesh. This ensures correct and improved tear resistance.

In yet another aspect, the at least one curved portion has an omega shape or a trapezoidal shape. This type of shape is easily achieved with a simple machine or tool and by quick handling, while at the same time ensuring that the transverse element can have an increased resistance to tearing.

According to another aspect, at least one curved portion is contained in the boundary region of one mesh of the steel mesh. This makes it easier to grip the straight transverse element after it has been inserted into the steel mesh and to bend it in order to increase its tear resistance.

SK 9125 Υ1

In another aspect, the steel mesh is a double twist steel mesh. The production technology of this type of steel net is well established and the technical properties of the steel net are well known. The transverse elements can advantageously be inserted into the bends of the steel mesh in a simple and quick manner.

According to yet another aspect, each end of the reinforcing element may have two curved portions in close proximity to each other and generally close to the respective edge side of the steel mesh. In this way, the bending of the transverse element is reduced to only two pairs of curved parts near the edges of the steel mesh, in order to speed up the production of the reinforcing mesh without compromising the strength and resistance to tearing. Preferably, but not exclusively, the two curved portions on each reinforcing element are separated from each other by one eye of the reinforcing mesh in order to achieve an increased tear resistance. Preferably, the curved portion closest to the edge portion of the steel mesh is spaced from one to three whole or half and a half meshes of the reinforcing mesh so as to further increase the tear resistance.

According to another aspect, a method of manufacturing a reinforcing mesh of said type is described. The method includes the step of interweaving the longitudinal wires and providing reinforcing members extending in the transverse direction of the steel mesh. This method comprises the further step of bending each of the reinforcing elements in at least one curved part along its length, in a shape which deviates from the straight direction of the rest of the transverse element.

Overview of figures in the drawings

Other features and advantages will be apparent from the following detailed description of a preferred embodiment with reference to the accompanying drawing, given by way of non-limiting example only, in which FIG. 1 shows a top view of a reinforcement net according to the technical solution.

Examples of embodiments

Referring to FIG. 1 comprises a reinforcing net according to the present solution a braided steel net 1 with hexagonal meshes 2. The hexagonal meshes 2 are formed by interweaving two longitudinal wires 3 and 4. The edge sides 8 of the steel net 1 are terminated in several places by a wire hem 5, although not necessary. The reinforcing elements 6 are fixed in bends or a steel net 1, transverse to the steel net 1, preferably at regular intervals. The reinforcing elements 6 are made of straight steel bars which are bent so as to form one or more curved parts 7 along their length. The reinforcing elements 6 preferably have a circular cross-section. The curved portions 7 preferably have an omega shape or a trapezoidal shape, or more generally a shape that deviates from the straight direction of the rest of the rod. Preferably, each curved part 7 is completely contained in the space of one hexagonal eye of the steel net. More preferably, the curved portions 7 are located within the meshes which are close to the edge side of the steel net 1, i.e. close to the edge 8 or to the rim 5 when used. In the example shown, each transverse reinforcing element 6 has two curved parts 7 near the edge 8 terminated by a flange 5. The curved parts 7 are separated from each other by one eye of the steel net 1. The curved part 7 closest to the edge 8 is separated from the last part one and a half meshes, but could be separated by edge 8 by any other number of whole or half and meshes, for example 1 mesh, 2 meshes, 2.5 meshes, 3 meshes, 3,5 meshes, etc. Also, the distance between the curved portion 7 and the adjacent portion may be greater or less than one eye. For example, the curved portions 7 may be made within adjacent meshes or may be separated from each other by any number of meshes, for example 1, 2, 3 meshes, etc.

The longitudinal wires 3 and 4, the hem 5 and the reinforcing elements 6 are preferably made of steel wire, preferably they are galvanized. For example, the longitudinal wires 3 and 4 may have a nominal diameter of 2.4 mm, while the edge wire may have a nominal diameter of 3.0 mm. The transverse bars of the elements 6 preferably have a diameter of 4.4 mm. The meshes are preferably of the mesh type 80 x 100 mm. The reinforcing elements 6 are spaced, for example, at a distance of two meshes long, but can be spaced apart by one or one and a half meshes, or in any other suitable number of whole or whole and half meshes. The reinforcement elements may not be evenly spaced, but may be unevenly spaced from each other, depending on the specific needs and design of the reinforcement mesh.

In the production of the reinforcing net 1, a series of longitudinal wires 3, 4 are arranged on the knitting machine so that they can be intertwined in a known manner. The straight transverse reinforcing bars 6 are inserted at intervals, preferably at regular intervals, so that they are fitted in the curves of the steel mesh in a known manner. After inserting the straight bars into the steel net 1, they are locally bent to form curved parts 7. The production of the steel net 1 is fast, simple and economical.

It is to be understood that without prejudice to the principle of the technical solution, the design and implementation details may differ significantly from those described and illustrated as long as the scope of the present technical solution is maintained.

Claims (10)

CLAIMS FOR PROTECTION Reinforcement net for landscaping and road works to reinforce the top base layer or roadway, the top layer of which is made of bitumen, asphalt or the like, characterized in that the reinforcement net (1) is a steel net braided with longitudinal wires (3, 4 ) and provided with reinforcing elements (6) extending in the transverse direction of the steel mesh, wherein the reinforcing elements (6) are provided along their length with at least one curved part (7), the curved part (7) having a shape which deviates from the straight direction the rest of the transverse reinforcement element (6). Reinforcement net according to claim 1, wherein the reinforcement elements (6) have a circular cross section. Reinforcement mesh according to claims 1 or 2, wherein the at least one curved part (7) is arranged close to the edge side (5) of the steel mesh (1). Reinforcement net according to any one of the preceding claims, wherein the at least one curved part (7) has an omega shape or a trapezoidal shape. Reinforcement net according to any one of the preceding claims, wherein at least one curved part (7) is included in the boundary region of one eye (2) of the steel net (1). Reinforcement mesh according to any one of the preceding claims, wherein the steel mesh (1) is a double-stranded steel mesh. Reinforcing mesh according to any one of the preceding claims, wherein each reinforcing element (6) has two curved parts (7) in close proximity to each other and generally close to the edge (5) of the edge portion of the steel mesh (D- Reinforcing mesh according to claim 7, wherein the two curved parts (7) on each reinforcing element (6) are separated from each other by one or two meshes (2) of the steel mesh (1). Reinforcing mesh according to claims 7 or 8, wherein the curved part (7) closest to the edge (5) of the steel mesh (1) is spaced from one to three whole or half and half meshes (2) of the reinforcing steel mesh (1). A method of manufacturing a reinforcing mesh according to any one of claims 1 to 9, comprising the steps of knitting longitudinal wires (3, 4) and providing reinforcing elements (6) extending in the transverse direction of the steel mesh (1), further bending each reinforcing member (6). along its length in at least one curved part (7) which has a shape which deviates from the straight direction of the rest of the transverse reinforcing element (6).