LU84096A1 - ELEMENT FOR THE CONSTRUCTION OF WITHDRAWAL OR EXPANSION JOINTS AND COMPOSITE ELEMENT OBTAINED WITH THIS ELEMENT - Google Patents

Description

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- î; - '' uu jjicocm; c iiivcm.1 yu υuuuciHt U 'U11Ö pdlL UfciS eieiIieilCS POUf the construction of shrinkage or expansion joints and on the other hand composite elements obtained by means of said elements, especially elements for the production of shrinkage or expansion joints without differential settlement for any civil engineering work, such as roads, airways, circulation, parking or storage areas, cold stores, floating slabs or screeds, sluices, tunnels, buildings and the like.

A first object of the invention is that the seat of the element is made of a material, such as steel or other material, thus avoiding, with respect to known elements in concrete, ea pouring and drying of these elements.

Another object of the invention is that the elements are constructed in such a way that their presence does not create any appreciable deformation of the slab in which they are incorporated, which allows not to saw the crack initiators of the joints as quickly than the known distribution elements require.

Another object is that the elements according to the invention can be incorporated into the thickness of slabs or screeds clearly thinner than those which can be produced with known concrete elements.

Another object of the invention is that the distribution elements can be used in: s coatings traditionally thinner than concrete coatings such as, for example, hydrocarbon or other coatings.

Another object is to make it possible to incorporate the elements for the construction of shrinkage or expansion joints, in the thickness of the coating, even in the event of very strong

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charges of use whereas the known distribution elements must, in this case, be placed in trenches <t '\ * »- •' * · - *: '. iSV' ·. * 'V. · ôwuu-juuuawcô and xa uûiic ·; "'.......

Another object is to greatly reduce the weight of the elements compared with known concrete elements and, therefore, to considerably reduce the cost of transport and implementation of these elements according to the invention.

Another object of the invention is that the fixing of the waiting bars can be carried out by welding, given that both the seat and these waiting bars are made of steel. In a particular version, the seat and the waiting bars can be made in one piece by casting.

Another object of the invention consists in connecting together, by a rigid connection, at least two aforementioned load transfer elements, so as to avoid the relative displacement of these light insulated elements.

Another object of the invention is that these composite elements, being heavier than the isolated elements, have better stability during their use.

Another object of the invention is that these composite elements considerably facilitate handling and the speed of installation with respect to the isolated elements.

Another object of the invention is that the load transfer elements of the composite element are arranged in such a way that they increase the length of the zone where the sawing is to be carried out; we thus obtain the certainty of a correct sawing.

Another object of the invention consists in connecting composite elements to each other by means of a device allowing easy attachment and alignment of these elements.

Another object of the invention is that the devices parallel to the axis of the joints also serve as supports for the reinforcements of the slab.

W44 UMV.J.W vj-'juw '-t'— j_ xuvciiuiuii L / UxIîdXîd L.G cl ULJ.XJ.b & i. UëS tilö “* load transfer elements and their connecting devices parallel to the axis of the joints of a height such that the assembly is always under the reinforcement ply of the slab and thus allows the use of all the above types of reinforcement regardless of the size of their meshes.

The insulated elements according to the invention are essentially constituted by a thin quadrangular base in a weldable and / or flowable material having a high tensile strength.

The composite elements according to the invention essentially consist of at least two isolated elements, half of the upper surface of which has anchoring elements or waiting bars, these plates being placed and mutually secured one behind the other, the waiting bars being staggered.

In order to better highlight the characteristics of the invention, preferred embodiments are described below, by way of example without limitation, with reference to the accompanying drawings, in which: Figure 1 shows a view perspective an isolated element according to the invention; FIG. 2 represents, in plan and schematic view, a rolling area at the location of a withdrawal or expansion joint executed according to the invention; Figure 3 is a section along line III-III of Figure 2; Figures 4 and 5 show, in side view, two variants of the element according to Figure 1; FIG. 6 shows in side view an element according to the invention in a mixed steel-concrete execution; Figure 7 shows in perspective view a corn- - £ / w »M'.uww u. XUVUXiUXtyiXf l Figure 8 shows, in plan view and schematically, a rolling area at the location of a shrinkage or expansion joint, executed with composite elements according to the invention; FIG. 9 represents a section on an enlarged scale, along the line IX-IX of FIG. 8; and FIG. 10 is an enlargement of the part indicated at F10 in FIG. 8.

In Figure 1 is illustrated an element 1 according to the invention, this element being constituted by a seat 2 of quadrangular shape and hooking means, or waiting bars 3 in the form of stirrups. These waiting bars are located on the upper face of the seat 2 and this in such a way that they are present only on half of the upper surface of the seat.

In a known manner, these elements are in alignment below the slab 4 with, preferably, interposition between the elements 1, of a compressible material, not shown in the drawings, the stirrups 3 being staggered - see FIG. 2 - so that the elements 1 are alternately secured to one and the other of the slabs 4 after the slab is provided with a groove 5 forming a primer for a crack 6.

It goes without saying that the elements 1 can be made of any material, but preferably these elements 1 will be made of steel.

In a first embodiment, the stirrups 3 are fixed on. the seat 2 by welding.

In another embodiment, the elements can be obtained in one piece, by casting.

In both cases, the elements will preferably be executed either in a non-corrodible steel, or in a steel treated with i ·· --- -. - ------ ww—-. wwww -. ww ^ -w WWAXW k / uxi.XiJUlimiUia. U J. U. LSJL U ”" 'sion.

In Figures 4 and 5 are also shown, by way of example, elements 1 whose shape of the stirrups 3 is different.

Finally, in Figure 6 is shown an application in which the element 1 is secured to a base 7, for example of concrete, this attachment being obtained by anchoring means 8.

In FIG. 7 is illustrated a composite element 9 according to the invention. This composite element is constituted by several isolated charge transfer elements 1, as described above.

In the example of FIG. 7, four elements 1 are placed one behind the other in order to form an alignment, the stirrups 3 being staggered and the elements 1 being mutually secured to the upper part of their bars. standby 3 by a connecting element constituted by longitudinal members, respectively 10 and 11, and cross members, in this case 12-13 and 14. The cross members 12 and 14 will preferably be fixed at a certain distance from the end longitudinal members 10 and 11 so as to form guide rods, respectively 15-16-17 and 18.

These composite elements will be brought into alignment below the slab 4, composite elements 9 preferably being fixed to one another by means of sleeves 19 in which the co-axial guide rods are engaged 15-16-17 and 18 neighboring composite elements.

The resistance of the crosspieces 12-13-14 must be such that the latter can deform or break during the movements of withdrawal and expansion of the slab, without disturbing the functioning of the joint.

It goes without saying that the connecting element 10 to 14 can be made of any suitable material. However, these elements will

Claims (17)

1. Insulated element for the construction of withdrawal or expansion joints, of the type formed by a base, half of the upper surface of which is provided with anchoring elements or waiting bars, characterized in that it consists by a thin quadrangular seat in a weldable and / or flowable material having a high tensile strength. 2. Insulated element according to claim 1, characterized in that the said seat is made of steel, the waiting bars being welded on its upper face. 3. Insulated element according to claim 1, characterized in that the said seat as well as the waiting bars are made of steel and obtained in one piece by casting. 4. insulated element according to any one of claims 1 to 3, characterized in that the thickness of the seat is between 0.01 to 0.5 times the thickness of the slab in which the above element is incorporated . 5. Isolated element according to any one of claims 1 to 4, characterized in that the waiting bars have the shape of a stirrup. 5.- insulated element according to any one of the preceding claims, characterized in that it is made of a non-corrodible steel. 7.- Isolated element according to any one of claims - -y .. -Λ; . ·· *: ·· ”, '*' -Λ .., - * Λ„, - „- * w. *., *. *. v -w. * ww .1. J_ WWW wo.uu.ww U V W W> U.JU "w ^ UXU U U J.’ C ........ * anti-corrosion. 8. Insulated element according to any one of the preceding claims, characterized in that it is treated with an abrasion-resistant paint. 9. insulated element according to any one of the preceding claims, characterized in that the seat is provided, on its lower surface, with a concrete base. 10. Composite element obtained with insulated elements according to any one of the preceding claims, characterized in that it consists of at least two insulated elements placed and mutually secured one behind the other, the waiting bars being arranged in staggered rows. 11. A composite element according to claim 10, characterized in that the connecting element of the isolated elements arranged one behind the other is formed by moiris one spar per row of waiting bars. 12. Composite element according to claim 11, characterized in that the side members are fixed on the upper part of the waiting bars. 13. Composite element according to claim 12, characterized in that the side members are fixed to the waiting bars by welding. 14. Composite element according to any one of claims 10 to 13, characterized in that the side members are connected to each other by at least one cross member. 15. Composite element according to any one of claims 10 to 14, characterized in that each composite element is formed by four isolated elements. 16. Composite element according to any one of the claims 10 to 15, characterized in that the neighboring composite elements are connected to each other by means of sleeves cooperating with blind jLcb exuLBuauea co-dxiai.es ae spars . 17, - Composite element according to any one of claims 10 to 16, characterized in that the resistance of the crosspieces,. respectively the resistance of the fastening nodes of these crosspieces, are such that the crosspiece or the aforesaid knot can deform or break during the movements of withdrawal and expansion of the slab, without disturbing the operation of the joint.