FI84284C - Road construction - Google Patents

Description

1 84284

The present invention relates to a road structure whose pavement is formed of elements arranged overlapping two layers so that the transverse ridges of the roads at the edges 5 of the elements are in grooves in the central parts of the opposing elements, and the part between the ridges at the edges penevan uran.

10 It is known that when constructing roads, for example on a tundra, a sand mattress has been used as the road base and loose concrete blocks or slabs as pavement. The disadvantage of the method is that it requires large masses of sand and yet there is a risk that the sand mattress 15 may suddenly break, causing the vehicle and paving blocks at the point of break to sink into the tundra of the tundra in an instant. The repair of the broken road is done by driving new sand masses and paving blocks to the damage site.

Various road element boards which can be superimposed on two 20 layers are also known. The disadvantage of these is that they require a hard and level surface. If the plates had to move relative to each other on a soft surface, they would break.

DE-A-2 501 947 and 2 636 983 disclose a road structure in which the mating elements have a plurality of mating grooves and ridges. The structure is rigid and cannot adapt to the shapes of the soft substrate, which may break the elements.

DE-A-3 403 740 discloses a path element with a U-profile 30 which is intended to be installed in one layer. The U-profile flanges are intended to run longitudinally. The structure cannot withstand the weight of the vehicle on an uneven or submersible surface.

DE-A-2 345 568 describes building elements in which the surfaces to be fitted against each other are either fracture surfaces or curved surfaces.

DE-A-1 409 791 describes a road structure 2 84284 in which the elements are arranged in an overlapping two layers. Between the ridges at the edges of the elements there is a groove in which the ridges of the two opposite elements are fitted. However, the groove is so wide compared to the ridges 5 that the ridges do not fill it.

The elements of the upper layer may break under the weight of the heavy vehicle when its center is not supported in any way.

The road structure according to the present invention is characterized in that the outer surface of the two successive ridges of two successively arranged elements together corresponds to the shape of the groove of the opposing element so that the two ridges together fill the groove. The road structure according to the invention can withstand the weight of the vehicle 15 without breaking even on an uneven or submersible surface, e.g.

swamp. The elements are allowed to pivot about a transverse axis under the weight of the load and adapt to a soft surface. When two successive ridges together fill the groove of the opposite element, the weight of the vehicle 20 is also uniformly applied to the lower element layer while the upper layer is supported over its entire lower surface. The same element is used in both the base and surface layers, so only one type of elements is needed for a straight road section.

The invention and its details will be described in more detail below with reference to the accompanying drawings, in which Figure 1 shows a side view of an element according to the invention, Figure 2 shows several elements 30 stacked as a coating, Figure 3 shows the corners of two successive elements and Figure 4 shows a side view of a coating .

35 The longitudinal cross section of the path of the element 10 is similar over the entire width of the element. Thus, the elements can be made by sliding casting from a concrete mass. The element 3,84284 has a planar outer surface 1 along its length, which in the finished coating in the lower layer comes down against the road base and in the upper layer upwards as the upper surface of the road. The transverse end surfaces 2 of the road element 5 are perpendicular to the outer surface 1.

The inside of the element, which in the finished coating is fitted against the inside of the second element layer, consists in the application shown in the drawings of a fracture surface formed by several levels. At the ends joining the end surface-10 of the element there are transverse ridges 3 with a transverse recess 4 between them. That is, the angle between the bottom plane of the recess 4 and the sloping surface 5 is greater than 90 °, for example 135 °. The longitudinal width of the path of the recess 4 is twice the width of the outer surface of the ridge 3 in the same direction.

The inner side of the element design is therefore such that the finished coating 20 of two successive ridges element 3 fit to the inner surface element into the recess 4, preferably entirely fill the cavity. The cross section is preferably symmetrical with respect to its vertical centerline.

Figure 2 shows a coating formed of elements. The elements are stacked on top of each other in two layers. The road can be built, for example, in the following way.

A uniform plastic "Geoteks" -30 road mat is applied as the road base, which equalizes the created pressures and prevents sudden breakage.

The "Geoteks" worms are sanded with a smaller size than in the previously used method, i.e. the total mass and weight are smaller.

A reinforced concrete coating consisting of the elements according to the invention is applied to the sand bed, which, due to its design, forms a uniform unbroken surface layer. In the coating, the pressure caused by a single axle of the vehicle spreads over the area of several elements.

In order to reduce the tensile stress received by the element due to the road load and the compressive stress between the elements, the elements can also be connected to each other by simple steel ties 6 or a uniform steel rope. Due to the structure of the pavement, the road surface can also be easily dismantled if desired, without breaking parts.

Figure 3 shows reinforcing loops 7 cast on the side surfaces of the elements, through which the steel ties 6 can be threaded. The same loops can also be used when lifting elements.

Figure 4 shows a road surface with 15 height differences. As can be seen from the figure, the opposing elements are allowed to move relative to each other with small gaps between them.

The invention is not limited to the above application, but may vary in various ways within the scope of claims 20.

formed by three, four, five fracture surface layers can be replaced by a curved surface, e.g., so that the inside of the element cross section is in the shape of a sine curve. A combination of planar surfaces and curved surfaces can also be used.

The surfaces of the element can be provided with a suitable roughening, in which case the surface can be e.g. grooved. Thus, the terms "planar surface" or "curved surface" should be understood more broadly, respectively.

If necessary, the elements can be lightened by forming a cavity in them, which preferably runs in the longitudinal direction of the element, i.e. in the transverse direction of the road.

The ends 2 can be not only perpendicular to the plane 1, but also inclined. Most preferably, however, the ends 2 of the two successive elements 35 fit together.

The continuous steel band 6 can also be replaced by a separate loop connecting two successive elements.

5,84284

Elements with one side parallel to the road longer than the other side can be used to cover the curves of the road, in which case the elements can also be triangular when viewed from above. Such elements are not made by sliding-5 but by casting into a mold.

Above, the width of the element means the transverse dimension of the road and the length of the element means the dimension parallel to the road.

Claims (8)

1. A road structure whose coating consists of elements 5 (10) which are interlaced in two layers with an overlap joint in such a way that the transverse crown (3) of the road, which is at the edges of the elements, is in the recesses (4) in the middle parts and the part of the opposing elements, formed between the tops of the crown (3) at the edges of the elements (10), in its entirety forms a sphere (4) which tapers to its bottom, characterized in that the outer surface of two consecutive elements (10), two consecutive crowns (3) together correspond to the shape of the danger (4) of the element which rests against them in such a way that these two crowns together fill the danger. A road structure according to claim 1, characterized in that the top of the crown (3) of the element (10) and the bottom of its sphere (4) are formed by the ply which is aligned with the opposite surface (1) of the element. A road structure according to claim 1, characterized in that the surfaces forming the top of the crest (3) and the bottom of the flange (4) are joined to flat surfaces (5) which form a blunt angle (a) with the flange (4). bottom surface. A road structure according to claim 1, characterized in that said blunt angle (a) is about 135®. 5. A road structure according to claim 1 or 2, characterized in that the crown (3) and the hazards (4) are formed by curved surfaces or by a combination of flat surfaces and curved surfaces. A road structure according to any of claims 1-5, characterized in that the elements (10) are joined together with joining means (6). 8 84284 A road structure according to claim 6, characterized in that the joining means (6) join the elements (10) with each other in two separate layers. 5 A road structure according to claim 7, characterized in that the joining means (6) join together the two element layers.