Removable traffic surface system made of precast concrete slabs with detachable connections

Abstract

The present disclosure relates to a demountable traffic surface system (100) comprising a first and a second precast concrete slab (110, 130), each equipped with corresponding connecting devices. Each connecting device has a projection located on its upper and lower sides, respectively, allowing them to overlap. Multiple precast concrete slabs (110, 130) can be joined together to form the traffic surface system (100) by means of a plurality of connecting elements, which are guided through through-holes in the projection of the first precast concrete slab (110) and detachably fastened in openings in the projection of the second precast concrete slab (130).At least in the upper projection, a first reinforcement is provided, comprising at least one internal flange which includes at least one through-hole that coincides with one of the plurality of through-holes of the upper projection. The traffic surface system (100) can be dismantled by releasing the connecting elements.

Description

[0001] The present disclosure relates to a demountable traffic area system made of coupled precast concrete slabs. In particular, the present disclosure relates to a demountable traffic area system, wherein precast concrete slabs have corresponding projections for load transfer, which can be placed one above the other and releasably fastened to one another with connecting means that are guided through through holes or openings in the projections. A reinforcement with at least one flange is located in at least one of the projections, wherein at least one through hole is provided in the flange, which coincides with one of the through holes.

[0002] Roadways and sidewalks are typically cast as a continuous strip of asphalt or concrete. Temporary roadways, such as construction site access roads, driveways for heavy machinery (trucks, excavators, cranes, etc.), and similar temporary traffic areas, are also laid with asphalt or concrete on a previously prepared subsurface.

[0003] However, the dismantling of such (temporary) roadways or sidewalks is done through demolition. Ultimately, the poured material (asphalt or concrete) must be disposed of, even if it was only in use for a few days, weeks, or months.

[0004] Therefore, it is the object of the present disclosure to provide an improved traffic surface.

[0005] This object is achieved by the present invention as defined in the independent claim. Preferred embodiments are defined in the dependent claims.

[0006] According to a first aspect for a better understanding of the present disclosure, a demountable traffic surface system comprises a first precast concrete slab with oppositely arranged connecting devices, and at least one second precast concrete slab with oppositely arranged connecting devices. The use of precast concrete slabs enables the traffic surface system to be manufactured prior to actual use and / or during the preparation of the subgrade of the (temporary) traffic surface to be created.

[0007] Each connecting device of the first precast concrete slab has a top projection extending along a respective side edge of the first precast concrete slab and in which a plurality of through holes are provided. A top projection is a projection that protrudes on one side of the first precast concrete slab and faces the top side of the precast concrete slab. Preferably, the top side of the precast concrete slab also forms part of the projection. In other words, the first precast concrete slab has a cut or recess along two opposite sides below the top side of the precast concrete slab (for example, on the underside), thereby forming the projection above.

[0008] Each connecting device of the second precast concrete slab has a bottom projection extending along a respective side edge of the second precast concrete slab and in which a plurality of openings are provided. A bottom projection is a projection that protrudes on one side of the second precast concrete slab and faces the underside of the precast concrete slab. Preferably, the underside of the precast concrete slab also forms part of the projection. In other words, the second precast concrete slab has a cut or recess along two opposite sides above the underside of the precast concrete slab (for example, at the top), thereby forming the projection thereunder.

[0009] With regard to both the first and the at least one second precast concrete slab, "with oppositely arranged connecting devices" does not only mean connecting devices on parallel side edges of the respective precast concrete slab. Depending on the basic shape of the precast concrete slab, the connecting devices can also be provided on adjacent (i.e., intersecting or touching) side edges. In other words, "diagonally arranged connecting devices" are also included.

[0010] In the traffic area system, the first precast concrete slab is arranged next to the second precast concrete slab such that the upper projection overlaps the lower projection. In other words, the upper projection of the first precast concrete slab lies in the recess of the second precast concrete slab (above the lower projection).

[0011] The traffic area system further comprises a plurality of connecting means, each of which is inserted through one of the plurality of through holes and releasably fastened in one of the plurality of openings. The connecting means thus serve to releasably connect the first precast concrete slab to the second precast concrete slab in order to form or dismantle the traffic area system. Furthermore, the connecting means can be configured to fasten the upper projection of the first precast concrete slab to the lower projection of the second precast concrete slab. This creates a continuous slab. Depending on the number of first and second precast concrete slabs, this can be used to create a traffic route or other traffic area.

[0012] The through holes and the openings preferably extend in a direction substantially perpendicular to the top and bottom of the first precast concrete slab. In particular, the through holes can begin on an upper side of the first precast concrete slab, allowing the connecting means to be inserted from above.

[0013] Thanks to the removable fasteners, the two precast concrete slabs can be separated and reused. This eliminates the need for demolition and subsequent disposal of asphalt or concrete. Damaged precast concrete slabs can also be easily removed, making replacement easier in the event of damage and significantly simplifying access to sections or other components located beneath the traffic area system.

[0014] The traffic surface system further comprises a first reinforcement, a portion (or section) of which is located in the upper projection. The reinforcement serves to transfer loads from the connection area (projection) to the rest of the slab and vice versa. The portion or section of reinforcement can, for example, be conventional reinforcing steel.

[0015] The first reinforcement further comprises at least one flange having at least one through-hole coinciding with one of the plurality of through-holes in the upper projection. In other words, the at least one inner flange (or inner flange) of the first reinforcement is arranged such that the through-holes in the projection and in the at least one flange lie one above the other in pairs and thus together form a through-hole through the projection. This allows loads to be better introduced into the precast concrete slab via the connecting means or transferred to the connecting means, so that loads can be effectively transferred from one precast concrete slab to the next precast concrete slab attached to it. Further load introduction and load distribution occur through the part or section of the reinforcement that is arranged in the projection and / or extends into the interior of the precast concrete slab.

[0016] By way of example only, the two precast concrete slabs can have corresponding projections and recesses, i.e., corresponding side profiles, that interlock or lie on top of one another. In particular, the height of a projection on one slab corresponds to the height of the recess on the other slab. For example, the upper projection of the first precast concrete slab can have a height that essentially corresponds to the height of the lower projection of the second precast concrete slab. This allows the two projections to be constructed identically, i.e., they can absorb and transfer the same loads, creating a chain of precast concrete slabs with continuous load transfer.

[0017] In one implementation variant, the traffic area system can further comprise a bedding on which the first precast concrete slab and the at least one second precast concrete slab are supported. The bedding can be arranged over the entire surface beneath the first and second precast concrete slabs to provide the most uniform support possible for the precast concrete slabs. Of course, the bedding can also cover a larger area than the interconnected slabs. For example, edge strips can be created alongside the traffic area using the bedding.

[0018] For example only, the bedding can comprise a gravel bedding and / or a cast bedding and / or an existing traffic route. The bedding primarily serves to create a (full-surface) support for the traffic surface system, i.e., for the first and second precast concrete slabs. The bedding can, in particular, create a horizontal support surface, although the traffic surface system can, of course, also be arranged on a slope or embankment.

[0019] In a further implementation variant, the traffic area system may further comprise a leveling layer arranged in an area where the overlapping connecting devices of the first and second precast concrete slabs lie. This leveling layer primarily serves to create a solid base in the area where the first and second precast concrete slabs are connected to each other.

[0020] In one implementation variant, the traffic area system can further comprise a slab forming a front face of the upper projection. The reinforcement serves, on the one hand, to transfer loads from the connection area (projection) to the remaining slab and vice versa. On the other hand, the slab forming the front face enables edge protection of the first precast concrete slab, particularly at the upper projection. For example, the slab forming the front face can be exposed to the outside. The slab protects the precast concrete slab from spalling or similar damage (for example, during transport, installation into the traffic area system, or even during operation) and can be made of structural steel or profile steel, for example.

[0021] In one implementation variant, the plate forming the front face can be connected to the at least one flange of the first reinforcement. The connection can be made, for example, by welding. Thus, the at least one flange can be attached to an inner side (i.e., the side facing the concrete) of the plate.

[0022] In one implementation variant, the plate forming the end face can be connected to the first reinforcement. The connection can be made, for example, by welding. Thus, the plate forming the end face can be attached to an inner side of the plate. For example, the part or section of the reinforcement can be attached to the plate, for example, welded, and extend into the interior of the first precast concrete plate. The part or section of the reinforcement can be, for example, conventional reinforcing steel.

[0023] In one implementation variant, the plate forming the end face can be part of a profile. A profile serves to distinguish it from a (two-dimensional) plate arranged on the end face of the projection, wherein the profile preferably has a section that points away from the plate.

[0024] Furthermore, the flange can be integrated into the plate, for example by cold or hot forming and producing a corresponding profile.

[0025] In one implementation variant, the plate forming the front of the projection can also be L-shaped or U-shaped, with the plate forming one leg of the L-shaped profile or the base of the U-shaped profile with two adjoining legs. This allows for better edge protection for the projection, since not only the front but at least one adjoining (top or bottom) side of the projection is protected by the first reinforcement. This variant applies to both the first and second reinforcement.

[0026] In one implementation variant, the profile forming the slab can be a T-profile. In other words, the profile has several sections, one of which is located at the front of the projection, and the other of which extends into the concrete slab. This allows loads from the projection or side edge to be easily transferred into the concrete slab.

[0027] In the case of a slab provided by a profile, a flange may additionally be provided in the precast concrete slab. It is possible for the at least one flange to be free from the slab or profile (for example, attached to reinforcing bars), or for the at least one flange to be attached to the slab or profile. The present disclosure is not limited to any particular combination.

[0028] In one implementation variant, the part (or section) of the first reinforcement may comprise a plurality of reinforcing bars. For example only, the reinforcing bars may be arranged substantially perpendicular to the side edge of the first precast concrete slab forming the projection.

[0029] In one implementation variant, the at least one flange can span at least two of the reinforcing bars. In other words, the at least one flange overlaps at least two of the reinforcing bars in a top view.

[0030] For example only, a flange can span exactly two adjacent (and directly adjacent) reinforcing bars. Furthermore, several such flanges can be provided, whereby the gap between two reinforcing bars remains free, i.e., not overlapped / spanned by a flange. For example, a first gap between two reinforcing bars can be overlapped / spanned by a flange, the next gap can be free, the next gap can be overlapped / spanned by a flange again, the next gap can be free, and so on.

[0031] Also, by way of example only, a flange can span more than two adjacent rebars, up to a single flange spanning all rebars. With more than one flange, two or more spaces can be overlapped / spanned by a flange, followed by one or more free spaces, and so on.

[0032] In one implementation variant, the at least one flange can be arranged between two adjacent reinforcing bars. The flange thus does not overlap / span both reinforcing bars or none at all. For example only, such a flange can be attached to the slab forming the front face in such a way that it is arranged between two reinforcing bars (without leaving them open).

[0033] In one implementation variant, the traffic area system may further comprise a second reinforcement having a part (or section) arranged in the underside projection.

[0034] Alternatively or additionally, the second reinforcement may also comprise a plate forming a front side of the underside projection.

[0035] Also alternatively or additionally, the second reinforcement may comprise at least one flange comprising at least one through hole coinciding with one of the plurality of openings of the underside projection of the second precast concrete slab.

[0036] The details, properties, geometries, functions and advantages mentioned above for the first reinforcement, end plate and flange apply equally to the second reinforcement or the plate forming the end face or the flange(s) provided there and are not reproduced here to avoid repetition.

[0037] In a further implementation variant, the portion of the first reinforcement can extend from the upper projection into the interior of the first precast concrete slab, preferably having a lateral offset. For example, the portion of the first reinforcement (viewed in a thickness direction of the precast concrete slab; i.e., a vertical direction when the precast concrete slab is installed horizontally) can be arranged centrally in the projection and extend in a straight line into the interior of the first precast concrete slab. The reinforcement can, for example, be aligned parallel to the upper surface of the precast concrete slab.

[0038] Alternatively, an offset can be provided so that after the portion of the first reinforcement in the top projection, the reinforcement runs, for example, toward the center (again viewed in the thickness direction of the slab). There, the first reinforcement can again be aligned parallel to the top of the precast concrete slab.

[0039] In yet another implementation variant, the plurality of fasteners can each be a screw or threaded bolt. The screw or threaded bolt can be configured to be fully received in the through-hole, so that no portion of the screw or threaded bolt protrudes above the top surface of the precast concrete slab. If the screw or threaded bolt has a head, the through-hole can correspond to a stepped bore, i.e., have a widened portion on the top side so that the head can be accommodated in the widened portion.

[0040] Furthermore, each of the numerous openings can have a thread into which the screw or threaded bolt can be screwed. This allows for a simple screw connection and thus a detachable connection between the two precast concrete slabs. The traffic area system can thus be easily installed and dismantled.

[0041] The thread in each opening can be implemented, for example, in the form of a sleeve with an internal thread, a nut, or a similar threaded component. For example only, the sleeve, nut, threaded component, etc., can be attached to the second reinforcement, for example, by welding or using a screw clamp. Also for example only, the sleeve, nut, threaded component, etc., can be attached (for example, welded) to the plate forming the end face of the second reinforcement.

[0042] In another implementation variant, the traffic surface system may further comprise at least one elastic insert located in a joint between the overlapping connecting devices of the first and second precast concrete slabs. The insert may be an elastic support. For example only, an elastic plastic, rubber, etc., may be used to form the insert.

[0043] Such an insert serves, on the one hand, to reduce vibration transmission between the two precast concrete slabs. On the other hand, it further protects the edges of the respective projections or notches along the sides of the two precast concrete slabs, as the two precast concrete slabs do not lie directly on top of each other and cannot rub against each other.

[0044] The present disclosure is not limited to the aspects and variants in the form and order described herein. Rather, the description of the aspects and variants should not be understood as a specific limitation and / or grouping of features, but rather should also encompass combinations of aspects and variants. Thus, each variant and / or optional feature may be further combined with another aspect, variant, optional feature, or even combinations thereof.

[0045] In the following, the present disclosure will be described with reference to exemplary implementation variants illustrated in the drawings, wherein: Fig. 1 schematically shows a perspective view, top view, side view and a detailed section of a first precast concrete slab; Fig. 2 schematically shows a perspective view and a detailed section of a second precast concrete slab; Fig. 3 schematically shows a traffic area system during assembly; Fig. 4 shows schematically a detailed section of two connected precast concrete slabs; Fig. Figure 5 schematically shows a perspective view and two side views of a first reinforcement; Fig. 6 schematically shows a perspective view of a second reinforcement; Fig. 7 to 11 schematically show a perspective view and two side views of various exemplary reinforcements.

[0046] In the following description, certain details and features are described for illustrative purposes only, but not for limiting the present disclosure, in order to provide an understanding of the present disclosure. In some drawings, certain features that appear in multiples are not individually identified by a reference numeral to maintain legibility of the figure.

[0047] Fig. 1 schematically shows a perspective view, a top view, a side view and a detailed section of a first precast concrete slab 110 of a demountable traffic area system 100 ( Fig. 3). The first precast concrete slab 110 has opposing connecting devices 112. These are provided on two opposite sides of the precast concrete slab 110. The two sides of the precast concrete slab 110 with the connecting devices 112 lie on an axis of the traffic area system, along which vehicles can later travel.

[0048] Each connecting device 112 has a top projection 113 disposed above a recess 114. As illustrated, the top projection 113 is either considered an extension of the top surface of the first precast concrete slab 110 or is formed by the formation of the recess 114 (i.e., a recess on the bottom side).

[0049] A plurality of through holes 115 are provided in the projection 113, which extend from the top side of the first precast concrete slab 110 through the entire projection 113 into the recess 114.

[0050] To improve the stability of the first precast concrete slab 110, and in particular of the projection 113, a first reinforcement 120 is provided. The first reinforcement 120 has a part or section 123 arranged in the upper projection 113. For example, this part or section 123 of the first reinforcement 120 can be located centrally between the upper side of the first precast concrete slab 110 and the underside of the projection 113.

[0051] A plate 121 of the reinforcement 120 can be provided on the front side of the upper projection 113. Even if Fig. 1, the plate 121 is shown spaced apart from the end face of the projection 113, this merely serves to illustrate that such a plate 121 is present. In particular, the plate 121 can be exposed on the outside and form the entire end face of the projection 113 on the outside.

[0052] Fig. 5 shows a perspective view and both side views of an exemplary first reinforcement 120. The reinforcement 120 may, in particular, include the portion or section 123 extending from the inside of the plate 121. For example, the portion or section 123 of the reinforcement 120 may consist of a plurality of reinforcing bars beginning at the plate 121. A connection between the plate 121 and the reinforcing bars 123 may be made by welding.

[0053] The Fig. 5 The side of the plate 121 visible in the perspective view also forms the front side of the projection 113 when the first reinforcement 120 is installed in the first precast concrete slab 110. In a further embodiment, which is shown in the Fig. 10 and Fig. 11, the plate 121 can also have a top and / or bottom leg or flange. In other words, the plate 121 can also be part of an L-shaped or U-shaped profile. These legs or flanges can also be arranged on the outside (on the top side of the precast concrete slab 110 or the projection 113 or on the underside of the projection 113) and thus form the visible outer side of the projection 113. This further improves the edge protection for the projection 113.

[0054] The reinforcement bars 123 can be offset, meaning they can be S- or Z-shaped. This offset can, for example, occur at a point where the projection 113 or the recess 114 ends (as viewed toward the center of the first precast concrete slab 110). Due to the offset, the reinforcement bars 123 can also be arranged in sections in the middle of the first precast concrete slab 110 (as viewed in the thickness direction, see Fig. 1 Detailed section from top to bottom). This allows for good load introduction and transfer from the first precast concrete slab 110 to the projection 113 and vice versa.

[0055] The first reinforcement 120 further comprises at least one flange 122 ( Fig. 5 shows a total of four flanges 122 as an example. For example only, the flanges 122 can be arranged between two reinforcing bars 123 (viewed in a top view of the reinforcement 120). Each flange 122 can be attached to the plate 121 (for example, by welding) or form an integral component with the plate 121 (for example, by cold or hot forming a profile component). A through hole 124 is provided in the flange(s) 122 that coincide(s) with one of the plurality of through holes 115 of the first precast concrete slab 110. For example, both through holes 115, 124 can have a common axis and / or the same diameter. The number of flanges 122 can be equal to the number of through holes 115. Alternatively, fewer flanges 122 than through holes 115 may be provided, for example only half as many flanges 122 as through holes 115.

[0056] Fig. 2 schematically shows a perspective view and a detailed section of a second precast concrete slab 130. The second precast concrete slab 130 has oppositely arranged connecting devices 132. Each of the connecting devices 132 has a lower projection 133 that extends along a respective side edge of the second precast concrete slab 130. In other words, the underside of the second precast concrete slab 130 is continuous with the underside of the projection 133. On the upper side of the second precast concrete slab 130, a cutout or recess 134 is provided along the side edge, forming the projection 133.

[0057] Corresponding to the first precast concrete slab 110, each connecting device 132 of the second precast concrete slab 130 has a plurality of openings 135 in the underside projection 133. The arrangement and spacing between two openings 135 can correspond to the arrangement and spacing between two through-holes 115 of the first precast concrete slab 110. Alternatively, a different number of through-holes 115 and openings 135 can be present, although the two precast concrete slabs 110, 130 can be arranged such that a plurality of openings 135 overlap with one through-hole 115.

[0058] In any case, the first and second precast concrete slabs 110, 130 can be arranged next to one another such that the upper projection 113 overlaps with the lower projection 133 and each of the plurality of through holes 115 can be arranged over an opening 135 or, conversely, each opening 135 is accessible through a through hole 115 from the upper side of the first precast concrete slab 110. In Fig. 3 this is schematically illustrated by a common axis S on each side of the first precast concrete slab 110.

[0059] A second reinforcement 140 is provided in / on the second precast concrete slab 130. The second reinforcement 140 has a part or section 143 arranged in the underside projection 133. Of course, the part or section 143 can also extend into an area of ​​the second precast concrete slab 130 in which no notch or recess 134 is present. Optionally, the part or section 143 of the second reinforcement 140 can also have an offset, as shown and explained for the first reinforcement 120.

[0060] Fig. Figure 6 schematically shows a perspective view of a second reinforcement 140. The second reinforcement 140 may also have a plate 141 that forms an end face of the underside projection 133. The part or section 143 of the second reinforcement 140 may be formed from a plurality of reinforcing bars that are attached to the plate 141 (for example, welded thereto). The plate 141 may also form the visible outer side (end face) of the underside projection 133, even if in Fig. 2 the end face of the projection 133 and the plate 141 of the reinforcement 140 are shown spaced apart from each other.

[0061] As explained for the first reinforcement 120, the plate 141 of the second reinforcement 140 can also be L-shaped or U-shaped to provide better edge protection for the projection 133. To avoid repetition, reference is made to the corresponding explanations for the first reinforcement 120.

[0062] Fig. Figure 3 schematically shows a traffic surface system 100 during assembly. A bedding 170, for example, a gravel bedding and / or a poured bedding (concrete, asphalt, or similar) and / or an existing roadway, can be provided to prepare the subsurface for the traffic surface system 100.

[0063] One or more second precast concrete slabs 130 can be laid on the bedding 170. The underside projection 133 of these slabs 130 thus rests on the bedding 170, while the notch 134 points upwards. At least one second precast concrete slab 130 (in Fig. 3 (two such slabs 130 are shown), a first precast concrete slab 110 is laid, wherein the upper projection 113 of the first precast concrete slab 110 overlaps the lower projection 133 of the second precast concrete slab 130. In particular, the through holes 115 and openings 135 of the two projections 113, 133 have an axis S that coincides with one another.

[0064] After the first precast concrete slab 110 has been inserted, connecting means 150 can be provided on the axes S, each of which is guided through one of the through holes 115 and inserted into one of the openings 135 arranged below. This allows the first precast concrete slab 110 to be releasably fastened to at least one second precast concrete slab 130.

[0065] To better prepare the overlap area between the two precast concrete slabs 110, 130, a leveling layer 172 can be arranged in this overlap area. The leveling layer 172 can be, for example, a thin strip of asphalt or concrete (a blinding layer). However, if the bedding 170 is installed sufficiently evenly (and if the bedding 170 is sufficiently stable), the leveling layer 172 can be omitted.

[0066] By joining and connecting the two precast concrete slabs 110, 130, a traffic area system 100 of any size can be created. In particular, a roadway can be constructed in the form of a long chain of precast concrete slabs 110, 130.

[0067] Of course, the connecting devices 112, 132 of the first and second precast concrete slabs 110, 130 can also be provided on only one side or more than two sides of the respective precast concrete slab 110, 130. This allows an end section of the traffic area system 100 to be formed (with only one connecting device 112, 132), or a further precast concrete slab 110, 130 can be arranged on any side of each precast concrete slab 110, 130 (with multiple connecting devices 112, 132), with the first and second precast concrete slabs 110, 130 alternating. Traffic area systems 100 of any size can also be formed in any direction.

[0068] Furthermore, the connecting devices 112, 132 of the first and second precast concrete slabs 110, 130 can be provided in reverse at least on some sides of the precast concrete slabs 110, 130. In other words, a connecting device 132 with a lower projection 133 can also be provided on one of the side edges of the first precast concrete slab 110, and correspondingly, a connecting device 112 with an upper projection 113 can be provided on one of the side edges of the second precast concrete slab 130. This makes it easier to place the first and second precast concrete slabs 110, 130 next to each other in at least two directions and to connect them to each other.

[0069] Fig. 4 schematically shows a detailed section of two connected precast concrete slabs 110, 130. On the common axis S of the through hole 115 and the opening 135, a connecting means 150 can be inserted into the through hole 115 and continued into the opening 135. As the Fig. 4, the connecting means 150 is also guided through the through hole 124 of the flange 122.

[0070] The opening 135 may contain a thread, for example, in the form of a sleeve with an internal thread, a nut, or a similar threaded device. Accordingly, the connecting means 150 may be a screw or a threaded bolt or a similar device with an external thread. This allows the first precast concrete slab 110 to be screwed to the second precast concrete slab 130.

[0071] In order to better protect the projections 113, 133 of the two precast concrete slabs 110, 130 from chipping and similar damage during use in the traffic area system 100 and to reduce the transmission of vibrations between the two precast concrete slabs 110, 130, at least one elastic insert can be placed between the two precast concrete slabs 110, 130. Fig. 4 shows, merely by way of example, a horizontal elastic insert 162 which is arranged between the bearing surfaces of the two projections 113, 133.

[0072] Furthermore, an elastic insert 160 can be inserted into the upper joint between the projection 113 of the first precast concrete slab 110 and the recess 134 of the second precast concrete slab 130. Alternatively, it can also be an expansion joint or similar elastic material to prevent or at least reduce the penetration of water, dirt, and the like into the joint between the two precast concrete slabs 110, 130. For the same reason, a head of the connecting element 150, for example, a screw head, can also be protected. For this purpose, the section of the through-opening 115 in which the head of the connecting element 150 is arranged can be closed, for example, with an elastic casting compound or a plug.

[0073] Each of the precast concrete slabs 110, 130 can be dimensioned such that it can be lifted by a simple crane, for example a mobile crane, or an excavator or similar heavy vehicle and inserted into the traffic area system 100. For example only, the precast concrete slabs 110, 130 can have a length L ( Fig. 1 and Fig. 2) between 2.50 m and 3.75 m, preferably between 2.80 m and 3.30 m, and particularly preferably approximately 3.10 m. This allows a single lane to be formed. Also merely by way of example, the precast concrete slabs 110, 130 can have a width B ( Fig. 1 and Fig. 2) between 2.50 m and 3.75 m, preferably between 2.60 m and 3.10 m, and particularly preferably approximately 2.89 m. This allows the precast concrete slabs 110, 130 to be transported on suitable trucks. The thickness or strength (in the vertical direction) of each precast concrete slab 110, 130 can be between 10 cm and 30 cm, preferably between 12 cm and 20 cm, and particularly preferably approximately 14 cm. This allows a slab weight of approximately 300 to 400 kg / m for the above-mentioned lengths and widths L, B. 2 , preferably of approx. 350 kg / m 2 This allows the precast concrete slabs 110 and 130 to be easily transported, lifted, and installed into the traffic area system 100.

[0074] The length of the projections 113, 133 can be between 8 cm and 30 cm, preferably between 8 cm and 20 cm, and particularly preferably approximately 10 cm. The thickness of the projections 113, 133 can, for example, be half the thickness of the precast concrete slab 110, 130.

[0075] The Fig. 1 and Fig. 2 show precast concrete slabs 110, 130 with a square or rectangular basic shape. Of course, other shaped slabs can also be used. For example only, triangular, pentagonal, hexagonal, octagonal, or other polygonal precast concrete slabs (not separately shown) can be used, each with one or more connecting devices, and are covered by the present disclosure.

[0076] In any case, with regard to the first and the at least one second precast concrete slab 110, 130, "with oppositely arranged" connecting devices 112, 132 is not only to be understood as connecting devices 112, 132 on mutually parallel side edges of the respective precast concrete slab 110, 130. Depending on the basic shape of the precast concrete slab 110, 130, the connecting devices 112, 132 can also be provided on adjacent (i.e., intersecting or touching) side edges. In other words, "obliquely oppositely arranged connecting devices" 112, 132 are also encompassed in the present disclosure.

[0077] In the variant described above, the Fig. 5 an exemplary first reinforcement 120, and the Fig. 6 shows an exemplary second reinforcement 140. The present disclosure is not limited to the specific embodiments of the first and second reinforcement 120, 140 shown in the figures. Rather, the second reinforcement 140 may also have the same structure as the first reinforcement 120. In other words, Fig. 5 also a possible second reinforcement.

[0078] In the Fig. 7 to 11 show further exemplary reinforcements which can be used both as first reinforcement 120 and second reinforcement 140, although they are provided with the reference numerals of the first reinforcement 120.

[0079] In Fig. For example, Figure 7 shows reinforcement 120 consisting solely of reinforcing bars and flanges 122. Each flange 122 spans at least two of the reinforcing bars, in particular exactly two reinforcing bars. Thus, two reinforcing bars and one flange 122 always form a component that can be installed in the precast concrete slab 110, 130. A through-opening 124 is provided in each flange 122, which coincides with one of the plurality of through-holes 115 of the respective projection 113, 133.

[0080] Merely as an example, the distance between the reinforcing bars can be selected such that a flange is always arranged at a through opening 135, 115 of the projections 113, 133 when every second space is designed without a flange.

[0081] In this variant, the force transmission between the two precast concrete slabs 110, 130 takes place via the connecting elements 150, the flanges 122 and the reinforcing bars.

[0082] In Fig. Figure 8 shows a variant in which a single flange 122 spans a plurality of reinforcement bars (here, all reinforcement bars of reinforcement 120, 140). This variant allows for easier installation compared to the multi-part variant of Fig. 7. The distribution of the introduced / transmitted forces across the entire width of the precast concrete slab 110, 130 is also better.

[0083] Fig. 9 shows a variant that is derived from Fig. 8. This variant includes a plate 121 forming the end face of the projection 113, 133. This plate 121 can, for example, be welded to the flange 122 ( Fig. Figure 9 shows corresponding weld seams 121a). Alternatively, the plate 121 can also be part of a profile steel, for example, a T-shaped profile. The top of the T-shape is formed by the plate 121, while the flange 122 forms the base. This can be produced, for example, by cold forming or hot forming.

[0084] Of course, a combination of the variants from the Fig. 7 and Fig. 9. In other words, the plate 121 may be attached to a plurality of flanges 122, which in turn are attached to reinforcing bars.

[0085] Fig. 10 shows a variant that has two modifications compared to the variant of the Fig. 9. Firstly, the front plate 121 is formed by an L-shaped profile. This provides good edge protection for the precast concrete slab 110, 130.

[0086] Secondly, a plurality of flanges 122 are attached to the inside of the plate 121 (e.g., by welding). Each flange 122 is arranged so that it lies between two directly adjacent reinforcing bars.

[0087] The Fig. The variant shown in Figure 10 is therefore quite similar to the one in Fig. 5, wherein the plate 121 comprises an L-shaped profile.

[0088] Of course, a single continuous flange 122, as in Fig. 8. The reinforcement bars can be attached to the flange 122 and / or to the plate 121, thereby achieving greater rigidity and load transfer.

[0089] Fig. 11 shows another variant, similar to the variant from Fig. 10. In Fig. 11, the plate 121 is formed from a U-shaped profile, so that edge protection of the projection 113, 133 is provided upwards and downwards.

[0090] Other variants are possible, such as one of the variants from the Fig. 7 and Fig. 8 with a face plate 121, without requiring a connection between the reinforcement bars and the flange 122 on one side and the face plate 121 on the other side. The face plate 121 can be a simple plate, an L-shaped profile, or a U-shaped profile.

[0091] The length of the flange 122 and the number of flanges 122 can also vary. Thus, one flange 122 can span two or more reinforcing bars, with several such flanges being provided in a precast concrete slab.

[0092] Furthermore, the fastening of the reinforcing bars can also vary in that they are attached (e.g., welded) to the flange(s) 122 and / or to the end plate 121. Likewise, the flange(s) 122 can be attached (e.g., welded or formed integrally therewith) to the end plate 121 or can be arranged freely from the end plate 121 in the precast concrete slab 110, 130.

Claims

[1] Removable traffic area system (100), comprising: a first precast concrete slab (110) with oppositely arranged connecting devices (112), wherein each connecting device (112) of the first precast concrete slab (110) has a top projection (113) extending along a respective side edge of the first precast concrete slab (110) and in which a plurality of through holes (115) are provided; and at least one second precast concrete slab (130) with oppositely arranged connecting devices (132), wherein each connecting device (132) of the second precast concrete slab (130) has a lower projection (133) which extends along a respective side edge of the second precast concrete slab (130) and in which a plurality of openings (135) are provided, wherein the first precast concrete slab (110) is arranged next to the second precast concrete slab (130) such that the upper projection (113) overlaps the lower projection (133), and wherein the traffic area system (100) further comprises: a plurality of connecting means (150), each inserted through one of the plurality of through-holes (115) and releasably secured in one of the plurality of openings (135); and a first reinforcement (120) with a part (123) arranged in the upper projection (113) of the first precast concrete slab (110), wherein the first reinforcement (120) comprises at least one internal flange (122) comprising at least one through-hole (124) coinciding with one of the plurality of through-holes (115) of the top projection (113). [2] Traffic area system (100) according to claim 1, further comprising: a plate (121) forming an end face of the upper projection (113). [3] Traffic area system (100) according to claim 2, wherein the plate (121) forming the front side is connected to the at least one flange (122) of the first reinforcement (120). [4] Traffic area system (100) according to claim 2 or 3, wherein the plate (121) forming the front side is connected to the first reinforcement (120). [5] Traffic area system (100) according to one of claims 2 to 4, wherein the plate (121) forming the end face is part of a profile, preferably part of an L-, T- or U-profile. [6] Traffic area system (100) according to one of claims 1 to 5, wherein the part (123) of the first reinforcement (120) comprises a plurality of reinforcing bars, and wherein the at least one flange (122) spans at least two of the reinforcing bars, or wherein the at least one flange (122) is arranged between two adjacent reinforcing bars. [7] Traffic area system (100) according to one of claims 1 to 6, further comprising: a second reinforcement (140) with a part (143) arranged in the underside projection (133), and / or a plate (141) forming an end face of the lower projection (133). [8] Traffic area system (100) according to one of claims 1 to 7, wherein the part (123) of the first reinforcement (120) extends from the top projection (113) into the interior of the first precast concrete slab (110), and preferably has a lateral offset. [9] Traffic area system (100) according to one of claims 1 to 8, wherein the plurality of connecting means (150) is each a screw or threaded bolt, and wherein each of the plurality of openings (135) has a thread into which the screw or threaded bolt can be screwed. [10] Traffic area system (100) according to one of claims 1 to 9, further comprising: at least one elastic insert (160, 162) located in a joint between the overlapping connecting devices (112, 132) of the first and second precast concrete slabs (110, 130).

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