DK3227495T3

DK3227495T3 - Road crossing with finger plates

Info

Publication number: DK3227495T3
Application number: DK15825782.4T
Authority: DK
Inventors: Martin Albrecht; Karl-Heinz Aigner
Original assignee: Xtend Patentverwertungs Og
Priority date: 2014-12-04
Filing date: 2015-11-30
Publication date: 2018-12-17
Also published as: HUE040557T2; PL3227495T3; EP3227495A1; WO2016086247A1; ES2699883T3; EP3227495B1

Description

Description [0001] The invention relates to a road joint and here in particular the fastening arrangement of the finger plate in a cage, as well as to its simple maintenance. A roadway is equipped with appropriate road joints at the transition, for example, between bridges or tunnels for the different expansion of the roadway.

These joints are known in various embodiment variants and are partly carried out with finger plates for better bridging of the expansion gap.

In the embodiment of such a joint in accordance with the invention, the fastening arrangement is designed for easy interchangeability, so that the fastening arrangement can be easily and simply replaced during maintenance. In addition, simple height adjustment is possible, so that it can be easily adapted to the joint at different road heights.

With the road joint according to claim 1 and the following, dependent claims, a simple and quick possibility for change without milling, drilling or welding work and simple height compensation is possible, which results in a considerably shorter road closure and lower costs in the case of maintenance.

[0002] When constructing roadways, some bridges or tunnels are necessary due to the terrain, the roadways of which expand and contract differently from the rest of the roadway. To compensate these expansion paths of different components and to avoid stresses, road joints are known in various embodiments. One embodiment to which this invention refers is a road joint with finger plates that interlock with each other and thus enable expansion joints to be crossed as comfortably as possible. Since the fingers protrude beyond the cage into the expansion joint, the finger plate must be screwed tightly to the cage. Known road joints with bolted finger plates are described in EP 1 359 254 A2 and EP 1 033 442 A2. In known joints, the finger plate is fastened from above with a screw into a nut welded in the cage. This embodiment is particularly disadvantageous for two reasons:

Firstly, according to the standard, the nut of a fastening fitting must be tightened for HV fittings and not the screw, which is not possible in this case.

[0003] Secondly, during maintenance work, for example on a partially broken finger plate, the entire fastening fitting must be replaced, since according to the standard a high-strength, pretensioned screw connection may only be tightened once with torque and both the screw and the nut, i.e. the entire fastening fitting, must be replaced when loosened.

[0004] Since the nut is welded into the cage in known cases, it must be drilled out and then a new nut must be welded in again. On the one hand, this is labor-intensive and therefore time- and cost-intensive.

[0005] On the other hand, in addition to the high costs, the duration of the road closure is considerable, which often takes several days and is subject to suitable weather conditions by the necessary welding process.

[0006] Thirdly, the thickness of the finger plate and cage also defines the connection height to the roadway and can only be adjusted with finger plates of corresponding thickness. This results in high costs.

[0007] Fourthly, the direct contact of the finger plate with the cage creates an undefined contact surface, which can lead to crevice corrosion if the seal is inadequate.

[0008] Fifthly, for reasons of cost, the cage and finger plate should be as low as possible in height as a result of the height of the roadway. This leads to the use of relatively short screws, which is also disadvantageous with HV screw connections, as these can loosen relatively quickly in the event of settlement and the resulting loss of tension, which must be avoided at all costs.

[0009] In order to avoid these disadvantages, a fastening arrangement should be found where the nut can be tightened on the screw and the fastening fitting can be replaced easily and without costly tools or processing equipment, in particular drilling, milling or welding machines, and without damage to the KO protection. Therefore, the aim of the invention is a fastening arrangement which is designed in accordance with the standards (application of the torque via the nut) as well as an easily exchangeable fastening fitting (screw, nut and washer). Furthermore, a defined force should be applied between finger plate and cage and simple height compensation should be possible.

[00010] This object is achieved by a road joint according to claim 1 of the invention and the following dependent claims.

[0001 1] The invention is described in more detail by reference to Figs. 1 to 4, which show a possible embodiment of the fastening arrangement.

[00012] Fig. 1 shows the top view of such a road joint.

[00013] Fig. 2 shows an exemplary embodiment in sectional view. In this case, the finger plate is intersected in the middle of the contact surface to the cage, so that one fastening fitting is visible, the other not.

[00014] Fig. 3 shows an exemplary embodiment with a shear pin in sectional view. The finger plate is intersected in the middle of the contact surface to the cage, so that one fastening fitting is visible, the other not.

[00015] Fig. 4 shows another sectional view with a corresponding shear pin.

[00016] In the case of a finger joint, finger plates (20) serve to make traveling over the necessary expansion joint as homogeneous as possible and to avoid impacts both on the passing vehicle and on the joint itself as far as possible. For the geometric design of the fingers different embodiments are known, which are not discussed here. The invention is suitable for all types and designs of finger plates (20).

In the case of road joints with a finger plate (20), said plate must be bolted to a cage (30).

[00017] In addition, an expansion joint profile for drainage (not shown) and fixing brackets (40) for reinforcing irons (41) are attached to the cage (30) for better and safer fixing in the concrete. An angle profile (50) is also required as a stop for the later road surface covering (60).

[00018] A finger plate (20) has several fingers and is also screwed several times. Typically, the finger plates (20) are screwed together twice in a row and several times next to each other. Fig. 1 shows a part of such a finger plate (20), which is screwed together twice in a row and in the figure three times next to each other with a fastening fitting (10).

[00019] The invention deals with the type of connection, wherein, for example, an illustrated connection between finger plate (20) and cage (30) is described by two fastening fittings (10) one behind the other and correspondingly often next to each other in width (transverse direction of the road joint) depending on dimensioning and static requirements. This invention obviously also applies analogously to only one fastening fitting (10), or even three or more thereof, per transverse position of the finger plate (20) with a cage (30). For better legibility, the following description deals with the arrangement shown in Fig. 1 with two fastening fittings (10) per transverse position and no longer mentions different numbers.

[00020] The interplay of cage geometry (30), a shear pin (25) possibly located between them and the embodiment of the finger plate (20) and the fastening fitting (10) is described as the fastening arrangement. The fastening fitting (10) consists of a bolt, a nut and two washers, as they are present for a HV connection with bolt strength 10.9 as prescribed in this case. The bolts and nuts are designed as hexagon bolts or nuts.

[00021] The fastening arrangement is formed such that the tightening torque can be applied via the nut.

[00022] For this purpose, a through hole for the screw is provided in the finger plate (20) at the corresponding position and a larger diameter receptacle for the washer or nut and the corresponding wrench is provided at the upper position.

In the cage (30) there is a groove in the cross-section to accommodate the screws and the washer facing the screw head. This groove consists of at least 3 different widths.

In the upper region (facing the finger plate (20)), the groove has the width of the screw shank and a corresponding oversize, below it the groove for receiving the washer has to have at least its width with a corresponding oversize and in the bottom region the groove has to have the width of the wrench width of the screw head with the necessary oversize. As this groove is only the width of the wrench width with oversize, the screw can be inserted but cannot turn in the groove and is therefore secured against twisting. This anti-twist safeguard is important so that the nut of the fastening fitting (10) can be tightened without the screw also turning.

The respective oversize results from product and manufacturing tolerances and is between 0.2 and 3.0 mm. The oversize can be selected differently for each width in the specified range.

[00023] The grooves can be inserted into the cage (30) from one side (the side facing the finger plate (20)) or from several sides. If processing is also carried out from below or from the side, these areas are then closed again with a cover or another sealing compound. It is also possible that a small area remains free as a drainage opening in relation to the concrete.

[00024] In the middle between the two fastening fittings (10), at least through the grooves for the screw shank or the thread, there is a hole in the diameter of the washer and oversize, so that the screw with washer can be inserted and then pushed into position. This insertion opening can also be made in another position so that one, both or even several screws can be threaded in one behind the other from one side. The central opening is only referred to here too for easier readability.

[00025] In an additional embodiment, a seal can be inserted between the cage (30) and finger plate (20) to prevent moisture from penetrating. In this case, the seal covers the surface of the milled groove from above (the side facing the finger plate (20)) and is itself positioned as a slight depression in the cage (30) and/or the finger plate (20) with a recessed, preferably milled geometry.

The seal consists of an elastomer, which includes all elastic rubbers and silicones.

The seal can take the form of a sealing plate with a specific external geometry and recesses for screws and a bolt, if fitted, and can be punched out of a sheet, but can also be produced by other molding processes, such as injection molding.

In the case of a recessed geometry in the cage (30) that substantially corresponds to the outer seal geometry, the seal, which is introduced in an accurately positioned manner by the recessed seal receptacle, positions the two screws protruding through the seal and an optional bolt in the correct position, making it much easier to later place the finger plate (20) on the screws.

[00026] In addition, there may be a shear pin (25) between the finger plate (20) and the cage (30). This shear pin (25) is inserted both in the finger plate (20) and in the cage (30) in a corresponding recess and serves to absorb forces. Such a shear pin (25) can, for example, better absorb shear stresses such as those caused by braking, accelerating or steering vehicles on the finger plate (20) than the fastening fittings (10) alone.

The recess is between 2 and 30 mm, preferably between 2 and 10 mm, both in the cage (30) and in the finger plate (20). It is understood that within these dimensions different recesses at cage (30) and fingerplate (20) are possible.

The recesses not only lead to more precise, defined contact surfaces, but also to force transmission by means of positive locking, which can transmit considerably safer shear loads, as with the otherwise prevailing frictional locking.

[00027] The defined processing of the corresponding receptacles allows a considerably more precise, planar machining, as it is possible over the entire cage (30) or the entire contact surface of the finger plate (20). This enables more precise force transmission from the finger plate into the cage and later into the substructure.

For better protection against corrosion, the shear pin (25) can also be inserted into the recesses with a liquid seal or another seal. A further advantage is the possibility of producing the shear pin (25) at different heights and thus adjusting it very easily to different roadway heights (60). For a higher height only longer screws are needed, the rest of the joint does not have to be changed. This is particularly advantageous for renovation work, if not only the joint but also the roadway (60) is renovated and this usually results in a different connection height.

The distance between cage (30) and finger plate (20) is between 0 and 200 mm, preferably between 5 and 130 mm.

The height of the shear pin (25) is therefore between 4 and 260 mm.

The shear pin (25) can be located next to the screw connection, but the fastening fitting (10) is preferably passed through the shear pin (25) or the shear pin (25) is pushed over the screws pre-positioned in the cage (30). For this purpose, the shear pins (25) have through holes at the corresponding positions for the screws of the fixing fitting (10), which makes it much easier to place the finger plate (20) on the screws later.

[00028] The cross-sectional shape of the shear pin (25) may be rectangular, preferably with rounded edges, oval, round or of a different geometry. A rectangular cross-section with semi-circular ends on both short sides is particularly preferred.

The shear pins (25) can be made of steel, stainless steel, other metals, in particular aluminum alloys, but also of plastic, in particular fiber-reinforced plastic.

[00029] Surface treatments of the shear pins (25), especially for better corrosion resistance, are also possible.

It is also possible to mark the height of the shear pins (25) with different colors or other markings for easier assembly.

[00030] Through the intermediate space between cage (30) and finger plate (20) it is also possible to include slots in the angle profile (40) towards the roadway (60), which serve for drainage. In this way, water that collects between different road layers and flows off to the parting line can be specifically drained off on a slope.

This avoids the risk of frost breaks or other moisture damage, as the moisture can be safely removed via the drainage profile in the middle of the joint.

[00031] Due to the more precise positioning of the contact surfaces and the defined pretension, the system generally tends to oscillate less, which is conducive to longer durability, as the system is subject to fatigue less quickly.

[00032] As soon as the screws with the washers have been inserted over the middle position for the corresponding fastening positions, both screws are aligned exactly with the sealing insert and the bolt is inserted and this action has been performed for all fastening positions of the respective finger plate (20), the finger plate (20) can be fitted, the washers inserted and the nuts of the fastening fitting (10) fastened to the screw and tightened with torque.

Once all the nuts have been tightened accordingly and the joint has thus been completed, the remaining upper openings are filled with a sealing compound in a flat way relative to the finger plate (20) and the roadway surface covering (60) so that no moisture, in particular salt water, can penetrate.

[00033] Although it does not comply with the valid standard, the nut and washer can of course also be inserted into the described receiving grooves in the cage (30) for the present fastening arrangement and, after optional insertion of a seal and/or bolt, the finger plate (20) can be tightened from above with the screws. This also makes it easier to change the system than it is currently the case.

[00034] In the region of the contact surface between finger plate (20) and cage (30), the finger plate (20) can be offset by 0.5 to 5 mm so that the finger plate (20) is 0.5 to 5 mm thicker in the region of the free expansion joint.

To avoid a notch effect, the joint shall be designed harmoniously as a radius or chamfer. The protrusion of the finger plate (20) reduces the risk of moisture, in particular salty air humidity, being drawn in between the cage (30) and the finger plate (20) during slight movements between the finger plate (20) and the cage (30) by a suction or capillary effect, which would lead to corrosion and should therefore be avoided.

[00035] In the case of renovation, for example if individual fingers of the finger plate (20) are broken, material fatigue occurs or there is a risk of breakage, etc., the sealing compound is removed first. Then all nuts are removed and the finger plate (20) can be lifted off. After removing the bolt and the seal, the individual screws can be removed easily, quickly and without tools via the center hole and replaced with new screws.

Assembly is again carried out in reverse order, or as described above. Due to the possibility of using shear pins (25) with different heights, it is easy to adjust to different heights towards the roadway (60).

[00036] Thus, a connection conforming to standards has been achieved with the embodiment of the fastening arrangement in accordance with the invention, since the nut of the fastening fitting (10) is acted upon with torque, and furthermore a simple and rapid exchange possibility of the entire fastening fitting (10) is possible in the case of maintenance.

This was the object of the invention.

List of reference numerals 10 Fastening fitting 20 Finger plate 25 Shear pin 30 Cage 40 Fixing bracket 41 Reinforcing iron 50 Angle profile 60 Roadway surface covering

Claims

Roadway junction consisting of a cage (30) and a finger plate (20) screwed thereto by means of a fastening fitting (10), characterized in that the screw and a washer for the fastening fitting (10) are inserted into at least one groove in the cage (30), comprising various widths for receiving the screw head, the base s washer and the screw shank, the screw head is positioned secured against rotation and the tightening torque is provided via the nut of the fastening fitting (10).

Roadway junction according to claim 1, characterized in that the respective width of the nut has a 0.2 to 3 mm upper dimension relative to the width of the screw head, the washer and the screw shaft.

Roadway junction according to claim 1 or 2, characterized in that the insertion of a screw and a substrate's disc takes place from above via a bore extending perpendicular to the grooves provided.

Road crossing according to one of claims 1 to 3, characterized in that a seal is inserted between cage (30) and finger plate (20).

Roadway junction according to one of claims 1 to 4, characterized in that the seal comprises a sealing plate with a certain outer geometry and recesses for screws and possibly bolts.

Roadway junction according to one of claims 1 to 5, characterized in that the seal is inserted into the cage (30) positioned in a weak recess and the seal for its position positions the screw.

Road crossing according to one of claims 1 to 6, characterized in that a shear pin (25) is inserted between cage (30) and finger plate (20) for the purpose of absorbing shear forces.

Roadway junction according to at least one of claims 1 to 9, characterized in that the pin (25) of this offset comprises a rectangular cross-sectional geometry which is rounded on the short sides.

Roadway crossing according to at least one of claims 1 to 8, characterized in that the cross-sectional geometry of the shear pin (25) is made as a recess in both the finger plate (20) and in the cage (30).

Roadway crossing according to at least one of claims 1 to 9, characterized in that the recess in the finger plate (20) and in the cage (30) is between 2 and 30 mm, preferably between 2 and 10 mm.

Roadway crossing according to one of claims 1 to 10, characterized in that the free space between finger plate (20) and cage (30) is between 0 and 200 mm, preferably between 5 and 130 mm.

Road crossing according to one of claims 1 to 11, characterized in that the height of the shear pin is between 4 and 260 mm.

Road crossing according to one of claims 1 to 12, characterized in that shear pins (25) of different height are marked with color.

Road crossing according to one of claims 1 to 13, characterized in that the entire fastening fitting (10) can be replaced without drilling, milling or welding work.

Roadway crossing according to one of claims 1 to 14, characterized in that the finger plate (20) in the region of the contact surface with the cage (30) is made as 0.5 to 5 mm thinner.