EP2483477B1 - Device for bridging an expansion joint - Google Patents

Description

The invention relates to a device for bridging an expansion joint in the area of a carriageway, comprising a superstructure and a substructure, the superstructure having at least one elastic element and the substructure forming a support for the superstructure.

Such devices for bridging expansion joints between roads and bridge structures are already known from the prior art.

For example, the CH 691 496 A5 a connecting structure for components experiencing expansion and / or shrinkage, which comprises an elastic connecting layer which is provided with flexible reinforcement means attached to the components. The flexible reinforcement means can be formed by at least one spring cast into the connecting layer, the ends of which are supported on the respective components. The spring is in particular a prestressed tension spring. Furthermore, a wire mat can be cast into the elastic connecting layer as a flexible reinforcement means. The elastic connecting layer is formed by an expandable and shrinkable polymerized bitumen.

The DE 32 25 304 C2 describes an expansion joint cover in roadways with an elastomeric expansion element, which is watertightly accommodated in recesses from the joint on both sides of boundary bodies made of elastomer concrete, which are made at the construction site by pouring corresponding recesses in the roadway so that they connect to the roadway at the roadway. The expansion element consists of an elastomer which corresponds to the elastomeric component of the edge body. This expansion element, produced by casting between the edge bodies, closes the joint between the edge bodies and adheres firmly to them. In addition to the elastomeric component as a binder, the elastomer concrete of the edge body has a mineral grain Aggregate on. The elastomer of the expansion element or the elastomeric component of the edge body can be formed by a cold-curing polyurethane.

From the DE 37 39 717 C1 A device for bridging expansion joints in roadways is known, with an extruded mat of elastomeric material bridging the joint, the longitudinal edges of which are parallel to the joint and are each fastened in an upwardly open groove of an edge-side holding profile, for which purpose ribs are formed on the underside of the mat engage the groove in a form-fitting manner and essentially fill it up except for a remaining anchoring space. The anchoring space is connected to the upper side via holes or slots in the mat which form casting channels. The ribs are connected to the holding profile by means of a cast body made of an elastomeric synthetic resin and filling the casting channels and the anchoring space. The synthetic resin can be formed, for example, by polyurethane. The elastomeric mat itself is made of rubber.

The US 6561728 B1 discloses an expansion joint bridging device having an elastic element cast on site from a mixture of polyurethane and bitumen. In order to match the surface properties of the elastic element to that of the adjacent road sections, the element can be coated with sand or a dulling material.

Another expansion joint bridging device with on-site cast elastic element and embedded holding profile describes the WO99 / 52981 A1 ,

From the company COLAS GmbH, A-8101 Gratkorn, an elastic covering expansion joint is known under the name "Thorma® Joint", which is formed in a mat construction from polymer-modified bitumen and a mineral supporting body from hard stone.

The object of the present invention is to provide an improved device for bridging an expansion joint in the area of a roadway. This object is achieved by the device specified in claim 1. The expansion joint bridging device according to the invention is characterized - in addition to other features - in particular in that at least one holding element is arranged in the superstructure structure and is at least partially embedded in the elastic element. It This strengthens the bond between the superstructure and the substructure in the vertical area of the contact area between the elastic element of the superstructure and the adjacent road surface, so that this contact area is relieved and peeling as a result of compressive or tensile stresses is reduced. In the horizontal area, the at least one holding element improves the adhesion of the elastic element to the substructure. An improved mechanical resilience of the device is thus achieved, so that it has a longer service life and maintenance work and the associated costs can be reduced.

In that, according to the invention, the holding element (s) are formed by an angle profile or by angle profiles, legs are present on this holding element or these holding elements, which extend into the elastic element and thus the adhesion of the holding element or the holding elements to the elastic Element can be improved, which in turn higher forces are transferable.

It is provided according to the invention that the holding element extends at least approximately over the entire length of the superstructure. In other words, the holding element extends at least approximately over the entire length of the expansion joint. This not only simplifies the construction of the device itself - the elastic element is produced on site by casting, as will be explained in more detail below - but can thus further improve the expansion joint absorbable, applied forces can be achieved by distributing these forces over a larger area within the elastic element and thus local differences in the load on the holding element or the device do not come into play or are reduced. It can preferably be provided that the holding element (s) have at least one recess into which the elastic element protrudes. A better embedding of the holding element or the holding elements in the elastic element is thus achieved, which in turn can improve the mechanical stability of the device, in particular against peeling.

In the embodiment of the device according to the invention, the elastic element of the superstructure structure is at least partially formed from a pourable synthetic resin or plastic, in that it at least partially consists of a polyurea or a polyurea system. On the one hand, this improves the simple manufacture of the device on the construction site, and on the other hand, unlike bituminous systems, it can still be driven on even at high climatic temperatures, for example in direct sunlight, where bituminous systems are already softening. In addition, a polyurea or a polyurea system is more wear-resistant than the systems based on bitumen known in the prior art. In particular, the use of a polyurea or a polyurea system also better prevents the formation of ruts, depressions and the leakage of the surface. The polyurea or polyurea system can be installed cold in a wide temperature range. Conventional bituminous systems have to be installed hot, which is associated with considerable energy consumption and high noise emissions. Furthermore, larger distances than before can be mastered, i.e. bridged.

By using a polyurea or a polyurea system to produce the elastic element, it is possible that the layer thickness of the elastic element is a maximum of 60 mm. In contrast to the asphalt expansion joints on the market, this elastic element is therefore rather thin. This reduction in the layer thickness has the advantage that the deformation forces are lower. The deformation forces that occur when the length of the structures changes (tension / compression), on the one hand, cause a load on the adjacent components, such as abutments, structures, bridge bearings, and, on the other hand, internal stresses in the material of the elastic element. The reduced layer thickness of the elastic element therefore allows the adjacent and subsequent components of the building to be made smaller and more economically.

The substructure can at least partially consist of a material from the group comprising epoxy resins, polymer concrete, concrete, metals, such as steel. This provides an inexpensive to produce substructure that provides the necessary rigid properties to support the superstructure, that is, in particular the elastic element.

It is preferred if the holding element (s) is or are connected to the substructure with at least one composite anchor. This embodiment variant of the invention further increases the load-bearing capacity of the device in that peeling in the area of the elastic element can be better prevented by fastening the holding element or the holding elements to the substructure, that is to say the supporting structure. Furthermore, after the holding element or the holding elements protrude with their upper side into the elastic element and thus also the composite anchor (s) protrudes or protrude with its one end into the elastic element, a better composite effect is achieved, which leads to the removal contributes to the compressive or tensile stresses occurring on the adhesive surface between the superstructure and the substructure.

According to a further embodiment variant, it is provided that at least one thrust nose, preferably extending continuously over at least approximately the entire length of the superstructure, is formed on the elastic element on an underside pointing in the direction of the substructure. On the one hand, a mechanical connection is created between the elastic element and the substructure, whereby the contact area between the superstructure, ie the elastic element, and the substructure is relieved of shear stresses. on the other hand This increases the contact area, which can reduce the adhesive tension.

At least one stabilizing element can be arranged in the elastic element. It is thereby achieved that the elastic element can accommodate expansion or displacement paths that are much larger than the simple, elastic covering expansion joints made of bituminous materials.

In addition, according to a further embodiment variant of the device, the stabilizing element or the stabilizing elements can have a sleeve-shaped element or sleeve-shaped elements in which the stabilizing element or in which the stabilizing elements are arranged. The sleeve-shaped element or the sleeve-shaped elements act as thrust sleeves, in which the stabilizing element or the stabilizing elements are guided and in which they can move, whereby the effect of the stabilizing elements as reinforcement for the elastic element of the superstructure can be improved.

This is preferably supported or the stabilizing element (s) are supported on the holding element or on the holding elements, as a result of which the stabilization of the expansion joint can be improved via these stabilizing elements and the holding elements.

It is advantageous if the stabilizing element (s) extends between the upwardly projecting legs of the angle profiles, that is to say the legs of the angle profiles protruding into the elastic element, in particular abuts these legs in order to further improve the stabilization function to achieve the interaction of the stabilizing elements with the holding element or the holding elements.

It can further be provided that the stabilizing element (s) has or have a compression spring in order to prevent the stabilizing elements from being detached from the elastic element.

According to a further embodiment variant, it is provided that the stabilizing element (s) or the sleeve-shaped element (s) are at least partially surrounded by a spiral hose. This is in particular cast in the elastic element and has the effect that strains are transmitted uniformly to the stabilizing element or the stabilizing elements. In addition, the friction with the elastic element, that is, for example, the polyurethane casting, is thereby reduced or avoided.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

Fig. 1

eine erste Ausführungsvariante einer erfindungsgemäßen Vorrichtung in Seitenansicht geschnitten;

Fig. 2

eine andere Ausführungsvariante der Vorrichtung in Seitenansicht geschnitten;

Fig. 3

ein Detail aus einer erfindungsgemäßen Vorrichtung im Bereich eines Stabilisierungselementes.

Each shows in a schematically simplified representation:

Fig. 1

a first embodiment of a device according to the invention cut in side view;

Fig. 2

another embodiment variant of the device cut in side view;

Fig. 3

a detail from a device according to the invention in the region of a stabilizing element.

To begin with, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, and the disclosures contained in the entire description can be applied analogously to the same parts with the same reference numerals or the same component names. The position information selected in the description, such as, for example, top, bottom, side, etc., are based on the figure described and illustrated immediately, and are to be transferred accordingly to the new position when the position changes.

Fig. 1 shows a device 1 for bridging an expansion joint 2 between a carriageway 3 and an adjoining carriageway 4 of a bridge, in particular a road bridge.

The device 1 has a superstructure structure 5 and a substructure structure 6.

In this embodiment variant, the substructure 6 comprises two spaced-apart floor elements 7, 8 which extend into the area of the expansion joint 2. A substructure threshold 9, 10 is arranged on each of these floor elements 7, 8, in particular connected to the floor elements 7 and 8, respectively.

The floor elements 7, 8 can consist, for example, of a concrete as used in road construction.

The two substructure sleepers 9, 10 are arranged between the carriageways 3, 4 in the expansion joint 2 and can in particular be made of an epoxy resin or a polymer concrete or another suitable, rigid building material. In particular, it is also possible to manufacture these two substructure sleepers 9, 10 on site at the construction site, provided that prefabricated elements have not already been used for this.

The substructure 6 is rigid with respect to the superstructure 5. The term "rigid" in the sense of the invention means that this substructure 6 or its components, with the exception of thermal expansions or shrinkages, undergo no further dimensional changes during the operation of the device 1.

The two substructure sleepers 9, 10 preferably have a width 11, 12 which is dimensioned such that a gap formed by the spaced arrangement of the two floor elements 7, 8 with respect to one another is not constricted, that is to say preferably the end faces of the substructure sleepers 9, 10 facing one another are respectively aligned with the respective end faces of the two floor elements 7, 8 facing each other, as shown in FIG Fig. 1 is shown.

In the connection area to the expansion joint 2 and partially extending into the expansion joint 2, a sealing element 13, 14, for example a sealing film, as is known from the prior art, is arranged between the carriageways 3, 4 and the floor elements 7, 8.

The superstructure 5 comprises an elastic element 15 which extends bridging between the two lanes 3, 4 and the expansion joint 2. In particular, this elastic element is formed on the upper side in alignment with the surfaces of the carriageways 3, 4, so that there is no or no significant increase or depression in the area of the expansion joint 2 on the carriageway side.

The elastic element 15 is supported on the substructure sleepers 9, 10. After the elastic element 15 is produced in cast construction from a synthetic resin or plastic directly at the construction site, there is the possibility that the material of the elastic element 15 is at least in those areas in which this elastic element 15 is directly connected to the substructure sleepers 9, 10 rests to form a contact surface 16 connects.

A cold-curing, castable synthetic resin or a cold-curing, castable plastic is used for the elastic element 15, namely a polyurea or a polyurea system, in order to be able to produce the elastic element 15 directly at the construction site by casting. A polyurea or polyurea system with a hardness adapted to the use is used as the polyurea or polyurea system, so that, on the one hand, the deformation is made possible with the least possible resistance and, on the other hand, the stresses from traffic result in the least possible deformation. For example, a 2K polyurea system can be used. The polyurea or polyurea system can have a Shore A hardness of 55 to 85. The tensile strength of the polyurea or polyurea system according to DIN 53504 can be between 10 and 30 N / mm ² . Furthermore, the polyurea or the polyurea system can have an elongation according to DIN 53504 of between 400 and 1200%. It is particularly advantageous if a polyurea or a polyurea system with thixotropic properties is used or if the viscosity at 23 ° C. is between 4000 and 6000 mPas.

In order to improve the adhesion, an adhesion promoter, a so-called primer, can also be applied in advance.

In the area of the gap which is formed in the horizontal direction between the substructure shafts 9, 10 or floor elements 7, 8, a cover element 17 is arranged on the substructure shafts 9, 10, which covers this gap in particular in a moisture-tight manner. This cover element 17 can consist, for example, of a metal or plastic strip. The cover element 17 preferably has a centering element 18 for the more precise installation of this cover element 17 or for increasing the operational safety of the device 1, the centering element 18 projecting into the gap between the two floor elements 7, 8 or the substructure sleepers 9, 10.

To improve the bond between the elastic element 15 and the substructure sleepers 9, 10 in the embodiment variant according to Fig. 1 , Two holding elements 19, 20 are arranged in the region of the contact surface 16. The two holding elements 19, 20 are thus embedded in the elastic element 15, at least on the surface which projects in the direction thereof.

The holding elements 19, 20 are in the form of angular elements with a base 21, 22 and from the base 21, 22 at least approximately at right angles upwards and are embedded in the elastic element 15 and projecting legs 23, 24. The two legs 23, 24 as shown, preferably facing the lanes 3, 4 in each case.

The holding elements 19, 20 preferably consist of a metal, for example steel.

To improve the bond between the elastic element 15 and the holding elements 19, 20, the latter can have at least one recess, these are preferably designed as a perforated plate or perforated plate, so that during the production of the elastic element 15 from the pourable, hardenable synthetic resin or to let the plastic enter this or these recesses.

The two holding elements 19, 20 extend over the entire length of the expansion joint 2, which extends in the direction of the viewing direction of the embodiment variant to Fig. 1 extends. However, there is also the possibility that several individual holding elements 19, 20 are arranged next to one another in the direction of the length. In addition, there is also the possibility that only a single holding element 19, which rests on both substructure sleepers 9, 10 and is arranged to bridge the gap, is used. In this case, it is advantageous if this single holding element 19 has at least one elastic area, for example in the area of the gap, between the substructure sleepers 9, 10 or the floor elements 7, 8, in order to thereby expand or shrink the device 1 to enable due to the dimensional changes of the roadways 3, 4 or the road and the bridge caused by temperature change. For this purpose, this holding element 19 can be formed in several parts with an elastic intermediate piece, or there is also the possibility, by geometrical design of the holding element 19, of making this expansion or shrinking possible. For this purpose, this holding element 19, in particular in the area of the gap, can be zigzag-shaped or accordion-shaped, etc.

In order to improve the connection between the holding elements 19, 20 and the substructure 6, the holding elements 19, 20 can each be provided with at least one connecting anchor 25, 26, these connecting anchors 25, 26 extending from the elastic element 15 to at least in the area of substructure sleepers 9 and 10, preferably down to the area of floor elements 7 and 8, as in Fig. 1 shown, protrude. In particular, this composite anchor 25, 26 can be held with a corresponding dowel in the substructure threshold 9, 10 and / or that of the floor element 7, 8. There is also the possibility that these composite anchors 25, 26 are already concreted in with the floor element 7, 8 or are poured into the substructure sleepers 9, 10. The upper ends of the composite anchors projecting into the elastic element 15 are embedded in the elastic element 15 during the production of the elastic element 15 from the synthetic resin or the plastic by casting the expansion joint 2.

Although it is possible that only one composite anchor 25, 26 is arranged on each side of the expansion joint 2, it is preferably provided in the context of the invention that a plurality of such composite anchors 25, 26 are arranged next to one another and preferably at regular intervals in the longitudinal direction of the expansion joint 2 ,

In the embodiment variant in which a plurality of holding elements 19, 20 are arranged next to one another in the direction of the longitudinal extent of the expansion joint 2, each of these holding elements 19, 20 preferably has its own composite anchor 25, 26.

The composite anchors 25, 26 are preferably made of a metal, in particular steel.

According to a further embodiment variant of the invention, it is provided that the elastic element 15 has at least one thrust nose 27 on both sides of the expansion joint 2, that is to say on each side in the region next to the gap formed between the substructure sleepers 9, 10 or floor elements 7, 8. These two push noses 27, 28 are produced during the manufacture of the elastic element 15 by pouring the expansion joint 2 with the synthetic resin or the plastic, for which purpose corresponding groove-like grooves are provided in the substructure shafts 9, 10 to prevent the synthetic resin from escaping or entering or the plastic in these grooves. This makes it possible for these thrust lugs 27, 28 to be produced in one piece with the elastic element 15. The recesses in the holding elements 19, 20 enable the synthetic resin or the plastic to enter the grooves in the substructure shafts 9, 10.

However, there is of course also the possibility within the scope of the invention that a plurality of such thrust lugs 27, 28 are arranged one behind the other within one of the substructure sleepers 9, 10 in the direction of travel.

These push lugs 27, 28 preferably extend continuously over the entire length of the expansion joint 2 or the elastic element 15, but there is also the possibility of arranging a plurality of such push lugs 27, 28 next to one another in the direction of the length of the expansion joint 2.

Furthermore, the push lugs 27, 28 can have a rectangular cross section, viewed in the direction of the length of the expansion joint 2, and the cross sections of the groove-like grooves can also have at least one undercut, whereby a better bond is achieved by the synthetic resin or the plastic Filled undercuts. The push lugs 27, 28 can also have square, polygonal, etc. cross sections.

In Fig. 2 An embodiment variant of the device 1 according to the invention is shown. This embodiment variant essentially resembles device 1 Fig. 2 after that Fig. 1 with the exception that in each case a floor element 7, 8 is formed in one piece with each of the substructure sleepers 9, 10. For example, these elements of the substructure 6 can be produced from a structural concrete or the like by casting.

With regard to the further details of this embodiment variant of the invention, reference is made to the explanations Fig. 1 referenced to avoid unnecessary repetitions.

The elastic element 15 preferably has a layer density 29 ( Fig. 1 ), which is a maximum of 60 mm, in particular a maximum of 50 mm.

Fig. 3 shows a detail of an embodiment variant of the device 1. It is possible within the scope of the invention that at least one stabilizing element 30 is arranged in the elastic element 15. For example, this stabilizing element 30, preferably several such stabilizing elements 30 distributed over the length of the expansion joint 2, can be formed from a round steel. Other geometric, rod-like shapes are also possible. These stabilizing elements 30 reinforce the elastic element 15 and thus improve its mechanical properties. In the preferred embodiment, the stabilizing element 30 or the stabilizing elements 30 are supported on the holding element (s) 19, 20. In particular, the support is provided on the two legs 23, 24 of the holding elements 19, 20, as shown in FIG Fig. 3 is shown. Nuts and washers (not shown) can be arranged on the ends facing the two legs 23, 24 of the holding elements 19, 20 in order to achieve a pretensioning of the stabilizing elements 30 between the two legs 23, 24. It is also possible for a compression spring 31, for example a spiral spring, to be attached over at least part of the stabilizing elements 30 in order to prevent the stabilizing elements from being detached from the potting of the elastic element 15.

In the preferred embodiment variant, the stabilizing elements 30 are not embedded directly in the elastic element 15, but rather these stabilizing elements 30 are guided in a sleeve-shaped element 32, which in each case surrounds a stabilizing element 30 in the radial direction.

It is possible for a plurality of stabilizing elements 30 to be arranged in a sleeve-shaped element 32, but this is not the preferred embodiment variant since volume is lost in order to form the elastic element 15.

In order to prevent friction between the elastic element 15, it can be provided that instead of the sleeve-shaped elements 32 or in addition and surrounding them, a spiral hose 33, for example made of plastic, is provided, which is cast into the elastic element 15 during its manufacture. This also enables the strains to be transmitted uniformly to the stabilizing elements 30.

The exemplary embodiments show possible design variants of the device 1, it being noted at this point that the invention is not restricted to the specially illustrated design variants thereof, but according to the scope of protection defined by the appended claims. Various combinations of the individual design variants with one another are also possible, and this variation possibility lies in the ability of the person skilled in the art in this technical field due to the teaching of technical action through the subject invention.

For the sake of order, it should finally be pointed out that, for a better understanding of the structure of the device 1, these or their components have been partially shown to scale and / or enlarged and / or reduced.

REFERENCE NUMBERS

1

contraption

2

expansion joint

3

roadway

4

roadway

5

superstructure construction

6

substructure

7

floor element

8th

floor element

9

Underbench wave

10

Underbench wave

11

width

12

width

13

sealing element

14

sealing element

15

element

16

contact area

17

cover

18

centering

19

retaining element

20

retaining element

21

Base

22

Base

23

leg

24

leg

25

Xings

26

Xings

27

pressure lug

28

pressure lug

29

layer thickness

30

stabilizing element

31

compression spring

32

element

33

Spiralschlauch

Claims (12)

1. A device (1) for bridging an expansion joint (2) in the region of a carriageway, comprising a superstructure (5) and a substructure (6), with the following features:

   The substructure (6) forms a support for the superstructure (5);

   the superstructure (5) comprises at least one elastic element (15);

   there is disposed in the superstructure (5) at least one holding element (19, 20) which is at least partially embedded in the elastic element (15);

   the at least one holding element (19 20) is formed by an angle profile or by angle profiles, respectively, and is disposed so as to extend continuously across at least almost the entire length of the superstructure (5);

   the elastic element (15) of the superstructure (5) is cast in-situ,

   characterized in that the elastic element (15) is at least partially made from a cold-hardening castable synthetic resin or a cold-hardening castable plastic in the form of a polyurea system.
2. The device (1) according to claim 1, wherein the at least one holding element (19, 20) has at least one recess into which the elastic element (15) extends.
3. The device (1) according to claim 1 or claim 2, wherein the elastic element (15) has a layer thickness (29) of at most 60 mm.
4. The device (1) according to one of claims 1-3, wherein the substructure (6) is made at least partially from at least one material from the group consisting of epoxy resins, polymer concrete, concrete, and steel.
5. The device (1) according to one of claims 1-4, wherein the at least one holding element (19, 20) is connected to the substructure (6) via at least one bonding anchor (25, 26).
6. The device (1) according to one of claims 1-5, wherein at least one shear key (27, 28) is formed at the elastic element (15) at a bottom face pointing forwards the substructure (6), which shear key preferably extends continuously across at least approximately the entire length of the superstructure (5)
7. The device (1) according to one of claims 1-6, wherein at least one stabilizer element (30) is disposed in the elastic element (15).
8. The device (1) according to claim 7, wherein the at least one stabilizer element (30) is disposed in at least one sleeve-shaped element (32).
9. The device (1) according to claim 7 or claim 8, wherein the at least one stabilizer element (30) is supported on the at least one holding element (19, 20).
10. The device (1) according to one of claims 7-9, wherein the at least one stabilizer element (30) extends between upwardly projecting arms (23, 24) of the angle profiles.
11. The device (1) according to one of claims 7-10, wherein the at least one stabilizer element (30) has a compression spring (31).
12. The device (1) according to one of claims 7-11, wherein the at least one stabilizer element (30) or the at least one sleeve-shaped element (32) is at least partially surrounded by a spiral hose (33).

Images