EP2194190A1 - Expansion joint bridging device - Google Patents

Abstract

The expansion joint-bridging device has two profiles (3) with a width adjustable expansion joint gap (D) arranged between the profiles. The two profiles are movable relative to each other. A deformed liner sheet (1) is extended through the expansion joint gap, and is fixed at edge-side in the both profiles. The hollow spaces are filled with a sealing medium (14), and are provided in a reception groove (4). The hollow spaces are bounded by the reception groove and an edge section (2) of the liner sheet. An independent claim is also included for a method for reconstructing of an expansion joint-bridging device.

Description

The present invention relates to an expansion joint bridging device, comprising two relatively movable profiles with a width-adjustable expansion joint gap between them, over which extends a deformable sealing web which is fixed peripherally to the two profiles, wherein the sealing web has thickened profiled edge portions, respectively are positively received in an associated receiving groove of the respective profile.

Expansion joint bridging devices, also referred to as lane transitions, are used in particular in road construction and road construction, in order to compensate for a thermal expansion or shrinkage of the superstructure. Depending on the maximum degree to be compensated, unicellular or multicellular expansion joint bridging devices are used, the former comprising exactly two profiles and a sealing membrane arranged between them, the latter meanwhile having a larger number of profiles and a plurality of sealing membranes. Multicellular expansion joint bridging devices, as encompassed by the present invention, are often referred to as lamellae lane transitions because of their construction.

For example, referring to the prior art concerning known generic expansion joint bridging devices, reference is made to the following documents: DE 197 05 531 A1 . EP 1 327 026 Bl . DE 44 33 909 A1 . DE 41 38 347 A1 . DE 198 03 004 A1 . DE 196 30 328 A1 . EP 0 821 104 B1 . EP 1 621 674 A1 . DE 88 16 536 U1 . DE 35 22 864 A1 and DE 80 10 697 U1 , The arranged between each two adjacent profiles geomembrane is intended to prevent water and / or dirt or debris from entering the expansion joint gap in the area of the expansion joint bridging device and cause damage there or impair the functionality. Typically, the thickened edge portions of the geomembrane have this specific profiles, which should provide in conjunction with the correspondingly shaped grooves of the respective profiles for a seal.

The present invention has for its object to provide an expansion joint bridging device of the type mentioned, which is characterized for improved protection of the components arranged below the geomembrane by a particularly effective sealing of the geomembrane (s) against the associated profiles.

The above-mentioned problem is solved by existing in an expansion joint bridging device of the generic type existing in the grooves, through this and the respectively recorded therein edge portion of the geomembrane cavities are filled with a subsequently introduced therein sealing medium. Inventive expansion joint bridging devices are characterized in other words by the fact that in the grooves of the profiles existing cavities, which are bounded by the inner surface of the respective receiving groove and the outer surface of the inserted into the respective receiving groove edge portion of the geomembrane, subsequently, that is after the relevant profiled edge portion of Sealing membrane has been inserted into the associated receiving groove of the profile in question, is filled with a introduced into the cavity in question sealing medium. This can be done in the context of the present invention with newly installed expansion joint bridging devices - more or less immediately after the insertion ("buttoning") of the geomembrane (s) between the profiles - already factory. A particularly important field of application of the present invention, however, forms the rehabilitation of existing expansion joint bridging devices, especially when - sometimes only after many years of use - the binding of the geomembrane (s) to the associated profiles proves to be leaking. Such leaks are often localized, for example, areas in which the receiving groove bent, kinked or angled runs such as the transition from the roadway area to the sidewalk area in or on Schrammbord. Of utmost importance, both in commercial terms and in terms of minimizing the impact on traffic in the event that rehabilitation of an existing expansion joint bridging device proves necessary, the possibility of resorting to the expansion joint bridging device in accordance with the present invention that is, to make the production of a perfectly tight connection of the existing geomembranes to the profiles without any impairment or restriction of the traffic routed via the corresponding traffic route. For in typical expansion joint bridging devices, in particular those which are designed to be multi-celled, the sealing medium can be introduced by suitable measures (see below) from below into the cavities in question contribute. In many cases, in this way, the removal of the existing geomembrane (s) and installing new geomembranes, which is not only associated with considerable expense, but also requires a blockage of the corresponding traffic route, by way of rehabilitation of an existing expansion joint bridging device according to the present Invention can be avoided. Regardless of the possibly only local sealing of the connection of the geomembrane (s) to the profiles noticeably more economical than the replacement of basically functional geomembranes against new. It is apparent from the above explanations of the invention, which is again expressly referred to here for the sake of completeness, that not necessarily all existing in the respective receiving groove, through the inner surface and the outer surface of the edge portions of the geomembrane limited cavities filled with the sealing medium but rather that, depending on requirements and application, possibly only a few of a plurality of such cavities are filled with sealing medium.

The present invention is not only applicable to such expansion joint bridging devices, in which the cavity to be filled with the sealing medium by a through the inner wall of the receiving groove and the outer surface of the recorded therein edge portion of the geomembrane limited, extending in the longitudinal direction of the respective edge portion constructive defined sealing cavity is formed. Rather - and in particular - can be filled within the meaning of the present invention subsequently by introducing a sealing medium, such cavities, the are not provided by design and, for example, result from a lack of dimensional stability of the profile and / or the geomembrane or arise over time by aging phenomena such as shrinkage and / or damage. The same applies to tolerance-related cavities. In that regard, it should be pointed out that the cavities to be filled with the sealing medium need not extend over the entire longitudinal extent of the geomembrane, but rather may also be locally limited (eg concentrated to areas in which the edge portions of the geomembranes are bent, kinked or discarded ). Corresponding local leaks, which can be remedied with minimal effort in application of the present invention, can be determined in particular by regular inspections of the expansion joint bridging devices, in particular by traceability of traces of water or the like.

Depending on the construction of the expansion joint bridging device, different possibilities are possible for introducing the sealing medium into the cavity in question. For example, each profile may have at least one defined injection channel, which opens into the associated receiving groove. With correspondingly wide expansion joint bridging devices, depending on the type of sealing medium to be introduced into the cavity (see below), optionally a plurality of injection channels are provided distributed over the extension of the profiles. In this case, the injection channels can already have been introduced into the profile concerned at the factory. In particular, in the case of rehabilitation of an existing expansion joint bridging device however, they are typically drilled on site. Wherever possible and expedient, especially in multicellular expansion joint bridging devices, it is particularly advantageous if the at least one injection channel is accessible from below. It has already been pointed out above that one of the decisive advantages of this embodiment, namely that the renovation of an existing expansion joint bridging device can be carried out in flowing traffic. It is also favorable in this embodiment that the risk of foreign bodies entering (temporarily) open injection channels is extremely low. In newly manufactured, yet to be installed expansion joint bridging devices, it does not matter or only less pronounced on the above points, so that when applying the present invention to new expansion joint bridging devices optionally offers that the at least one injection channel is accessible from above ,

According to another preferred embodiment of the invention, it is provided that the at least one injection channel is closed by means of a return flow-blocking nipple. In particular, commercially available lubricating nipples can be used which are hammered or screwed into the injection channels. In the latter case, a thread is cut into the injection channels, after they have been drilled into the profiles for the purpose of applying the present invention, after drilling. These are also measures that can be easily carried out on site in the context of the renovation of an existing expansion joint bridging device. The particular advantage of using said backflow stopper nipple is that in the event that an extended cavity - through several injection channels through - is to be filled with a sealing medium, this introduced in rapid succession by means of a suitable tool (eg hand-lubricating or pressing unit) through the individual nipple into the cavity can be. This is particularly advantageous if a sealing medium is used, which is processable only for a limited period of time, as is the case for example for certain two-component sealing media (see below).

According to yet another preferred embodiment of the invention, a sealing medium is used, which is wasserquellfähig. This results in a sense a self-sealing effect by penetrating into the receiving water, which comes into contact with the sealing medium, whereby the latter swells.

In view of the achievable results have proven to be advantageous as a sealing medium in particular two-component sealing media whose viscosity increases after injection into the sealing cavity. In that regard, favorable, for example, a two-component sealing medium based on polyurethane resin. In particular, such sealing media may have a processing viscosity at 25 ° C of less than 180 mPas, which is suitable for typical applications of the present invention. Even more favorable, however, is a two-component sealing medium, which forms a hydrogel in the fully reacted state. In this sense, the two-component sealing medium may particularly preferably consist of an acrylate resin. Hereby can be Processing viscosities at 20 ° C of less than 5 mPas achieve. Such a low viscosity is not only beneficial because this sealing medium penetrates into very fine cavities (eg cracks) and provides an effective seal there. A very significant further advantage is that such a low-viscosity sealing medium can be introduced into the relevant cavity via suitable cannulas, which are pierced through the respective edge section of the sealing membrane and penetrate into the cavity to be filled. The hole left by the injection cannula when it is pulled out again in the edge section of the sealing membrane is thereby sealed by the sealing medium. Visible can be dispensed with the application of such low-viscosity sealing medium with suitable profiles and other structural conditions, where appropriate, on the introduction of special injection channels by drilling or the like, which again contributes to a further reduction associated with the rehabilitation of an existing expansion joint bridging device effort.

The present invention is, as stated above, particularly applicable to such expansion joint bridging devices in which the cavity to be filled with the sealing medium is formed by a structurally defined sealing cavity, through the inner wall of the receiving groove and the outer surface of the edge portion received therein the geomembrane is limited. In particular, several such sealing cavities can be arranged in each receiving groove. These can in particular by a sealing lip of the associated edge portion of the geomembrane, which on the inner wall of the receiving groove is present, separated from each other. According to an alternative embodiment, the individual sealing cavities arranged within a receiving groove can be delimited from one another by a sealing lip formed on the inner wall of the receiving groove and resting against the outer surface of the edge section of the sealing web received therein. In such designs, for example, a sealing cavity can be accessible from below via corresponding injection channels from above and another sealing cavity above this associated injection channels.

In a particular aspect, a two-component sealing medium based on an acrylate resin also proves to be advantageous from the point of view that the sealing medium does not make it more difficult to exchange the sealing sheet possibly later than is necessary. This is precisely what applies to said specific two-component sealing medium. Because despite the excellent sealing effect of introduced into the cavities in question, hardened therein sealing medium, the geomembrane can easily remove from the receiving groove. The cured sealing medium adheres even to the respective edge portion of the geomembrane, so that a complex cleaning of the receiving groove before a new geomembrane is used, is unnecessary. Remains that should adhere to the inner wall of the receiving groove can easily be pulled off in the manner of a rubber cord.

In addition, there are other benefits. Thus, the pot life over the selected mixing ratio of the components specifically to the respective task, in particular to the extent of the with the sealing medium adapted to be filled cavity. Also, a processing of this sealing medium over a very large temperature range (minus 5 ° C to plus 40 ° C) is possible, so far as there are no appreciable restrictions, as far as the seasonal time of rehabilitation of an expansion joint bridging device. Since the material is also water-soluble, a cleaning of the equipment as well as a disposal of residual amounts is easily and easily possible.

If, in application of the present invention, cavities are to be filled with the sealing medium, which extend over the entire length of the receiving groove, as is the case with design-defined defined sealing cavities, the two ends are expediently closed before the introduction of the sealing medium into the respective sealing cavity. There to prevent leakage of the sealing medium. This is advantageous because it favors complete filling of the cavity.

Fig. 1

eine aus dem Stand der Technik bekannte eingebaute einzellige Dehnfugen-Überbrückungsvorrichtung im Vertikalschnitt,

Fig. 2

eine Möglichkeit der Anwendung der vorliegenden Erfindung auf die eingebaute Dehnfugen-Überbrückungsvorrichtung nach Fig. 1,

Fig. 3

eine Abwandlung der in Fig. 2 gezeigten Vorgehensweise,

Fig. 4

eine Möglichkeit der Anwendung der vorliegenden Erfindung auf die in Fig. 1 eingebaut gezeigte Dehnfugen-Überbrückungsvorrichtung vor deren Einbau,

Fig. 5

eine aus dem Stand der Technik bekannte mehrzellige Dehnfugen-Überbrückungsvorrichtung im Vertikalschnitt und

Fig. 6

eine Möglichkeit der Anwendung der vorliegenden Erfindung auf die Dehnfugen-Überbrückungsvorrichtung nach Fig. 5.

Hereinafter, the present invention will be explained in more detail with reference to two illustrated in the drawing preferred embodiments. It shows

Fig. 1

a built-in single-cell expansion joint bridging device known from the prior art in vertical section,

Fig. 2

a way of applying the present invention to the built-in expansion joint bridging device according to Fig. 1 .

Fig. 3

a modification of the in Fig. 2 shown procedure,

Fig. 4

a possibility of applying the present invention to the in Fig. 1 built-in shown expansion joint bridging device prior to its installation,

Fig. 5

a known from the prior art multi-cell expansion joint bridging device in vertical section and

Fig. 6

a way of applying the present invention to the expansion joint bridging device according to Fig. 5 ,

In the Fig. 1 shown expansion joint bridging device is known from the practical use. She is still detailed in the WO 2006/002992 A2 , to which reference is made in its entirety and the disclosure of which is incorporated by reference into the content of the present patent application. An explanation of the structure of in Fig. 1 Therefore shown expansion joint bridging device is unnecessary.

In view of the specific nature of the present invention, only particular reference is made to the consisting of an elastically deformable material, a Dehnfugenspalt D bridging or this covering geomembrane 1, which has two thickened, profiled edge portions 2. In the two metallic profiles 3 grooves 4 are formed, in which the thickened edge portions 2 of the geomembrane 1 used ("buttoned") are. In this case, holding edges 5 formed on the profiles 3 each engage in an associated recess 6 of the edge section of the sealing sheet 1 inserted into the relevant receiving groove in order to ensure a sufficiently firm hold with respect to the mechanical loads. Well recognizable, moreover, each formed on the thickened, profiled edge portion 2 Sealing lip 7 which rests against the inner wall of the associated receiving groove 4 and this divided into a plurality of defined chambers, namely an upper cavity 8 and a lower cavity 9.

Fig. 2 illustrates how in applying a preferred embodiment of the invention in the built-in expansion joint bridging device with minimal effort, in particular without replacement of the geomembrane, the tightness of the connection of the geomembrane 1 to the two profiles 3 can be effectively improved. Namely, at the required intervals, the screws 10 with which the tooth profiles 11 are screwed to the profiles 3 are removed. Instead, lubricating nipples 12 are screwed into the profiles 3. Through the lubricating nipple 12 and the threaded holes 13 of the profiles 3 through an existing of an acrylate resin sealing medium 14 is introduced into the upper cavity 8. The respective threaded holes 13 thus act as injection channels 15, which open into the cavity 8, which forms a defined sealing cavity 16 in this way. Subsequently, the lubricating nipple 12 are removed again and the screws 10 are screwed back into the threaded bores 13. The number of grease nipples used and the distance between them depends on the flow properties of the sealing medium 14.

In the Fig. 3 The modification shown illustrates the introduction of the sealing medium 14 in the sealing cavity 16 in a corresponding manner with removed tooth profiles 11 by the directly attached to the profiles 3 grease nipple 12th

If the profiles 3 are also known, differently constructed expansion joints bridging devices, because no tooth profiles are screwed to them, not already factory-installed tapped holes, then such in the case of taking place in accordance with the present invention rehabilitation of a corresponding, already installed expansion joint Make bridging device locally by drilling and tapping. For the further measures, the above explanations apply accordingly.

With built-in expansion joint bridging devices in the Fig. 1 to 3 As shown, the injection channels, as shown, typically accessible from above. In contrast, as shown in Fig. 4 is shown, in a factory, ie before the installation takes place sealing the expansion joint bridging device in application of the present invention, the injection channels 17 from the (later) underside accessible and in particular in the lower cavities 9, which form sealing cavities 18 in this way, lead. In this case, specially threaded holes 19, in which lubricating nipple 12 can be screwed, in such a way in which the respective receiving groove 4 downwardly limiting web 20 introduced that they open into the lower cavity 9; A practicable alternative is the turning of appropriately prepared grease nipples into smooth bores. Namely, in an embodiment of the thickened profiled edge portions 2 of the geomembrane 1, as shown in the Fig. 1 to 4 is shown, can achieve optimal sealing results in this way; because at a correspondingly high injection pressure lifts in the Sealing cavity 18 introduced sealing medium 14, the sealing lip 7 and also enters the sealing cavity 16 a.

Fig. 5 shows a known as such, typical multicellular (here five-cell) expansion joint bridging device (lamella-lane transition), in which four lamellae 21 are supported on trusses 22. Both the slats 21 and the edge profiles 23 represent profiles 3 in the sense of the present invention, on which sealing sheets 1, each bridge a Dehnfugenspalt D or cover this, are fixed with their thickened, profiled edge portions 2. In view of the fact that corresponding multicellular expansion joint bridging devices are well known, inter alia by documents cited at the beginning of the prior art, the disclosure content of which is expressly incorporated by reference into the subject matter of the present patent application Fig. 5 omitted construction.

In a built-in expansion joint bridging device of in Fig. 5 In order to improve the tightness of the connection of the sealing sheets 1 to the profiles 3, the present invention can be used, for example, in the present invention Fig. 6 Apply illustrated way. First, in the receiving groove 4 downwardly delimiting web 24 of the lamellae 21 and the edge profiles 23 - introduced by drilling and tapping - a threaded bore 25 in the existing within the receiving groove 4, from the inner wall and the outer surface of the edge portion of the second the geomembrane 1 limited lower cavity 26 opens. The manufacture of the threaded hole can through the lower Ridge 27 of the relevant lamella, ie by a passing through this auxiliary bore 28 through.

In the threaded hole 25, a grease nipple 12 is then screwed. The threaded hole constitutes an injection channel 29 for sealing medium 31 to be introduced through the lubricating nipple 12 into the lower cavity 26, which in this way forms a sealing cavity 30. In this respect, the above explanations, which are referred to to avoid repetition, apply correspondingly ,

The auxiliary bore 28 is closed after completion of the renovation work on the expansion joint bridging device and protected against corrosion.

Claims (18)

Expansion joint bridging device comprising two relatively movable profiles (3) with a width-adjustable expansion joint gap (D) arranged therebetween, over which extends a deformable sealing web (1) which is fixed peripherally to the two profiles, wherein the sealing web thickened profiled edge portions (2), each of which is positively received in an associated receiving groove (4) of the respective profile, characterized
in that cavities (8, 9) which are delimited in the receiving grooves (4) by these and the respective edge portions (2) of the sealing web (1) are filled with a subsequently introduced sealing medium (14, 31). Expansion joint bridging device according to claim 1, characterized in that each profile (3) has at least one injection channel (15, 17, 29) which opens into the associated receiving groove (4). Expansion joint bridging device according to claim 2, characterized in that the profiles (3) each have a plurality of injection channels (15, 17, 29) distributed along their extension. Expansion joint bridging device according to claim 2 or claim 3, characterized in that the at least one injection channel (15) is accessible from above. Expansion joint bridging device according to claim 2 or claim 3, characterized in that the at least one injection channel (17, 29) is accessible from below. Expansion joint bridging device according to claim 5, characterized in that the at least one injection channel (15, 17, 29) is closed by means of a reflux-blocking nipple. Expansion joint bridging device according to one of claims 1 to 6, characterized in that the cavity (8, 9) bounded by a by the inner wall of the receiving groove (4) and the outer surface of the received therein edge portion (2) of the geomembrane (1), formed in the longitudinal direction of the respective edge portion extending defined sealing cavity (16, 18, 30) is formed. Expansion joint bridging device according to claim 7, characterized in that in each of the receiving grooves (4) a plurality of sealing cavities (16, 18, 30) are arranged. Expansion joint bridging device according to claim 8, characterized in that within a receiving groove (4) arranged sealing cavities (16, 18, 30) by a sealing lip (7) of the associated edge portion (2) of the geomembrane (1) are delimited from each other. Expansion joint bridging device according to claim 8, characterized in that within a receiving groove (4) arranged sealing cavities (16, 18, 30) are delimited from each other by a formed on the inner wall of the receiving groove sealing rib. Expansion joint bridging device according to claims 2 and 7, characterized in that the injection channel (15, 17, 29) in the defined sealing cavity (16, 18, 30) opens and this through the injection channel filled with the sealing medium (14, 31) is. Expansion joint bridging device according to one of claims 1 to 11, characterized in that the sealing medium (14, 31) is water swellable. Expansion joint bridging device according to one of claims 1 to 12, characterized in that the sealing medium (14, 31) consists of a two-component sealing medium whose viscosity increases after introduction into the cavity. Expansion joint bridging device according to claim 13, characterized in that the two-component sealing medium consists of a polyurethane resin. Expansion joint bridging device according to claim 13, characterized in that the two-component sealing medium forms a hydrogel in the fully reacted state. Expansion joint bridging device according to claim 15, characterized in that the two-component sealing medium consists of an acrylate resin. Expansion joint bridging device according to one of claims 13 to 16, characterized in that the two-component sealing medium has a processing viscosity at 25 ° C of less than 180mPas, preferably a processing viscosity at 20 ° C of less than 5mPas. A method of rehabilitating an existing expansion joint bridging device comprising two relatively movable profiles (3) with a width-adjustable expansion joint gap (D) between them, over which extends a deformable sealing sheet (1) fixed peripherally to the two profiles , wherein the sealing sheet has thickened profiled edge sections (2), which are each received in a form-fitting manner in an associated receiving groove (4) of the cavities (8, 9) existing in the receiving grooves and bounded by the edge section of the sealing strip ) are filled with a subsequently introduced therein sealing medium (14, 31).

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