Expansion joint bridging device

Abstract

An expansion joint bridging device which bridges an expansion joint between two construction work parts of a traversable construction work. The expansion joint is spanned by at least two crossbeams which are supported in a load-bearing manner on both construction work parts, wherein at least one of the load-bearing supports allows a displacement movement. An overload safety device comprises two supporting profiles at a distance from one another and supported on the crossbeams, and a fill profile bridging the gap between the support profiles. If a threshold value for the force that would effect the two support profiles to approach one another is exceeded, a fixing device releases the positional stabilization such that the two support profiles can be moved towards one another by displacing the fill profile upwards out of the gap.

Claims

1. An expansion-gap bridging device (1) in the form of a multi-plate roadway expansion joint (2), which bridges over an expansion gap (4), which is disposed between two structure parts (3) of a traffic-carrying structure, wherein: the expansion gap (4) is spanned by at least two crossbeams (5), which are braced in load-bearing relationship on two structure parts (3), wherein at least one of the load-bearing bracing points (6) permits a displacement movement of the respective crossbeam (5) relative to the structure part (3) in question; several chord plates (11) disposed above the crossbeams (5) and oriented at least substantially parallel to one another are braced on the crossbeams (5) in such a way that they can be displaced relative to the crossbeams (5) as well as relative to one another; an overload-safety device (17) is provided between two of the chord plates (11) that can be displaced relative to the crossbeam (5) as well as relative to one another; the overload-safety device (17) comprises two bracing profiles (18) spaced apart from one another and braced on the crossbeams (5) as well as one filler profile (32) bridging the gap (S) between the bracing profiles (18); at least one fixation device (31, 49) that clamps the position of the two bracing profiles (18) relative to one another acts between the two bracing profiles; when the force acting in the sense of approach of the two bracing profiles (18) toward one another exceeds a threshold value, the fixation device (31, 49) acts to release the position clamp in such a way that the two bracing profiles (18) can be moved toward one another while forcing the filler profile (32) upward out of the gap (S).

2. The expansion-gap bridging device (1) of claim 1, wherein the filler profile (32) is part of the fixation device (31).

3. The expansion-gap bridging device (1) of claim 1, wherein the filler profile (32) is joined to the bracing profiles (18) by means of fastening elements (31) with predetermined breaking load.

4. The expansion-gap bridging device (1) of claim 1, wherein the filler profile (32) rests with peripheral regions (59) on bracing regions (29) of the bracing profiles (18).

5. The expansion-gap bridging device (1) of claim 4, wherein a sealing gasket (58) is provided for the peripheral regions (59) of the filler profile (32) on the bracing regions (29) of the bracing profiles (18).

6. The expansion-gap bridging device (1) of claim 1, wherein sliding chamfers (23, 36, 37, 38) are provided on the filler profile (32) or the bracing profiles (18), in order to favor raising of the filler profile (32) when the bracing profiles (18) move toward one another.

7. The expansion-gap bridging device (1) of claim 1, wherein the filler profile (32) rests on the crossbeams (5).

8. The expansion-gap bridging device (1) of claim 7, wherein the filler profile (32) is clamped against the crossbeams (5) by means of fastening elements (31) with predetermined breaking load.

9. The expansion-gap bridging device (1) of claim 7, wherein frames (57) that embrace the crossbeams (5) and are equipped with a sliding spring (58) in order to clamp the filler profile (32) against the crossbeams (5) as well as at least one fastening element (60) with predetermined breaking load are assigned to the filler profile (32).

10. The expansion-gap bridging device (1) of claim 1, wherein the overload-safety device (17) is provided between substantially equally many chord plates (11).

11. The expansion-gap bridging device (1) of claim 1, wherein the bracing profiles (18) or the filler profile (32) have a traffic-carrying surface (13).

12. The expansion-gap bridging device (1) of claim 1, wherein the bracing profiles (18) are sealed against adjacent chord plates (11) by means of deformable sealing strips (12).

13. The expansion-gap bridging device (1) of claim 1, wherein both ends of the crossbeams (5) are braced in load-bearing and displaceable relationship on the structure parts (3).

14. The expansion-gap bridging device (1) of claim 1, wherein the crossbeams (5) project at both ends into crossbeam boxes (10).

15. The expansion-gap bridging device (1) of claim 1, wherein a plurality of functionally equivalent overload-safety devices (17) is provided.

16. The expansion-gap bridging device (1) of claim 1, wherein an anti-lift safeguard (43) acts between the bracing profiles (18) and the crossbeams (5).

17. The expansion-gap bridging device (1) of claim 16, wherein frames (43) that embrace the crossbeams (5) are assigned to the bracing profiles (18).

18. The expansion-gap bridging device (1) of claim 16, wherein spacer elements (48) that are disposed underneath the crossbeams (5) and are joined to the frames (43) by means of fastening elements (49) with predetermined breaking load are provided between the frames (43) of the two bracing profiles (18).

19. The expansion-gap bridging device (1) of claim 16, wherein respectively at least one sliding spring (51) is disposed within the frames (43) for clamping the bracing profiles against the crossbeams.

20. An expansion-gap bridging device (1) in the form of a multi-plate roadway expansion joint (2), which bridges over an expansion gap (4), which is disposed between two structure parts (3) of a traffic-carrying structure, wherein: the expansion gap (4) is spanned by at least two crossbeams (5), which are braced in load-bearing relationship on two structure parts (3), wherein at least one of the load-bearing bracing points (6) permits a displacement movement of the respective crossbeam (5) relative to the structure part (3) in question; one chord plate (11) disposed above the crossbeams (5) is braced on the crossbeams (5) in such a way that it can be displaced relative to the crossbeams (5); one overload-safety device (17), which is not firmly joined to any of the structure parts (3), is provided in a relationship at least substantially parallel to the chord plate (11); the overload-safety device (17) comprises two bracing profiles (18) spaced apart from one another and braced on the crossbeams (5) as well as one filler profile (32) bridging the gap (S) between the bracing profiles (18); at least one fixation device (31, 49) that clamps the position of the two bracing profiles (18) relative to one another acts between the two bracing profiles; when the force acting in the sense of approach of the two bracing profiles (18) toward one another exceeds a threshold value, the fixation device (31, 49) acts to release the position clamp in such a way that the two bracing profiles (18) can be moved toward one another while forcing the filler profile (32) upward out of the gap (S).

21. An expansion-gap bridging device (1) in the form of an overload-safety device (17), which bridges over an expansion gap (4), which is disposed between two structure parts (3) of a traffic-carrying structure, with the following features: the expansion gap (4) is spanned by at least two crossbeams (5), which are braced in load-bearing relationship on two structure parts (3), wherein at least one of the load-bearing bracing points (6) permits a displacement movement of the respective crossbeam (5) relative to the structure part (3) in question; the overload-safety device (17), which is not firmly joined to any of the structure parts (3), comprises two bracing profiles (18) spaced apart from one another and braced on the crossbeams (5) as well as one filler profile (32) bridging the gap (S) between the bracing profiles (18); at least one fixation device (31, 49) that clamps the position of the two bracing profiles (18) relative to one another acts between the two bracing profiles; when the force acting in the sense of approach of the two bracing profiles (18) toward one another exceeds a threshold value, the fixation device (31, 49) acts to release the position clamp in such a way that the two bracing profiles (18) can be moved toward one another while forcing the filler profile (32) upward out of the gap (S).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) An exemplary embodiment of the invention is explained in more detail hereinafter on the basis of the drawing, wherein:

(2) FIG. 1 shows a section parallel to the direction of the crossbeams through an expansion-gap bridging system constructed according to the invention,

(3) FIG. 2 shows an enlarged diagram of the overload-safety device and of the chord plates adjoining it according to detail B of FIG. 1,

(4) FIG. 3 shows a cross-sectional view of the crossbeam and of the bracing-profile bearing according to section A-A through the overload-safety device of FIG. 1,

(5) FIG. 4 shows a perspective section corresponding to FIG. 1 through the expansion-gap bridging device of FIG. 1 with released overload-protection device in planned almost minimum spacing of the bracing profiles relative to one another,

(6) FIG. 5 shows a section parallel to the direction of the crossbeams through an expansion-gap bridging device constructed according to the invention without chord plates,

(7) FIG. 6 shows a section parallel to the direction of the crossbeams through an expansion-gap bridging device constructed according to the invention with one single chord plate,

(8) FIG. 7 shows a section parallel to the direction of the crossbeams through an embodiment of an expansion-gap bridging device constructed according to the invention with a frame associated with the filler profile,

(9) FIG. 8 shows a cross-sectional view of the crossbeam and of the filler-profile bearing according to section C-C through the overload-safety device of FIG. 7.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(10) FIG. 1 shows the practical example of an inventive expansion-gap bridging device 1 with a multi-plate roadway expansion joint 2, which is disposed between two bridge parts 3 for bridging over an expansion gap 4.

(11) Several crossbeams 5, of which one is shown in FIG. 1, bridge over expansion gap 4 and are respectively mounted in two crossbeam bearings 6, which are fastened on two columns 8 of bridge parts 3 such that they can slide in longitudinal direction L. The two crossbeam ends 9 project into crossbeam boxes 10 of bridge parts 3.

(12) Several chord plates 11 are braced on crossbeams 5. Chord plates 11 disposed parallel to one another are mounted on crossbeams 5 such that they can slide in longitudinal direction L. Between two chord plates 11 and joined thereto there is respectively disposed an elastic sealing strip 12 for protection, especially from moisture and dirt, of expansion-gap bridging device 1 underneath roadway plane 13, on which a roadway pavement suitable for vehicular traffic is preferably disposed in the sense of a traffic-carrying surface. The upper sides 14 of the chord plates coincide in height with roadway plane 13. Sliding chord-plate bearings 15 embrace the crosspieces in the manner of frames, wherein slide blocks are disposed respectively at the top between the frames of chord-plate bearing 15 and crossbeam 5 and respectively at the bottom between the frames of chord-plate bearing 15 and crossbeam 5. Chord plates 11 can be joined to one another (in the sense of spacing control) via mechanical spacing regulators, not illustrated, by which the displacement behavior of chord plates 11 relative to one another can be controlled in the presence of a force acting in longitudinal direction L. The movement of the respective left and right outermost chord plates 11 is limited at one end in longitudinal direction L by the peripheral profiles (projections 16) of bridge parts 3 as well as by spacers 7 (which cooperate as stops with the lower portions of the frames of chord-plate bearings 15).

(13) To this extent, the expansion-gap bridging device relies on the sufficiently known prior art, and so further explanations are not needed either with respect to the construction or with respect to the function according to the intended use (compensation of thermal expansions or contractions of bridge parts 3 by variation of the spacings between chord plates 11 mounted displaceably on the crossbeams) in the design or working range.

(14) An overload-safety device 17 is disposed between the total of 16 chord plates 11 on the left side and 17 chord plates 11 on the right side, and the openings between overload-safety device 17 and chord plates 11 adjoining it are closed by sealing strips 12.

(15) From enlarged detail B of FIG. 1 illustrated in FIG. 2, it can be seen particularly well that overload-safety device 17displaceable in longitudinal direction Lhas two bracing profiles 18 spaced apart from one another in longitudinal direction L and one filler profile 32 disposed between these and bridging over gap S between the two bracing profiles 18. In the normal operating situation, a fixation device acts to clamp the position of these parts relative to one another. The two bracing profiles 18, in a certain static resemblance to chord plates 11, respectively comprise a profile head 19, a profile foot 20 and a profile web 21 welded together with both, while additional stiffening elements 22 welded to the said three parts of the bracing profiles are provided with respectively an obliquely oriented stiffening side face 23. Bracing-profile bearings, which are joined via a pair of first bolted joints 26 to profile feet 20 and in particular comprise respectively two slide blocks 25 capable of sliding in longitudinal direction L of crossbeam 5, are joined to each bracing profile 18 (described hereinafter) at the respective profile-foot underside 24.

(16) Profile heads 19 have hooks 27 extending in the direction of the adjacent chord plates 11. Guide elements 28 extending in the same direction are firmly joined to profile-head top sides 29 of profile heads 19 (which are substantially rectangular). Sealing strips 12 are firmly clamped at their peripheries in corresponding hollow spaces between hooks 27 and guide elements 28. All chord plates 11 have clamping devices 30 and hooks 27 similar to upper guide elements 28, whereby sealing strips 12 can be clamped both between two chord plates 11 and between chord plates 11 and bracing profiles 18.

(17) Filler profile 32 has a plate 33 as well as a base 34 joined thereto. Outer left and right peripheral zones 59 of plate 33 of filler profile 32 rest on profile-head top sides 29 of profile heads 19 forming the bracing areas, while bracing profiles 18 are sealed from plate 33 of filler profile 32 by means of sealing gaskets 58. Profile heads 19 of bracing profiles 18 are fastened to filler profile 32 by a pair of second bolted joints 31, which constitute a component of the upper of two parts of the fixation device and are constructed as bolted joints with predetermined breaking load. Plate top side 35 of plate 33 is oriented at the same height as roadway level 13. Obliquely oriented plate side faces 36 of plate 33 bear against corresponding oblique guides 37 of guide elements 28. Base 34 of filler profile 32 comprises a web, a filler-profile foot 40 and stiffeners welded to these parts as well as to plate 33, wherein the latter have obliquely oriented base sides 38 converging in downward direction. A filler-profile bearing 41, which rests without clearance on crossbeam 5 but can slide along it in longitudinal direction L and is identical to slide blocks 25, bears against filler-profile foot 40. Second bolted joints 31 are tightened sufficiently that filler profile 32 is clamped by means of filler profile bearing 41 against crossbeams 5. Filler-profile bearing 41 is respectively joined firmly to filler-profile foot 40 of base 34 by a pair of third bolted joints 42.

(18) FIG. 3 shows, in a sectional diagram according to section A-A of FIG. 1, especially the bracing-profile bearing, which in its basic structure is similar to partly visible chord-plate bearings 15. Profile foot 20 of bracing profile 18 is firmly joined to a frame 43, which embraces crossbeam 5 and in the manner of an anti-lift device prevents bracing profile 18 from undesired movement upward in vertical direction H. Frame 43 has two elongated side parts 44 as well as flanges 45, which are firmly joined thereto and are also firmly joined to profile foot 20 via first bolted joints 26. At the top, frame 43 is closed by bearing plate 46 disposed between flanges 45 and profile foot 20. At the bottom, the two associated slide blocks 25, which rest on upper crossbeam flange 52 such that they can slide on it, are disposed on bearing plate 46. Side parts 44 are joined firmly to bottom part 47 in the region of their lower ends. A spacer element 48 of T-shaped cross section, which is oriented underneath crossbeam 5 and forms the lower of the two parts of the fixation device, is joined to frames 43 associated with the two bracing profiles 18, by the fact that it is fastened respectively to bottom part 47 of frame 43 via a pair of fourth bolted joints 49. These fourth bolted joints represent bolted joints with predetermined breaking load. A spring bearing having the form of two sliding springs 51 spaced apart in longitudinal direction L and capable of sliding resiliently in vertical direction H is disposed between bottom part 47 and lower crossbeam flange 50.

(19) The function of expansion-gap bridging device 1 in the case that a movement of the two bridge parts 3 toward one another exceeds the normal design operation or working range can be described as follows:

(20) If, because of an earthquake or other seismic event, for example, the two bridge parts 3 move toward one another in longitudinal direction of the crossbeams by an amount greater than would correspond to the design minimum spacingdefined by which by definition occurs when chord plates 11 are bearing against another against bracing profiles 19 of overload-safety device 17overload-safety device 17 comes into play for more extensive compensation of the change of position, specifically until bracing profiles 18 approach one another as closely as possible, as illustrated in FIG. 4.

(21) Via chord plates 11, which are bearing against one another in the form of a block, displacement forces acting in mutually opposite directions are transmitted to bracing profiles 18 themselves by bridge parts 3 via bracing profiles 18 of chord plates 11 adjacent to overload-safety device 17. The displacement forces are guided into the upper and lower part of the fixation device, which at first defines the spacing of bracing profiles 18 relative to one another. If a specified threshold value is exceeded, second bolted joints 31 (associated with plate 33 of the filler profile) and fourth bolted joints 49 (associated with spacing element 48), which represent joining elements of the fixation device with predetermined breaking load, are sheared. Hereby the position clamp of bracing profiles 18 is released and these are able to move toward one another. If bracing profiles 18 move toward one another, plate 33 with its obliquely oriented plate side faces 36 slides along oblique guides 37 of guide elements 28, and filler profile 32 moves upward in vertical direction H.

(22) When bracing profiles 18 have moved so far toward one another that obliquely oriented base sides 38 are bearing against upper head edges 55, facing one another, of profile heads 19, obliquely oriented base sides 38 are able to slide along head edges 55 and move filler profile 32 further upward in vertical direction H. This sliding movement is possible until base edges 56 disposed at the ends of base sides 38 have reached the height of head edges 55. A slight further approach of the two bracing profiles 18 accompanied by upward movement of filler profile 32 is still possible even then, by the fact that filler profile bearing 41 slides on stiffening side faces 23. This movement is possible as long as the sides of profile feet 20 and slide blocks 25 facing one another are bearing against one another, since in this position of profile-foot 40 space exists between profile heads 19 of the two bracing profiles 18. The minimum expansion of expansion-gap bridging device 1 is reached in this position of bracing profiles 18.

(23) Expansion-gap bridging device 1 illustrated in FIGS. 5 and 6 has no chord plates (FIG. 5) or one single chord plate 11 (FIG. 6). Bracing profiles 18 and filler profile 32 of overload-safety device 17 are braced on crossbeams 5. In expansion-gap bridging device 1 shown in FIG. 5, the two gaps between overload-safety device 17 and the two projections 16 of bridge parts 3 are closed by two sealing strips 12, which of course are not designed to absorb forces, especially in longitudinal direction L of crossbeam 5. In expansion-gap bridging device 1 shown in FIG. 6, the gap between right projection 16 of right bridge part 3 and overload-safety device 17 is closed by a sealing strip 12 with the aforesaid properties. The gap between left projection 16 of left bridge part 3 and overload-safety device 17 is closed by the single chord plate 11 and two sealing strips 12 with the aforesaid properties.

(24) FIGS. 7 and 8 show an embodiment of overload-safety device 17 explained in the foregoing with bolted joints 60 functioning as fastening elements with predetermined breaking load on frames 57, which are bolted to filler profile 32 and completely embrace crossbeams 5. Frames 57 of filler profile 32 have the same elements as frames 43 of bracing profiles 18. Sliding spring 58 exerts a spring force on lower crossbeam flange 61 and bottom parts 62 of frame 57, whereby filler profiles 32 are clamped by means of filler profile bearings 41 against crossbeams 5.