EP0311015B1 - Guard barrier structure - Google Patents

Abstract

The barrier structure consists of releasably assembled single parts which are manufactured as prefabricated parts and can be placed on the traffic surface. These single parts consist of a sliding pedestal (2) and at least one steel crash barrier (3) which is at a distance from said pedestal, is connected by means of posts (8) or the like and is anchored at its free ends in the traffic area, the sliding pedestal (2) has at least one tensioning strip (14, 15) which is arranged on the side facing away from the road and can be connected in a non- positive manner to the tensioning strips of the adjacent sliding pedestals, the free ends of the continuous tensioning strip being anchored in the traffic area. <IMAGE>

Description

Guardrail device, consisting of detachably assembled, attachable to the traffic area and manufactured as finished parts, each consisting of a sliding cross-section provided with a full cross-section and at least one spaced upwards from this, via approximately vertical posts or the like. connected and with their free ends anchored in the traffic area, having a tension band effect steel guardrail.

Such a guardrail device is known from DE-A-30 36 227; in this device, the bell-shaped sliding threshold is composed of steel plates, the two side plates being connected by a continuous cover plate. This creates a substantially rigid hollow body, the outer surfaces of which are designed so that impacting vehicles run up on the sliding threshold and are deflected by the steel crash barrier. The non-positive connection of the steel crash barrier as well as the formation of the bell-shaped sliding threshold in cross section and their connection to one another leads to a tension band effect in the event of a vehicle impact. The desired effect that on the one hand in particular lighter vehicles, such as passenger cars, cannot exploit this drawstring effect because they first drive their wheels up the sliding threshold and only then are deflected by the spars of the steel guardrail, because the expansion effect of the Sliding threshold made of steel differs very significantly from the tension band effect of the steel guardrail. The effect of this known guardrail device in the case of heavy vehicles that might hit, such as trucks, on the other hand, it is different in that, in the event of an impact, the entire guardrail device is moved parallel to the top of the traffic surface and thus the tension band effect of the steel guardrail comes into effect.

The different reaction of the sliding threshold and the spars of the steel guardrail does not always ensure that the sliding threshold under the steel guardrail is not pushed away or that lighter vehicles are not thrown back into the road.

The invention has for its object to transfer the tension band effect of the steel guardrail or of its spars to the sliding threshold so that regardless of the possible impact force and its force application point is guaranteed with certainty that the sliding threshold bends together with the steel guardrail on impact and thus evades parallel to the top of the road.

This object is achieved in that the slide tie has at least one with regard to the vertical plane determined by the steel crash barrier, spaced from the outer wall of the slide tie, so that the tension band effect of the slide and steel crash barrier are adapted to each other, the tension band embedded in the full cross-section of the sleeper and can be coupled to the tension bands of the neighboring sleeper, preferably non-positively connected, and the free ends of the continuous tension band of the crash barrier device are anchored in the traffic area. While there are thus two drawstrings that are similar in their effect, the sliding sleeper body essentially serves to prevent undesired additional vehicle damage from the lower drawstring on the one hand and to largely protect the driver from injuries on the other hand.

At least one tension band arranged on the side facing away from the carriageway can be arranged in or on the sliding threshold above the center of gravity.

Taking into account the fact that the resulting force in the event of an impact is approximately at the height of the wheel axles of the individual vehicles, it must therefore be taken into account that this resulting force is approximately 30-40 cm above the road surface in a passenger car and approximately 50-70 cm above the road surface on a truck. Irrespective of the fact that the resultant of these forces has a different effect on the protective barrier device, the magnitude of these forces can also be very different. Nevertheless, it should be ensured that the tension band effect of the sliding threshold on the one hand and the steel guardrail on the other hand leads to bulging of the guardrail device parallel to the roadway. Corresponding tests have shown that in the case of a passenger car with an impact angle of approximately 15 °, the guardrail device bends by approximately 60-80 cm, while at the same impact angle a truck causes a deflection of 90 cm to over 1.20 m. The tests have also confirmed that, on the one hand, the double tension band effect _ adjusted to each other _ is sufficient to prevent the guardrail device from breaking or being driven over.

Guardrail devices according to the invention are used at the edges of a carriageway or usually between two carriageways, e.g. during construction site operation. In this case, two drawstrings are expediently provided in cross section in mirror image.

As already noted, the effect of the lower tension band is taking into account the profile and the mass of the sliding threshold to consider. In this context, it should be pointed out that slidable individual parts, which simply because of their weight _ eg consisting of a solid concrete body _ cannot replace the described tension band effect of the sliding threshold according to the invention, unless they also with a corresponding continuous tension band, which is also anchored at both free ends.

Accordingly, the slide rail is expediently designed as a hollow body or solid. For the drawstring, e.g. a metal plate, a metal band, at least one rope, a metal rod or the like. in question. The slide rail can be made of concrete or lightweight concrete, e.g. Gas concrete or polystyrene concrete, wood, plastic composite material, aluminum, recycling material e.g. of vehicle tires.

The posts or the like. the steel guardrail are expediently or the like on a plate which can be fastened in each case on the end face of the sliding threshold. appropriate; the plate or the like is expediently on a plate attached in or on the sliding threshold, which is held with tie rods in the sliding threshold; the tie rods can be firmly connected to the tie, e.g. be worn out.

According to a preferred embodiment of the invention, the frictional connection of the tension band with the neighboring tension band is carried out by means of bolts, threaded spindles or the like; In this context it should be mentioned that a connection free of play is sought.

Preferred catfish is provided at one end with a perpendicular recess, for example in a wedge shape, and at the other end with a corresponding projection. Even if there is a direct connection between the sliding thresholds _ with one exception of the drawstrings is of course not necessary, the adjustment of the free ends of the individual finished parts just described can bring about a common displacement of the interconnected sliding sleeper bodies.

Sliding feet are preferably provided on the underside of the sliding sleeper, the ones running parallel to the sliding sleeper axis. free edges are rounded.

The aim of this is to ensure that the slide threshold does not tilt slightly in the event of a vehicle impact and that its tilting edge sticks to the roadway, so that a avoidance of the slide threshold parallel to the roadway would be prevented.

• Fig. 1 in schematisierter Darstellrung eine Längsansicht auf ein Ende einer erfindungsgemäßen Schutzplankeneinrichtung,
• Fig. 2 einen Querschnitt durch eine Ausführungsform der Erfindung,
• Fig. 3 eine Draufsicht auf die gleiche Ausführungsform,
• Fig. 4 eine Seitenansicht auf die Ausführungsform,
• Fig. 5 ein Detail einer abgewandelten Ausführungsform,
• Fig. 6 eine Fig. 3 ähnliche Draufsicht auf eine abgewandelte Ausführungsform,
• Fig. 7 ein Detail einer Verbindung von Zugbändern,
• Fig. 8 ein abgewandeltes Detail einer ähnlichen Verbindung,
• Fig. 9 einen Querschnitt durch eine abgewandelte Ausführungsform und
• Fig. 10 einen Querschnitt durch eine weitere Ausführungsform.

For example, embodiments of the invention are shown on the drawing; they are described in more detail below. It shows:

• 1 is a schematic representation of a longitudinal view of one end of a guardrail device according to the invention,
• 2 shows a cross section through an embodiment of the invention,
• 3 is a top view of the same embodiment;
• 4 is a side view of the embodiment,
• 5 shows a detail of a modified embodiment,
• 6 is a plan view similar to FIG. 3 of a modified embodiment,
• 7 shows a detail of a connection of drawstrings,
• 8 shows a modified detail of a similar connection,
• Fig. 9 shows a cross section through a modified embodiment and
• Fig. 10 shows a cross section through a further embodiment.

A guardrail device 1, which is provisionally between two lanes _ e.g. used in the construction site area _, consists of a sliding threshold 2 and a continuous steel guardrail 3. This steel guardrail 3 is designed to the left of the drawing in the usual way and e.g. connected via post 4 to the ground or the edge of the traffic area or the carriageway. At the transition point to site operation, i.e. that is, a small distance between the two opposite carriageways, a transition piece 5 of a sliding threshold is used. This transition piece is firmly connected to the ground or to the top of the carriageway and also supports the ends of the drawstrings described below via an anchor 6. The approximately triangular end piece 5 in longitudinal section supports the steel guardrail 3 via posts 7, 8, which is thus designed as a continuous band and triggers the aforementioned tension band effect. A standardized prefabricated part 9 connects to the end piece 5 and is described in more detail below.

Such a finished part is e.g. shown in Fig. 2 in the cross section.

The steel guardrail 3 is connected to the sliding threshold by means of posts 8. Each post 8 has a base plate 10, which is in turn connected to a plate 11 provided on the end face of the sliding sleeper, for example with four screw bolts.

These bolts 11 can optionally be extended by tie rods 12, 13 approximately parallel to the side surfaces of the sliding sill.

Tension rods 14, 15, 16 and 17 run in the longitudinal direction of each prefabricated part, which, as described in more detail below, are connected to the corresponding tension rods of the neighboring prefabricated parts in a manner that is as force-fit as possible.

All four tension rods are subjected to a train impact, be it from one side of the road or from the other side of the road to train, the entire guardrail device being displaced on sliding feet 18, 19 parallel to the upper edge of the road. The known tension band effect of the steel guardrail is thus also used in a similar form by the sliding threshold, although the dead weight of the sliding threshold must also be taken into account. The sliding threshold itself is designed as a solid body and consists e.g. made of polystyrene concrete. However, e.g. so-called Recycled vehicle tires are used, although the sliding threshold may be covered with thin plates on the side walls.

As shown in Fig. 3, one end of the sill is provided with a recess 20, while the other end has a corresponding projection, so that the finished parts can be easily pushed into one another and do not deflect individually in a side impact.

The individual tension rods 14-17 have connection options at the joint between two finished parts, as described below in connection with FIGS. 7 and 8, for example. To make these connections from the outside, recesses 21 are provided in the area of the free ends of the tension rods in the sliding sleeper, so that a screw connection or non-positive connection between the ends of the tension strip of one prefabricated part and the ends of the tension strip of the neighboring finished part can be produced from the outside. These connections are detachable so that the individual finished parts can be reused.

The individual finished parts can be lengths of 2 m or e.g. Have 4 m; the seams of the sliding sleeper should not in principle coincide with the seams of the steel plank, but an offset connection from sliding sleeper to sliding sleeper and steel guardrail to steel guardrail is aimed for.

As can be seen from FIG. 5, the sliding feet of the sliding sleeper 2 can also be made continuous across the longitudinal axis of the sliding sleeper, the edges 22 and 23 being rounded. This is to prevent a sharp edge of the sliding feet from "clinging" to the ground after a vehicle impact when the guardrail device is moved and thus possibly lead to a tilting movement; this should be avoided in any case.

As already explained above, in the event of a slight vehicle impact, the crash barrier device can deflect 40-50 cm, preventing the vehicle from being thrown back into the carriageway, while evasion of up to 1.20 m or more is possible in the event of a hard impact.

Instead of the tension rods described, steel strips or steel cables can of course also be used; However, it must be ensured that the connection of the tension bands in the area of the sliding threshold is so tight that the tension band as a continuous band in the event of an impact works and is not torn out of the end anchorages.

According to the embodiment according to FIGS. 6 and 8, steel strips 30-32 are provided, which are accommodated upright in the respective sliding sleepers 2, so that their broad sides are perpendicular to the upper edge of the road.

A connection of such steel strips is shown, for example, in FIG. 8, with the sliding threshold again being provided with cutouts 21 in the connection area. While e.g. one end of a steel strip runs straight, the opposite end is bent, so that from finished part to finished part, e.g. Connections, as shown in Fig. 8 in plan view, are provided. The connection is expediently carried out via at least four screw bolts. However, more bolts can of course also be provided.

7 shows a modified type of connection in plan view. The individual tie rods 16 'are provided with end threads, which can be clamped together by a rotating spindle 35.

FIGS. 9 and 10 show cross sections of modified sliding sleepers, the steel crash barriers 3 each having the same structure as described above. It is obvious that in certain cases a mirror image of the steel guardrail and the sliding threshold is not required; this can e.g. in the case of provisional guardrail devices on the edge of a road.

9 each has two steel bars 41, 42, which are usually used in the steel guardrail; of course, the free ends of these steel bars 41 and 42 must each have the corresponding ends of the neighboring sliding threshold be firmly connected.

The sliding threshold 40 designed as a solid body can consist of any material; care must only be taken that this material causes as little damage to the body as possible in the event of a vehicle impact. As is known, the vehicle is plastically absorbed by the superimposed drawstring effect.

In the embodiment according to FIG. 10, the sliding threshold 45 is in turn provided with a steel bar 46 and 47, respectively. The plates 10, 11 of the post 8 are, however, connected to the foot plate 50 by long anchor rods 48, 49, so that a certain frame effect is created in cross section, the steel bars 46 and 47 not having to be connected to this frame. It is also possible that such frames are outside the area of the posts, i.e. in the smoothing threshold are provided, for example, at a distance of 70-80 cm, in which case the plate 11 is to be formed continuously, which also applies to the sliding feet 22.

Claims (12)

1. Protective board device, comprising detachably assembled individual parts, which may be placed on the traffic area and are produced as finished parts, which comprise in each case a slip threshold (2), provided with a full cross-section, and at least one steel deflection board (3) spaced above it, connected via approximately vertical posts (7, 8) or the like, and anchored in the traffic area with its free ends, having a draw tie effect, characterised in that the slip threshold (2; 40: 45) has at least one draw tie (14, 15, 16, 17; 41, 42) offset with regard to the vertical plane determined by the steel deflection board (3) and arranged at a distance from the outer wall of the slip threshold, so that the draw tie effect of the slip threshold (2) and the steel deflection board (3) are adapted to each other, where the draw tie is embedded in the full cross-section of the slip threshold and can be coupled, preferably connected non-positively, to the draw ties of the neighbouring slip threshold (2), and the free ends (5) of the continuous draw tie (14, 15, 16, 17: 41, 42) of the protective board device are anchored in the traffic area.

2. Protective board device in accordance with Claim 1, characterised in that at least one draw tie (15, 17; 41, 42), arranged on the side turned away from the roadway, is arranged in or on the slip threshold (2; 40, 45) above the mass centre of gravity.

3. Protective board device, which may be set up between two roadways, in accordance with Claim 1 or 2, characterised in that there are in each case two mirror-identical draw ties (14, 15; 16, 17) provided in the slip threshold.

4. Protective board device in accordance with one of Claims 1 to 3, characterised in that the draw tie comprises a metal plate (41, 42), a metal tie, at least one cable, a metal rod (14, 15; 16, 17).

5. Protective board device in accordance with one of Claims 1 to 3, characterised in that the slip threshold (21, 40, 45) comprises concrete or breeze concrete, such as aerated concrete or polystyrene concrete.

6. Protective board device in accordance with one of Claims 1 to 3, characterised in that the slip threshold (21, 40, 45) comprises wood, plastics, composite material, aluminium, recycling material, such as vehicle tyres.

7. Protective board device in accordance with one or more of Claims 1 to 3, characterised in that the side walls of the slip threshold comprise thin plates, and the slip threshold is filled with recycling material.

8. Protective board device in accordance with one of Claims 1 to 3, characterised in that the posts (7, 8), or the like, of the steel deflection board (3) or the steel deflection boards themselves are mounted on a plate (10), or the like, which may be secured on the end face of the slip threshold (2).

9. Protective board device in accordance with Claim 8, characterised in that the plate (10), or the like, lies upon a plate (11), mounted in or on the slip threshold (27; 40, 45) and held with tie rods (12, 13) in the slip threshold (27, 45).

10. Protective board device in accordance with Claim 9, characterised in that the tie rods (11, 12) are firmly connected, for example welded, to the draw tie (14, 15, 16, 17).

11. Protective board device in accordance with one of Claims 1 to 10, characterised in that the non-positive, positive, or material connection between the draw tie (14, 15, 16, 17) and the neighbouring draw tie is effected by means of screw bolts (16′), or the like.

12. Protective board device in accordance with one of Claims 1 to 11, characterised in that the slip threshold (21, 40, 45) is provided on one end with a groove (20) running vertically, for example in the shape of a wedge, and with a corresponding projecting part on the other end.

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