Dynamic stone chip protection barrier

Abstract

Dynamic stone chip protection barrier for protecting against stone chips or other natural occurrences, containing - a plurality of support carriers (3) which are each fastened to a floor anchor (4), - a mesh network (5) which is suspended between the support carriers (3), an upper network carrying cable (1) which runs along the upper edge of the mesh network (5) and which has in each case one contact point to the support carriers (3), a lower network carrier cable (11) which runs along the lower edge of the network (5) and which has in each case one contact point to the support carriers, and also - at least one central carrying cable (21), characterized by tension elements (6) which run substantially perpendicular to each central carrying cable (21) and which are fastened by way of their ends to the top and bottom of a support carrier (3), and which have a contact point to the individual carrying cable (21), which contact point allows displacement of each individual carrying cable (21) relative to the tensioning element (6).

Description

[0001] The invention relates to a dynamic protective barrier for protection against, in particular, rockfall and other natural hazards according to the preamble of claim 1. The preamble "rockfall protection barriers" encompasses various types of safety devices, such as those protecting against avalanches, machinery, icefall, debris flows, landslides, and the like. In dynamic rockfall protection barriers, loads are typically absorbed by the net and transferred via support cables to the supporting structure, its anchorage, and laterally mounted energy absorption elements (so-called braking elements), as well as to lateral anchorages.

[0002] Dynamic rockfall protection barriers according to the preamble of claim 1 are described in JP 2004 019369 A and KR 2012 0083874 A. In these known protection barriers, the tension elements, which run essentially perpendicular to the support cables, are arranged essentially centrally between adjacent support beams, so that in the event of a load, the support beams are subjected to increased buckling loads at the points where the support cables are attached. According to JP 2004 019369 A, the tension elements are clamped to the support cables by means of clamps.

[0003] According to EP 1 516 964, DE 10 2006 013 526, FR 2 414 586 A1 and JP 2014-058842 A, such protective barriers contain upper and lower net support cables which are guided or attached directly to the support beams or a support structure by means of brackets and have contact points with the support structure.

[0004] In JP 1995 7279126 A a rockfall protection fence is described, containing Posts (41) anchored in the ground, with eyelets attached to them, horizontal cables (42) running through the eyelets, vertically running chains (10) crossing the horizontal cables (42) and arranged between adjacent posts (41), eyelet-shaped fastening elements (30) with which the chains (10) are clamped to the upper horizontal cables (42), eyelet-shaped fastening elements (20) which are freely movable through the remaining horizontal cables (42).

[0005] There is no mesh netting. Due to the absence of a mesh netting, this known rockfall protection fence is only suitable for protection against large boulders that are larger than the distance between adjacent horizontal cables 42, which also explains why vertical chains are used instead of vertical cables as vertical elements crossing the horizontal cables to prevent an increase in the distance between adjacent horizontal cables.

[0006] In the rockfall protection barriers described in EP 1 911 884 A1 and EP 1 500 747 A1, in addition to the upper and lower net support cables, two or three further middle support cables are provided, which are attached directly to the support beams or the support structure by means of brackets. These support cables, which attach directly to the support beams or the support structure, result in a high buckling load on the support beams in the area of ​​the brackets guiding the middle support cables or at the contact points of the middle support cables on the support beams when subjected to rockfall or other net loads.

[0007] The invention is based on the objective of designing a protective barrier, which in addition to lower and upper support cables carrying the net has at least one further middle support cable, in such a way that in the event of rockfall or net loading the additional buckling load of the support beams is avoided.

[0008] To solve this problem, the dynamic protective barrier according to the invention is characterized by the features of the characterizing element of claim 1.

[0009] Under net loading conditions, a portion of the load can be transferred directly from the additional central suspension cables to the anchorage of the support beams, so that the support beam experiences only an additional compressive load and no buckling load. An additional advantage is that, compared to known support beams, the support beam can be designed to be slimmer, i.e., more compact, while maintaining the same load-bearing capacity. Preferred embodiments of the invention are described in the dependent claims.

[0010] The rockfall protection barrier according to the invention can have additional brake cables equipped with braking elements, as described in DE 10 2006 013 526.

[0011] The invention is described in more detail below with reference to the drawing: Figure 1 shows in a schematic representation a section of the dynamic protective barrier or protective and safety device according to the invention; Figure 2 The section view shows the contact point between a support cable and a tension element running perpendicular to the support cable.

[0012] The dynamic rockfall protection barrier according to the invention is designed according to the features of claim 1. The tension elements 6 are either only on the outer support beams 3, on several support beams 3 or on all support beams 3 attached or fastened to the protective barrier.

[0013] Each tension element 6 is preferably designed as a tension cable, chain, or steel band, the ends of which are attached or fastened exclusively at the top and bottom of the support beam 3. The contact points are designed as eyelets attached to the tension element 6.

[0014] The tension elements 6 are preferably longer than the respective support beam 3.

[0015] The eyelets 7, preferably designed as rings and preferably also clamp-shaped, are clamped to the tension element 6, which preferably surrounds the eyelet 7 in a substantially arc-shaped manner, wherein a bracket 8, which also substantially arc-shaped, can be clamped to the tension element 6, as shown in Figure 2 is shown.

[0016] Each support beam 3 is preferably pivotable, i.e. tiltable, attached to the ground anchor 4.

[0017] Depending on local requirements, the support beams can also be rigidly clamped, see e.g. DE 20 2013 103 524.

[0018] At the upper ends of the support beams 3, at least one retaining cable 2 is usually attached, the end of which is fastened to a ground anchor.

[0019] The support cables 1, 11 and 21 are preferably arranged on the valley side of the support structure formed by the support girders 3.

Claims

1. Dynamic rockfall protection barrier for protection against rockfall or other natural hazards, comprising - a plurality of support beams (3) fastened in each case to a ground anchorage (4), - a mesh net (5) suspended between the support beams (3), - an upper net support cable (1) running along the upper edge of the mesh net (5), which has a contact point in each case with the support beams (3), - a lower net support cable (11) running along the lower edge of the net (5), which has a contact point in each case with the support beams, - at least one central support cable (21), and - tension elements (6) running substantially perpendicularly to each central support cable (21), - which are fastened to a support beam (3) only with their upper and lower ends and have a contact point (7) with each central support cable (21) and are displaceable relative to the central support cables (21), characterized in that the contact points of the central support cables (21) with the tension elements (6) are formed by eyelets (7) which are attached to each tension element (6) and through which the central support cables (21) pass in a freely displaceable manner.

2. Dynamic protection barrier according to Claim 1, characterized in that the individual tension element (6) is longer than the support beam (3).

3. Dynamic protection barrier according to Claim 1, characterized in that each eyelet (7) is clamped firmly to the tension element (6).

4. Dynamic protection barrier according to Claim 3, characterized in that each tension element (6) surrounds the eyelet (7) in a substantially arcuate manner, and in that a bracket (8) which surrounds the eyelet (7) in a substantially semicircular manner is provided and can be braced with the tension element (6).

5. Dynamic protection barrier according to one of Claims 1 to 4, characterized by tension elements which are attached to the outer support beams (3) of the protection barrier.

6. Dynamic protection barrier according to one of Claims 1 to 5, characterized by tension elements (6) which are attached to a plurality of support beams (3) of the protection barrier.

7. Dynamic protection barrier according to one of Claims 1 to 6, characterized in that each tension element (6) has, in the region of its ends fastened to the support beam (3), a contact point in the form of an eyelet (7) for the upper support cable (1) and the lower support cable (11), wherein the upper or lower support cable (1, 11) passes through the eyelet (7).

8. Dynamic protection barrier according to one of Claims 1 to 6, characterized in that the support cables (1, 11, 21) are guided on the valley side to the support construction formed by the support beams (3) by means of tension elements and eyelets.

9. Dynamic protection barrier according to Claim 1, characterized in that the support beams (3) are fastened pivotably to the ground anchorages (4).

10. Dynamic protection barrier according to one of Claims 1 to 9, characterized in that the support beams (3) are fastened rigidly to the ground anchorages (4).

11. Dynamic protection barrier according to one of Claims 1 to 10, characterized by at least one retaining cable (2) which engages with one end preferably at the upper end of each support beam (3) and is anchored with its other end to a ground anchorage.

12. Dynamic protection barrier according to one of Claims 1 to 11, characterized in that it contains at least two central support cables (21).

13. Dynamic protection barrier according to one of Claims 8 to 12, characterized by at least one cable pulley as a guide for the support cables (1, 11, 21) guided by the tension elements (6).

Images