KR20020037267A - Catchment Net for Rockfall Catchment Systems or the Like - Google Patents

Abstract

PURPOSE: A catchment net for rockfall catchment systems is provided to additionally equip connection elements for connecting a net to the support elements at its outside, and absorb the energy incurred in the event of a rock falling into the net. CONSTITUTION: A catchment net for rockfall catchment systems includes a net(12) and support elements(16,17,18,19). The net(12) is retained on the outside, on at least two mutually-opposing sides, by least one peripheral cable(14,15) in each case, and/or by a tensioning cable(22). Additional connection elements(25), which connect the net(12) to the support elements at its outside, make it possible for the energy incurred in the event of a rock(23) or the like falling into the net to be absorbed to the maximum. However, the connection elements can also be secured additionally or only in the interior of the net.

Description

Catchment Net for Rockfall Catchment Systems or the Like}

The present invention relates to a capture net for a rockfall capture system having a net comprising a ring or the like coupled to each other and having a means for supporting the net, in each case at least one peripheral cable and / or tension. By the carrier, the net is supported on the outside on at least two sides facing each other.

According to the catching net of the type according to specification document EP-A-0 679 437, in the first embodiment, each of the rings is made of a wire with several windings. The rings are then surrounded by other rings until what is known as a ring-net is formed.

The net has proved to be of high value in practice. When rocks or gravel fall into the net, a limited amount of energy can be absorbed by the specified net dimension without shear of the net and without falling rocks that must fall through and stop.

The problem of the present invention is to develop another capture net of the type described at the outset, based on the current capture net so that more energy can be absorbed with less effort in design and configuration by the capture net. It is also to follow the present invention that current capture net structures absorb equally more energy. In addition, if the surrounding cables or tension cables are damaged (shear) by excessive load, the system must perform a protective action as a whole.

The problem is solved by the present invention, and additional connecting elements are provided which couple the net to the vehicle on the outside and / or the inside, so that the energy generated by the rocks and the like falling into the net is absorbed.

According to an embodiment of the capture net according to the invention, by using the additional connection elements, the energy generated by the rockfall impact can be absorbed by up to 30% or more without the net shearing. The connecting elements are easy to manufacture and can be secured to the net on one side and the net on the other side with little effort and cost.

The connecting elements have proved to be quite advantageous as braking means and have the effect of imparting a predetermined elongation of the connecting element at the corresponding tensile load.

Embodiments of the present invention and other advantages will be described in detail with reference to the accompanying drawings.

1A is a front view of the capture net of the present invention in a horizontal arrangement as a support;

2A is a fragmentary view of the capture net of the present invention in a vertical arrangement;

3A is a fragmentary view of a modification of the capture net;

4A is a partial front view of a capture net in which additional connection elements are provided and according to FIG. 1;

* Symbol description *

10 ... acquisition net 14, 15 ... peripheral cable

18,19 ... support element 25 ... connecting element

33 ... net 47 ... braking means

The capture net 10 shown in FIG. 1 is configured as a gallery and arranged horizontally. The acquisition net 10 is constituted by a net 12 composed of rings 12 'connected to each other. In each case in this position, the peripheral cables 14, 15 and the supporting elements 16, 17 on the narrower outer sides are fixed to the overhang, the rock wall 11, etc., and oblique to the outside. Extending substantially vertically and upwardly in a well arranged position. Another two support elements 18, 19 are fixed in the rock between the outer support elements 18, 19 at equal intervals from each other, the further support elements arranged in parallel with the outer elements, The net is supported at the front end as well as at the end. The support elements 16 to 19 are further supported by support cables 21, fixed to the front end of the support, and fixed to the rock face. The support elements each extend obliquely to the rear, and the two support cables 21 are configured rearward to the left and right from the support elements such that the support elements are optimally positioned on the rock face 11 from a static point of view. It is fixed. In addition, transverse tension cables 22 are provided on the outer support elements 16, 17.

In general, the trapping nets 10 of the above-described type is placed on the upper part of the railway, road, etc., such as rock 23, gravel, timber trunk, timber branches, such that the objects do not fall on the railroad or road below can not do it.

According to the invention, further connection elements 25 are provided which connect the bet 12 with the vehicle on the outside and / or inside, so that the rock 23 or the like falls inside the net 12. The energy generated is absorbed. In the present invention, the support elements 16 to 19 are used as vehicles. However, the connecting elements 25 can also be fixed to the support cable 21 and the individual anchors or the like.

In each case connecting elements 25 having the same dimensions at the outer and lower ends are provided for each support element 16 to 19. In each case the connecting element 25 is arranged on the support elements 16, 17 located on the outside, towards the upper and lower ends.

As a result, at each part of the net 12, four said connecting elements are provided between the supporting elements. The vehicle is of course assembled with four or more or eight connecting elements, respectively.

With this arrangement, additional energy absorption is formed in different parts of the net 12, so that the net as a whole has a significantly heavier weight and / or more energy than is possible in the prior art nets. Can catch rocks.

In each case, the connecting element 25 is integrated to use at least one braking means 27, 27 ′, so that the tensile energy, etc. generated when the rock or the like falls into the net, is suitably absorbed by the net. do. Such braking means are described in specifications US Pat. No. 5,207,302. The means is for example formed to use a ring consisting of a bent metal tube (metal rod), connected to a cable at one end and supported by a support element, and to a cable fixed to the net at the other end. The proximal end of the metal tube is also surrounded by the retaining ring 28. In addition, the braking means 29 are provided on the support cables 21.

Referring to the above description, the braking means 27 ′ together with the connecting elements 25 and the connecting elements extend within the central portion of the net 1, the rocks 2 fall into the braking means, Thus, the rings of the braking means are relatively smaller. As the load increases, the rings shear and become defined breaks.

According to another advantage of the invention, if the connecting elements are sheared and at least the rings are stretched and damaged, the connecting elements 25 are replaced with new connecting elements without any difficulty. In fact, a predetermined break point or break point is formed in the capture net with a predetermined amount of energy, and can be easily replaced. The replacement is made by means of the reference break or breakpoints unconstrained from the vehicle and the net and by means of suitable fastening of the new connecting elements.

The sliding elements 24 allow the net 12 to be movable on the peripheral cables 14, 15, each sliding element 24 having a peripheral side ring 12 ′ and a peripheral cable 14. , 15) form a ring around it.

According to this arrangement, according to another advantage obtained in the configuration of the present invention, when the rock is released into the net, the transverse element 12 "in the hinged direction of the peripheral cable with respect to the impact position is similar to the case of curtain. Ring bundles are pressed in the net, resulting in an increase in the strength of the net in the impact zone.

By means of the connecting elements 25, the rows of components of the rings are fixed rearward with respect to the impact position. Referring to FIG. 1, when the falling rock collides inside the net and pulls the net downward, in the first stage, the braking rings 27 "extend and the connecting elements shear in the first stage. (25) are drawn together so that a determinable proportion of the total absorbed energy required can be absorbed.

Referring to FIG. 2, a capture net 30 is shown which is arranged approximately vertically in a partial view, and in contrast to FIG. 1, the capture net 30 is arranged on an oblique slope and inclined like rocks 31. Rolling down the material is captured. The catching net 30 is fixed to the substantially vertical support elements 34, 38 provided as a vehicle, and the support elements are fixed by the support cables 36. The net 33 is composed of rings 33 ', which in turn slide up and down each other, and in each case the rings are composed of several wire windings. The net 33 is supported at the top and bottom by peripheral cables 41 and 42 which are configured substantially horizontal, and then the net 33 by sliding elements 44 provided at the rings 33 '. ) May move along the peripheral cables 41 and 42 in the same manner as the curtain.

According to the invention, connecting elements 45 are provided which connect the support elements 34, 38 with the net 3 on the outside of the upper 45 ′ and the bottom, and the net in the inner 45 ″, In each case, the two connecting elements are fastened to the support element at the upper end and the two connecting elements are fastened at the lower end. The two connecting elements extending within the inner 45 "of the net are approximately identical. With a length, one of the connecting elements is fixed in the upper part of the net and the other in the lower part. The connecting elements located in the part of the net where the rock 31 impinges extend in order. Thus in each case the rings of the braking means 47 are reduced, for example, to a small diameter of 25 cm to only a few cm under no load.

Referring to Fig. 2, because the rock collides with the net, the bundles of the net are moved transversely relative to the peripheral cables 41 and 42, similar to curtains. For this purpose, the individual rings on the outside of the net are made movable on the individual peripheral cables 41, 42 by sliding elements. According to the invention, the connecting elements 45 influence the movement of the ring bundles with a defined resistance.

Referring to FIG. 3, a portion of the capture net system 50 is shown, which extends in the same direction from the support element 51 and has several connection elements 52, 53, 54, 56, 67 arranged in the same position. The connecting elements then have a braking means 55. The connecting elements 52, 53, 54 are connected to the outside of the net 50, and the connecting elements 56, 57 are fixed inside the net. In connection with the figure, two connecting elements 56, 57 with nets are arranged in front of the peripheral cable 59, which are then arranged behind the supporting element 51 at the recessed side. In each case, the braking means 55 acting in the same way as the shock absorber has a peripheral retaining ring 55 'at its proximal ends. The connecting elements 52, 53, 54, 56, 67 starting from the support element 51 have, in each case, different lengths and are thus fixed to the net 58 on the outside and at different positions and at fixed intervals. Fixed inside, when the rock falls, the connecting elements absorb energy continuously or all together until sheared.

In the case of a rock collision, the net first extends perpendicularly to the longitudinal extension, and during the process, the individual component rows of rings which are laterally constructed relative to the longitudinal extension are pulled against each other in the opposite direction to the impact position. Lose. At the moment when the component row connected to the connecting element 54 on the outside is pulled, the connecting elements facing each other on both sides exert a supporting effect on the component row of the ring until the braking rings of the supporting elements are extended and consequently sheared. With this, the components of the rings are further attracted, so that the adjacent connecting elements 53 move.

Referring to FIG. 4, in another variant of the capture net 10, further connecting elements 25 are shown, which are connected at one end to the outer or inner end of the support elements 18, 19, respectively. And the inside of the net at the other end 25 ", not the outside of the net. From the support elements 18 and 19, two connecting elements move inward and outward, respectively. Compared to the embodiment, the net's capture strength is increased, i.e., heavier objects can be reliably captured by the net.

The present invention is suitably described by the above embodiments. Of course, in other embodiments the invention is similarly described.

For example, depending on the application, the connecting elements may have different dimensions and materials and different lengths along FIG. 3 so that different absorbent capacity, shear resistance or braking effects can be obtained. In principle, several connecting elements can be installed in parallel and / or in series with each other.

The capture net of FIG. 1 can of course also be arranged as a gallery on an oblique slope. The number, length, and width of the constituent regions formed by the spaced apart support elements can be arbitrarily suited according to the local peripheral state.

Peripheral cables may also be constituted by double cable guides and suitable braking rings are arranged on the support elements for reference.

The braking means can of course be constructed differently from the above description or are designed as originally known friction elements.

In principle, the connecting elements are only fixed inside the net and not outside, and are not described in detail. The connecting elements can also be arranged in any required position, such as the center of the support element as well as the conveying means on the end side.

When the net is unloaded, the connecting elements are provided with a length such that the connecting elements fall somewhat but are not sufficiently stretched. If only one rock falls into the net, the arrangement allows the net to move equally to the cotton and the net to move only to a limited extent before the connecting elements elongate.

Claims (10)

Nets 12, 33 consisting of rings 12 ', 33', etc., coupled to each other, and carrying means for supporting said nets, in each case at least one peripheral cable 14, 15, 41, 42; And / or a catching net for a rockfall catching system or the like, which is supported in place on the outside by at least two sides of the nets 12 and 33 facing each other by means of a tension cable 22, On the outside and / or inside additional connecting elements 25, 45 are provided which connect the nets 12, 33 to the vehicle so that rocks 23, 31, etc. can fall into the nets 12, 33. Acquisition net, characterized in that the energy generated when it can be absorbed. The method according to claim 1, wherein in each case at least one braking means (27, 27 ′, 47) is integrally formed in the individual connecting elements (25, 45), and the rocks (23, 31, etc.) , 33) Capture net, characterized in that the energy generated when falling inside is absorbed proportionally. 3. The braking device according to claim 2, wherein the braking means (27, 27 ', 47) consists of a ring, the ring is made of a metal tube, connected at one end to a cable supported by a conveying means, and at the other end A capture net connected to a cable secured by a net (12, 33), wherein adjacent end regions of the metal tube are surrounded by a retaining ring (28). The at least one peripheral cable (14, 15) according to any one of the preceding claims, wherein the net can be moved like a curtain by a ring (12 ') or the like along the peripheral cable (14, 15). A net, characterized in that the net (12) is supported on the outside on at least two sides facing each other by. 5. The section according to one of the preceding claims, wherein in each case several connecting elements (52, 53, 54, 56, 57) move from the vehicle, have different lengths and are then defined to each other. Fixed to the net 58 at different locations in the field so that when the rock falls into the net, the connecting elements 52, 53, 54, 56, 57 absorb energy from one another or are in sequence until sheared. A capture net, characterized by absorbing energy. 6. The capture net according to one of the preceding claims, characterized in that the energy absorbed by the net (12) and the energy of the connecting element (25) coincide with each other. The net as claimed in one of the preceding claims, characterized in that for each vehicle, at least one connecting element (25) is fixed at the outer and lower ends. 8. The connection element according to one of the preceding claims, wherein in each case the connecting elements 25, 45 are fixed to the support at one end and at least one inside the net at the other end 25 ", 45". Acquisition nets characterized in being secured to two rings (12 ', 33') and the like. 9. The method according to one of the preceding claims, wherein in each case at least one connecting element 25 in the net 10 dpp is connected between the two means at the outer parts and in each case by means of the means. A capture net, characterized in that connected to at least two on the inside of the net. 10. Acquisition net according to one of the preceding claims, characterized in that the connecting elements (25, 45) are symmetrically paired with respect to the center of the center of the net and secured to the net.