ELEMENT FOR SLOPE SAFETY

Description

[0001] The present invention relates to an element for slope stabilization, particularly in the areas of avalanche protection, soil, scree and rock retention, or stream bank stabilization, as defined in the preamble of claim 1. Such elements for stabilizing scree, soil, or stream bank stabilization are used, for example, to selectively secure areas in mountainous terrain or on slopes that are susceptible to avalanches or rockfalls. Such elements are also used for avalanche protection to construct retaining elements or retention areas at locations hazardous to snow avalanches. Such slope stabilization elements are also used, for example, in road construction when cuttings are made into the mountainous terrain along the sides of roads to protect these areas against landslides of soil or rock, particularly during severe weather or similar events.

[0002] Such slope stabilization elements are known in various forms in the prior art. For example, DE 20 2010 010 849 U1 discloses an element for avalanche protection or slope stabilization in which a plurality of round timbers are attached to a substantially frame-like base structure via wire loops. This element has proven effective in avalanche protection but has the disadvantage of not being flexible enough for use in certain other, often uneven, areas. For example, this element is difficult to use in the stabilization of riverbeds or streambeds because it has a relatively rigid outer shape and offers no possibility of adaptation to different geological conditions.

[0003] Prior art has also proposed slope stabilization elements in which two support elements are connected in a cross shape and adjustable relative to each other in a scissor-like manner. While this type of scissor-like adjustable cross-shaped slope stabilization element offers the advantage of a certain degree of flexibility, it has the disadvantage that adapting it to different site conditions is sometimes difficult, and the variability in the shape of the individual elements is relatively limited. The two individual struts of the framework can only be erected together and are therefore not easily adaptable in shape and size to different site conditions.

[0004] IT BZ20 060 030 A1 describes an interception and containment barrier consisting of one or more nets supported by arms articulated to a central support element and by a perimeter cable attached to the outer ends of the arms. The central support element essentially consists of a plate with downstream ribs featuring holes for suspending the arms, which are equipped with plates, each with holes. The plates of the arms can engage the ribs parallel to and spaced apart from one another via pins passing through the respective holes, allowing the arms to tilt around the pins and perform a limited spreading motion due to the play between the pins and the holes. This articulated structure is supported by a bracing and anchoring system consisting of a rigid tie rod and tie rod cables.The central support element is hinged to at least one anchor point. The tie rods are attached at one end to the outer end of the arms or to an adjacent area, and at the other end to the anchor point.

[0005] Against this background, the object of the present invention is to provide a slope stabilization element that offers improved adaptability and greater variability in shape and size, installation location, and design, depending on the prevailing geological conditions. Furthermore, the element according to the invention of the present application should also facilitate easier transport, more compact storage options, and simpler assembly at the often difficult-to-access slope locations for deployment and installation.

[0006] This problem is solved by an element for slope stabilization with the features of claim 1. Advantageous embodiments and further developments of the invention are the subject of the dependent claims.

[0007] According to the invention and as specified in claim 1, an element for slope stabilization, particularly in the area of ​​soil retention, avalanche protection, or streambed stabilization, is proposed, comprising a substantially cruciform strut section in the form of a plane-spanning framework made of several interconnected struts, a planar support or restraint device attached to the strut section, and an anchor rod or anchor element projecting rearward substantially perpendicular to the support and the strut section, which is attached to the strut section, wherein at least one or more retaining cables for tensioning the anchor rod at a preset specific angle to the plane of the support are provided between a free end of the anchor rod and the struts, and wherein a central coupling element is provided on the strut section.The struts are each detachably and / or adjustable relative to one another attached to the coupling element, and the anchor rod is movably mounted on the coupling element to adjust the mounting angle relative to the plane of the bracket in several directions, in particular in all directions. With this slope stabilization element and the central coupling element provided in the middle of the strut section, a modularly designed, versatile system is provided, which can be easily and specifically adapted to the respective application areas: Due to the detachable fastening, the struts can be individually replaced on the central coupling element and, for example, provided with different lengths. This allows, for example, square,Rectangular or asymmetrical shapes of the strut section and the element's mounting can be realized. The struts are detachably attached to the coupling element and can each be easily adjusted separately to suit the specific conditions. Furthermore, the anchor rod of the element according to the invention is movably mounted on the coupling element, particularly in all directions, so that the anchor rod can be easily adjusted according to the slope of the terrain where the element is to be installed. The mobility of the anchor rod in multiple and, in particular, all directions has the further advantage that the anchor rod can also be adjusted laterally, for example, to enable installation at an angle on a slope.

[0008] The element according to the invention is therefore highly versatile in its application. The element has a virtually completely modular structure and its individual parts can be easily replaced and modified, for example, if individual elements are damaged. The modular design also allows for temporary shoring of excavations, whereby dismantling can be carried out not as a whole, but also, if necessary, as individual support components.

[0009] The element according to the invention further has the advantage that on-site assembly is quick and requires comparatively little effort. The individual struts, the anchor rod, and the central coupling element can all be transported as separate parts, resulting in a comparatively small transport size. In rough terrain, the individual parts can, if necessary, be carried individually or in groups by one worker and assembled on-site for use. Various types of supports can be used as brackets with a flat design on the strut section: For example, nets, wire mesh, wooden posts, or parallel metal beams can be attached to the respective struts of the strut section.The struts themselves are connected to the anchor rod via one or more retaining cables, thus enabling secure tensioning of the anchor rod at the desired inclination and preset angle. The slope stabilization element according to the invention further has the advantage that only a single central element, namely the coupling element, is used for both the variable assembly and detachable fastening of the struts as well as the assembly and fastening of the anchor rod itself. This means that relatively few complex components are required for the assembly and installation of the slope stabilization element.

[0010] According to one aspect of the invention, the coupling element is designed as a centrally hinged lock for opening and closing a joint receptacle for a joint connection or a joint part of the anchor rod. Such a lock can, for example, be manufactured as a rotatable or hinged element that opens and securely closes the opening or receptacle of the joint connection for receiving the anchor rod by actuating the coupling element itself. Such a lock can, for example, be manufactured from a plate-shaped or box-like element with a hinge-like connection and a division in the middle. This simplifies assembly and reduces the number of necessary individual parts. Other types of lock-shaped coupling elements known to those skilled in the art can also be used for this purpose.This further simplifies the construction of the slope stabilization element and allows for numerous modular variations of the element without replacing its basic components. For example, different shapes or lengths of anchor rods can be used in the coupling element's lock on-site. This also allows for even better adaptation to varying geological conditions. According to an advantageous embodiment of the invention, the flat support on the frame or strut section is a wire mesh or net. For example, metallic wire mesh or metallic or textile nets can be used to retain debris, avalanche debris, rock, or soil between the cross-shaped struts. Depending on the application, a finer-mesh net or wire mesh can be used for soil.Securing rockfalls or avalanches may also require a more robust support structure, allowing, for example, the use of rigid metal grids or individual wooden or metal struts on the strut section, either additionally or as an alternative to tensioning the flat support. The element according to the invention is therefore highly versatile in its applications and can be easily and optimally adapted on-site by the installers to meet specific requirements.

[0011] According to a further advantageous embodiment of the invention, the coupling element is designed as a coupling element with a hinge. The coupling element thus itself comprises a hinge or is designed as a hinge, which is realized, for example, by a hinge-like connection at a central area of ​​the coupling element. In this way, the coupling element can be opened specifically for, for example, inserting the anchor rod into the central recess. Furthermore, for transport, the pre-assembled struts can be folded together in pairs, thus reducing the size and volume of the element for transport.

[0012] According to a further advantageous embodiment of the invention, the coupling element has a central opening, recess, or bore for pivotally receiving a joint part of the anchor rod. The coupling element thus serves not only for mounting and fastening the struts of the strut section or the frame, but also for centrally mounting and supporting the anchor rod on one and the same element. The coupling element is therefore, so to speak, the connection and central support for both the individually fastened struts of the strut section and for mounting and pivotally attaching the pivotable anchor rod. For this purpose, the central coupling element has, in addition to the receptacles for the ring-shaped, projecting struts, a central opening, recess, or bore suitable for directly pivotally receiving the anchor rod. Alternatively, a separate joint part can also be used.The joint connection can be formed, for example, as a ball joint, a pin / bore joint, or other types of joints. The receptacle on the coupling element is designed to allow direct articulated integration of the anchor rod into the coupling element. This eliminates the need for additional components such as joint sleeves or similar items, although they can be incorporated in alternative embodiments according to the invention. The design of the element according to the invention is thus surprisingly simple and offers high variability and numerous functional possibilities. It presents a completely modular new form of such elements for slope stabilization. The number of necessary individual parts is significantly reduced.

[0013] According to a further advantageous embodiment of the invention, the struts each have several attachment points for the retaining cables. The retaining cables, which are tensioned between the free end of the anchor rod and the struts, can thus be mounted at multiple points on the respective struts. For example, building upon a basic version with four retaining cables and four cross-shaped struts, eight retaining cables with four struts and two attachment points each can also be used, further increasing the strength and stability of the element. This also has the advantage that, in certain geological conditions such as rocks or the like, the cables can be attached and tensioned at different positions on the struts as needed.According to an alternative embodiment of the invention, the attachment points on the struts simultaneously serve as a holder for the retaining cables and the flat support, such as a power supply unit.

[0014] According to a further advantageous embodiment of the invention, detachable fasteners for the struts are provided on the coupling element. These detachable fasteners can be implemented, for example, as two screw holes per strut for bolts with protruding retaining flanges on the coupling element. Alternatively, the detachable fasteners can be implemented as plug-in connections or positive-locking connections. With these detachable fasteners on the coupling element, the struts can be easily mounted on site and, if necessary, used for example, to change the strut shape when different strut lengths are required. The struts are thus each connected and fastened independently to the central coupling element.Different angles can be achieved in the mounting of the struts, for example, by using differently oriented angle settings for the detachable fasteners on the coupling element. The shape of the detachable fasteners can vary: for example, ring-shaped, protruding spigots or flange sections with screw holes corresponding to the screw holes on the free ends of the struts can be provided, into which bolts with nuts can be mounted. The struts are preferably attached to the central coupling element with at least two screw connections per strut, ensuring secure lateral fixation and stability of the strut section despite the detachable assembly.

[0015] According to a further advantageous embodiment of the invention, the coupling element is provided with variably adjustable fixings for the individual struts at the angle of the struts. This variable adjustability with respect to the angle of the struts can be achieved, for example, by different screw holes, slotted holes, or other suitable means. Slotted holes also allow for pre-assembly followed by angular adjustment of the struts relative to each other. In this way, different angular settings of the struts relative to each other and to the overall structure of the element can be achieved with one and the same coupling element. This offers considerable advantages, for example, when rocks or unevenness need to be compensated for at the installation site.

[0016] According to a further advantageous embodiment of the invention, the coupling element includes a receptacle adapted to the shape of a joint part for a corresponding joint part in an anchor rod. The receptacle in the coupling element is, for example, a bore or an opening into which a corresponding joint part for the anchor rod can be easily inserted. The joint part can itself be part of the anchor rod, for example, in the form of a round or semicircular extension or a spherical shape, or the joint part can alternatively be a separate part to which the anchor rod is then attached. In an advantageous embodiment, a combination of a ball head and a ball socket is used as the joint part, wherein the ball head is located either on the side of the anchor rod or on the side of the coupling element. This allows the anchor rod to move in all directions.Alternative joint components include, for example, anchor rods with a spherical semicircular projection, double pin / bore connections with mobility in several axes, or similar devices as are known to those skilled in the art for such articulated connections of rods for slope elements.

[0017] According to a further advantageous embodiment of the invention, the opening or receiving of the coupling element for the joint part can be realized by a hinged mechanism that can be fixed with screws or levers, into which the anchor rod can be inserted for opening. The central opening is thus realized as a kind of hinged part that can be unfolded to allow insertion into corresponding recesses in the coupling part. In this way, the coupling element can fulfill both the fixing and the articulated support of the anchor rod in one and the same component. The number of elements and parts required for the construction is thus further reduced. The assembly and construction of the slope stabilization element are also made even simpler as a result.

[0018] According to a further advantageous embodiment of the invention, the retaining cables are provided with means for adjusting the effective length and / or for pretensioning. This allows the individual cables to be firmly fixed in place at the desired angle and, as required, tensioned more or less tightly. The tensioning of the strut section and thus of the support element (net, grid, etc.) can therefore be achieved even more effectively. The individual cable lengths can be adjusted so that the desired angular position of the anchor rod relative to the plane of the planar support is firmly fixed in the desired shape and can thus be optimally adapted to the corresponding geological conditions on site. The individual cables can be implemented, for example, with tensioning loops or tensioning elements.Alternatively, spring-loaded clamping elements can be provided to allow some flexibility in the connection of the strut part to the anchor rod.

[0019] Further advantageous embodiments, features, benefits, and realizations of the invention will become apparent from the following description of several exemplary embodiments, which will be explained in more detail with reference to the accompanying figures in the drawings. The invention is not limited to the exemplary embodiments shown therein, but can be varied within the scope of the accompanying claims. The drawings show: Fig. 1 a perspective side view of an erected and fully assembled slope stabilization element according to the invention in a first embodiment; Fig. 2a and Fig. 2b each a top view and a side view of the first embodiment of the invention without a flat support; Fig. 3 a side view of the first embodiment of the slope stabilization element according to the invention with a partially unfolded strut section for mounting the anchor rod in the erected state; Fig. 3a an enlarged partial view of the top view of the first embodiment of the element according to the invention in the area of ​​the coupling element; Fig. 3b and Fig. 3c partial enlarged side views of the slope stabilization element according to the invention in the area of ​​the coupling element and the mounting of the anchor rod provided with a hinged part; Fig.3Your enlarged partial view of the unfolded situation of the embodiment of the element for slope stabilization according to . Fig. 3 Fig. 4: A side view of a second embodiment of an element according to the invention for slope stabilization with an alternative shape of a joint part; Figs. 4a to 4d: Detailed views of the second embodiment of an element according to the invention for slope stabilization in the area of ​​the coupling element and the joint part with ball head and ball as joint part; Fig. 5a: A side view of the first embodiment of the element according to the invention for slope stabilization to illustrate the mobility of the anchor rod with a detailed view Fig. 5b in the area of ​​the coupling element and joint part; and Fig. 6 a side view of the second embodiment of the element according to the invention for slope stabilization to illustrate the mobility and pivotability of the anchor rod for assembly.

[0020] The Fig. 1 The drawing shows, in a perspective side view, a first embodiment of an element 10 for slope stabilization in its assembled and ready-to-use state, with a flat support 3 in the form of a grid or net. Fig. 2a und 2b show a top view and a side view of the corresponding first embodiment of element 10 according to the invention and in the Fig. 3, 3a bis 3c Detailed or partial views illustrating the function and construction of element 10 with respect to a central coupling element 5 are shown. According to this first embodiment, the slope stabilization element 10 comprises a strut section 1 or scaffold section in the form of four X-shaped projecting struts 2, which are detachably attached to a central coupling element 5. An anchor rod 4 is mounted on the rear side of the strut section 1 via a connection to the coupling element 5. This anchor rod 4 is used for anchoring in the ground or for tilting the element at the assembly site. The free ends of the anchor rod 4 are secured to the struts 2 by retaining cables 6 via corresponding fixings 12.The anchor rod 4 is installed and mounted in a central opening 8 or receptacle in the coupling element 5 via an articulated form, so that it has a mobility, in particular in all directions, in a range of, for example, up to 30°, preferably in a range of at least 5° to 20° relative to the plane of the support 3 (see arrows in . Fig. 2b , Fig. 4 and Fig. 5a ).

[0021] The strut section 1 of element 10 in this embodiment is realized with four struts 2 of approximately equal length in the form of H-profiles. Other shapes of struts 2 can also be used, each of which is detachably attached to the central coupling element 5 by means of screws or similar fasteners. The coupling element 5 itself is formed with a hinge 7, so that it can be opened in a central area after loosening fixing screws or similar (see Figure 1). Fig. 3 und Fig. 3d The coupling element 5 thus serves not only for fastening and detachably mounting the individual struts 2, but also for receiving and acting as a lock for fastening and mounting a hinge part 9, 11 of the anchor rod 4. For this purpose, a central opening 8 or recess is provided in the middle area of ​​the coupling element 5, which can be opened by unfolding the hinge 7 for mounting the anchor rod 4. Subsequently, the coupling part 5 is folded back together and fixed in the assembled position with fastening screws and screw connections 14 equipped with plate elements (see Figure 1). Fig. 3a, 3b und 3c The struts 2 of the strut section 1 are also detachably mounted to the corresponding spigots or flange sections of the coupling element 5 via screws 13. This allows the entire construction of the modular element 10 to be easily adapted to the respective needs and conditions, for example by using different lengths of struts 2 (see figure). Fig. 2a and length variation with the distance X) or that the angles of the struts 2 to each other are varied by changing the mounting angle on the coupling element 5 (see arrows in Fig. 2a ).

[0022] The flat support 3 of the slope stabilization element 10 is, in this example, a wire mesh or grid section, which is attached to the rear of the struts 2 at corresponding points 12 together with the retaining cables 6. Several attachment points 12 are provided on the struts 2 for this purpose, into which the retaining cables 6 and the flat support 3 can be inserted and fastened together. Alternatively, the flat support 3 can also be attached separately and differently. In the embodiment according to the Fig. 1 und Fig. 2b Eight retaining cables 6 are each mounted to the struts 2 with a free end of the anchor rod. Alternatively, only four retaining cables 6 can be used to tension and adjust the desired angle of the anchor rod 4 (see figure). Fig. 5a und Fig. 6 ).

[0023] In the Fig. 3 The first embodiment of a slope stabilization element 10 according to the invention is shown in an unfolded position of the strut part 1 or the coupling element 5, in order to be able to insert the anchor rod 4 into the opening 8 in the central area of ​​the coupling element 5. As can also be seen from the detailed views of the Fig. 3a, 3b, 3c und 3d As can be seen, in this first embodiment, element 10 has a coupling element 5 with a hinge 7 in which a central opening 8 is provided for inserting the anchor rod 4. The anchor rod 4 is provided with a semicircular, cone-shaped projection on which a joint part 11 is located for pivoting the anchor rod 4 relative to the plane of the struts 2 of the strut part 1 (see figure). Fig. 3c und 3d The anchor rod 4 is inserted into the opening 8 in the open position of the hinge 7, and then the coupling element 5 is folded back and secured with appropriate tabs or screws 14 (see figure). Fig. 3a und Fig. 3c ). Then the basic construction of element 10 is ready for setup and only the flat support 3 remains (see. Fig. 1 ) and alternatively or additionally, the retaining cables 6 are mounted at corresponding attachment points 12 of the struts 2. This allows the desired inclination or angle of the anchor rod 4 to be adjusted accordingly, so that, for example, a swivel range of 10° to 30° can be set depending on the geological conditions and the slope of a hillside.

[0024] In this first embodiment of the invention, the coupling element 5 is a part provided with ring-shaped flange sections, each of which has two bores for screws 13 for mounting the struts 2. The struts 2 can also be mounted at a different angle relative to each other, for example, by using different holes or by providing elongated holes or slotted holes for the screws 13 of the struts. After the hinge 7 is closed and the anchor rod 4 is inserted, the anchor rod 4 is securely held in the opening 8 of the coupling element, but is movably mounted within a certain range, for example, from 5° to 20° or even up to 30° in all directions. The struts 2 themselves are mounted to the coupling element 5 via detachable connections.Furthermore, the folding hinge 7 allows two struts 2 to be folded together, for example, to facilitate transport or to further adapt the element 10 to a specific installation situation. The element 10 according to the invention is thus completely modular and highly versatile in its applications. Struts 2 of different lengths, various angle settings of the struts 2 relative to each other, and the angle of the anchor rod 4 can be adjusted accordingly and fixed in the desired number using the retaining cables 6. The bracket 3 on the strut section 2, which is mounted here on the rear side of the anchor rod 4, can also have a different form; for example, textile nets, rod elements, grid sections, or strut sections can be used, depending on the type of fastening (avalanche protection, scree protection, rock support, etc.) to be achieved with the element 10.

[0025] In Fig. 4, 4a bis 4d A second embodiment of the element 10 according to the invention for slope stabilization is shown in a side view and in detail views. In contrast to the first embodiment described above, the articulated connection of the anchor rod 4 to the coupling element is implemented differently here: Instead of a joint part 11 molded directly onto the anchor rod 4, this second embodiment provides a combination of a ball head with a ball socket for the unidirectional movement of the anchor rod 4. The joint part 9 is a separate element with a ball head, which, as in the first embodiment, can be inserted into a central opening 8 of the coupling element 5 by opening the hinge 7 (see Figure 1). Fig. 4b und Fig. 4d The anchor rod 4 itself has a ball socket 16 at its end pointing towards the strut part 1 (cf. Fig. 4a ), into which the ball-head joint part 9 can be inserted and secured with a pin 17. In this way, optimal mobility of the anchor rod 4 in all directions is also enabled, allowing for better adaptation to local conditions.

[0026] The inclination angle of the retaining part 1 can be changed by varying the anchor rod 4 relative to the strut part 1 with the four detachably attached struts 2. On the other hand, this second embodiment provides a reduced number of retaining cables 6. Here, as in Fig. 4 As shown, only four retaining cables 6 are mounted between the free end of the anchor rod 4 and the outer attachment points 12 on the struts 2. The more inwardly located attachment points 12 can also be used to secure the retaining cables 6. The flat bracket 3, not shown separately in the figures, can also be mounted on the rear side of the strut section 1, for example, at the attachment points 12 of the retaining cables 6, together with them, in this embodiment of the invention. In other respects, the slope stabilization element 10 of the second embodiment is comparable to that of the first embodiment described above, so reference can be made to the parts and identical elements described therein.

[0027] In this second embodiment, the struts 2 are also detachably mounted via screw connections 13 on ring-shaped projecting flange sections of the central coupling element 5. This allows for the use of struts 2 of different lengths. For example, rectangular or even asymmetrical elements 10 can be created in this way. Furthermore, the angle of the mounting elements on the coupling element 5, such as the screw connections 13 (see figure), can be changed. Fig. 3a and Fig. 4b The angle of the individual struts to each other can vary. The elements 10 of the invention are therefore modular, versatile, and easily adaptable to specific requirements and local conditions. In this second embodiment as well, two struts 2 can be folded together with the hinge 7 on the coupling element 5, thus facilitating transport and enabling the anchor rod 4 to be attached to the central opening 8 in the manner of a lock element (see Figure 1). Fig. 4d , Fig. 3d ).

[0028] In the Fig. 5a, 5b und Fig. 6 The two exemplary embodiments are shown again in respective side views and a detail view ( Fig. 5b ) shown to illustrate the adjustability of the angle of the anchor rod 4 to the plane of the strut part 1 with its bracket 3 (cf. Fig. 1 ) and with the individually mounted struts 2, each of which can be removed. This allows the anchor rod 4 to be adjusted and firmly fixed at the desired angle using corresponding retaining cables 6. In the embodiment according to Fig. 6 For this purpose, adjusting means 15 are provided on the retaining cables 6, with which the effective length of the retaining cables 6 can be changed or tension can be achieved. Alternatively or additionally, spring elements or similar can also be incorporated so that a kind of pretension can be set on the retaining cables 6. With the elements 10 for slope stabilization according to the invention, a wide variety of applications can be realized without the need for complex modifications to the design. The design can be easily varied on-site by the installers themselves without the need for major modifications or adjustments.

[0029] The struts 2 of the strut section 1 can also have a different shape than the one shown: Instead of H-shaped beams, T-beams, I-beams, or even simple round or square tubes can be used. In the illustrated embodiments, the anchor rod 4 is designed as a hollow round tube. Other rod elements, such as solid rods, U-profiles, or similar, can also be used, as long as a hinged part 9, 11 is provided for articulated connection to the central coupling element 5 and as long as the individual struts 2, together with the anchor rod, can be detachably mounted to the central coupling element 5. In the two illustrated embodiments, the struts 2 are connected to the ring-shaped projecting flanges of the coupling element 5 via screw connections 13 as detachable fasteners.Instead of screws, other types of detachable fasteners, such as clamps, dowel pins, positive locking connections, etc., can also be used, as long as the struts 2 can be securely mounted and fixed to the central coupling element 5 for assembly.

Claims

1. Element (10) for slope securement, in particular in the area of avalanche protection, soil, boulder and rock retention or stream bed securement, with a substantially cross-shaped strut part (1) in the form of a plane-stretching framework consisting of a plurality of struts (2) coupled to each other, with a flat holder (3) fixed to the strut part (1) and with an anchor rod (4) or anchor element which projects rearwards substantially perpendicular to the holder (3) and to the strut part (1) and which is fixed to the strut part (1), wherein between a free end of the anchor rod (4) and the struts (2) in each case holding ropes (6) are provided for bracing the anchor rod (4) at a preset specific angle to the plane of the holder (3), wherein a central coupling element (5) is provided on the strut part (1), to which coupling element the struts (2) are each releasably and / or adjustably fastened with one of their ends and in that the anchor rod (4) is mounted on the coupling element (5) for adjusting a mounting angle in relation to the plane of the holder (3), in particular movably in all directions, characterised in that the coupling element (5) is designed as a centrally hinged or opening lock for assembly and opening and for closing a joint retainer for a joint connection or a joint part (9) of the anchor rod (4).

2. Element (10) according to claim 1, characterised in that the flat holder (3) is a wire mesh or a net.

3. Element (10) according to claim 1 or 2, characterised in that the coupling element (5) comprises a folding hinge (7).

4. Element (10) according to any of the preceding claims, characterised in that the coupling element (5) has a central opening (8), recess or bore for pivotably receiving a joint part (9) of the anchor rod (4).

5. Element (10) according to any of the preceding claims, characterised in that the struts (2) each have a plurality of fastening points (12) for holding ropes (6).

6. Element (10) according to any of the preceding claims, characterised in that detachable fasteners (13) for the struts (2) are provided on the coupling element (5).

7. Element (10) according to any of the preceding claims, characterised in that fasteners (13) for the struts (2) which can be variably adjusted at the angle of the struts (2) are provided on the coupling element (5).

8. Element (10) according to any of the preceding claims, characterised in that a retainer adapted to the shape of a joint part (9, 11) for a correspondingly shaped joint part (9, 11) of the anchor rod (4) is provided in the coupling element (5).

9. Element (10) according to any of the preceding claims 4 to 8, characterised in that the opening (8) or retainer for the joint part (11) can be opened by a folding hinge (7), which can be fixed with screw connections (14), for inserting the anchor rod (4).

10. Element (10) according to any of the preceding claims, characterised in that the holding ropes (6) are provided with means (15) for variably adjusting the effective length or for pretensioning.