Net for Securing Rocks and Rock Slopes

Abstract

Net as a securing or safety net for securing rocks or rock slopes, and against rock falls, landslides or similar natural hazards, wherein said net contains filament yarns from the group of multi- and/or monofilament yarns that are combined in a knot-free manner. In this net, in each case two material strands join at the mesh intersection points, wherein (a) each material strand (A; B) consists of at least two, preferably up to six, individual strands (A 1, A 2 and B 1, B 2 ), and (b) at least one individual strand (A 1 B 1 ) of each material strand (A or B) passes through an intersection point without changing direction, (c) while at least one individual strand (A 2 or B 2 ) of each material strand (A or B) is deflected in the region of this intersection point and is combined with an individual strand (B 1 or A 1 ) of the other material strand (B or A) that passes through an intersection point without changing direction.

What is claimed is: 
     
         1 . A net as safety or catching net for securing rocks and rock slopes, falling rock, mudflow or similar natural hazards, the net comprising filament yarns selected from the group of yarns that is consisting of multi-filament yarns and monofilament yarns and combinations thereof, the yarns combined together free of knots. 
     
     
         2 . The net according to  claim 1 , containing high module polymer fibers. 
     
     
         3 . The net according to  claim 1 , containing high performance polyethylene fibers, especially UHMW-PE fibers. 
     
     
         4 . The net according to  claim 3 , wherein the filaments have a filament tensile strength of 3,000 N/mm 2  to 4,000 N/mm 2 . 
     
     
         5 . The net according to  claim 1 , comprising a net tensile strength >150 kN/m. 
     
     
         6 . The net according to  claim 1 , containing twisted yarns having titers of 1,200 dtex-1,800 dtex, preferably 1,400 dtex to 1,550 dtex, especially 1,500 dtex. 
     
     
         7 . The net according to  claim 1 , containing a coating for abrasion-protective and UV-protective purposes. 
     
     
         8 . The net according to  claim 1 , containing stainless steel fibers, natural fibers or mineral fibers or combinations thereof. 
     
     
         9 . The net according to  claim 1 , comprising material ropes, wherein two material ropes each meet at a mesh crossing point, respectively, and wherein
 (a) each material rope (A, B) is comprised of at least two, preferably up to six, individual ropes (A 1 , A 2  or B 1 , B 2 ),   (b) at least one individual rope (A 1  or B 1 ) of each material rope (A or B) passes through a mesh crossing point without directional change,   (c) while at least one individual rope (A 2  or B 2 ) of each material rope (A or B) is deflected at this mesh crossing point and is brought together with an individual rope (B 1  or A 1 ) of the other material rope (B 2  or A 2 ) passing through this mesh crossing point without directional change.   
     
     
         10 . The net according to  claim 9 , wherein the individual ropes (A 1 , A 2 , B 1 , B 2 ) contain mineral fibers. 
     
     
         11 . The net according to  claim 9 , wherein the individual rope (A 1  or B 1 ) passing without directional change through a first mesh crossing point is deflected in the area of a following second mesh crossing point and meets with an individual rope which has been deflected in the area of a preceding mesh crossing point so as to change its direction. 
     
     
         12 . The net according to  claim 9 , comprising polygonal meshes, especially tetragonal or hexagonal meshes, or rhomboidal meshes. 
     
     
         13 . The net according to  claim 9 , wherein in that in the state of rest the material ropes (A, B) cross each other at an angle α of 15° to 90° in the area of the mesh crossing points. 
     
     
         14 . The net according to  claim 13 , the angle α amounts to 30° to 70°. 
     
     
         15 . The net according to  claim 9 , wherein each individual rope (A 1 , A 2 ; B 1 , B 2 ) consists of a plurality of individual threads, which particularly are stranded, braided, twisted or are laid largely parallel to each other. 
     
     
         16 . The net according to  claim 9 , consisting of a meshwork of crossing material ropes (A and B) containing textile material. 
     
     
         17 . The net according to  claim 9 , wherein the individual ropes (A 1 , A 2 , B 1 , B 2 ) contain textile material. 
     
     
         18 . The net according to  claim 9 , wherein the individual ropes (A 1 , A 2 , B 1 , B 2 ) contain synthetic fibers; natural fibers; or synthetic and natural fibers. 
     
     
         19 . The net according to  claim 9 , wherein the individual ropes (A 1 , A 2 , B 1 , B 2 ) contain mineral fibers. 
     
     
         20 . The net according to  claim 9 , wherein the individual ropes (A 1 , A 2 , B 1 , B 2 ) contain wires, wire bundles, wire strands, wire cords, preferably made of steel or aluminium. 
     
     
         21 . The net according to  claim 9 , wherein the material ropes (A, B) are stranded, braided or laid largely parallel to each other. 
     
     
         22 . The net according to  claim 9 , wherein each material rope (A, B) consists of a plurality of individual ropes (A 1 , A 2 , B 1 , B 2 ) which are stranded, braided, or laid largely parallel to each other. 
     
     
         23 . The net according to  claim 9 , comprising individual ropes (A 1 , A 2 , B 1 , B 2 ) containing filaments of different materials selected from the group consisting of polymer fibers, natural fibers, mineral fibers, and individual wires, comprised of stainless steel or aluminium. 
     
     
         24 . The net according to  claim 1 , containing protective elements for the fiber-protective fastening to slope areas to be secured by means of clamping elements and/or rod anchors. 
     
     
         25 . The net according to  claim 1 , containing mesh crossing points which are glued, welded and/or clamped together. 
     
     
         26 . The net according to  claim 1 , comprising a Raschel knit structure.