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Description of the protection system: 1. The criss-crossing φ16 longitudinal and lateral support ropes are connected with the anchor ropes arranged in the 4.5X4.5m square mode (the edge parts are sometimes 4.5X2.5m as needed) and pre-tensioned. A D0/08/300/4X4m (or 4X2m) wire rope net is laid in a 4.5X4.5m (or 4.5X2.5m) grid. Each wire rope net is stitched and fastened with suture ropes around the support ropes. The pre-tensioning process enables the system to apply a certain normal pre-tightening pressure to the slope surface, thereby improving the stability of the surface rock and soil, preventing the occurrence of collapse and falling rock as much as possible and limiting a small part of the falling rock to a certain space. Internal movement, at the same time, laying a small mesh S0/2.2/50 grille mesh under the steel wire mesh to prevent the collapse of small-sized rock blocks.
2. Construction sequence and process: 1 The active protective net shall be constructed after the construction of the slope rapid flow trough, and the floating soil and pumice stone in the slope protection area shall be removed. 2 The line measurement determines the anchor hole position (according to the terrain conditions, the hole spacing can have an adjustment of 0.3m), and a hole with a depth not less than the length of the exposed exposed ring of the bolt is drilled in each hole position, generally 20cm in diameter , 15cm deep. 3 Drill the anchor hole and clear the hole according to the design depth. The hole depth should be more than 5cm longer than the design anchor rope length, and the hole diameter is not less than φ42. When limited by the rock drilling equipment, the two steel ropes constituting each anchor rope can be anchored separately. Two anchor holes with a hole diameter not less than φ35 form a herringbone anchor rope, and the angle between the two steel ropes is 15-30° to achieve the same anchoring effect. 4 grouting and inserting the anchor rope (the top end of the exposed rope loop of the anchor rope can not be higher than the surface, and the loop sleeve can not be grouted to ensure that the support rope is as close as possible to the surface after tensioning). M40 cement mortar should be used, and the slurry should be ensured in the hole. Full, the slurry is cured for not less than three days before the next process. 5Install the vertical and horizontal support ropes, and use 2~4 ends for tensioning and tensioning. (2 when the length of the support rope is less than 15m, 4 when the length is more than 30m, and 3 between them)) The rope card and the anchor rope exposed ring cover Fixed connection. 6 hang the grille net from top to bottom, the overlap width between the grille nets is not less than 5cm, the stitching between the two grille nets and the grid net and the support rope are spliced ​​by φ1.2 wire at a distance of 1m (there is In the condition, the process can be completed before the previous process, that is, the grid mesh is placed under the support rope. 7 The steel rope net is laid from top to bottom and stitched, the suture rope is φ8 steel rope, and each steel rope net is used one. The suture rope with a length of about 31 m (or 27 m) is sutured and pre-tensioned with the surrounding support rope, and the two ends of the suture rope are fixedly coupled with the net rope by two rope cards.
3. When the slope rock layer is broken and loose, the anchor rope can be lengthened.

The SNS flexible slope protection net is an important measure to prevent natural disasters. The active slope protection net is installed on the slopes which are prone to falling rocks or soft soil, which can not only play the role of enclosure, but also to some extent Intercept blockage, solidification of green plants, and protection of slopes without destroying the ecological water system.

The main components of the active slope protection net: the steel wire rope with a diameter of 8mm is pressed into a 4mX4m diamond mesh by a professional hydraulic device through a buckle; the wire mesh (chain link net) is laid in the wire rope net, The wire of not less than 200 filaments is woven by a large hook-and-hook machine, and the mesh is between 50mm and 65mm. Such composite protective nets meet the requirements of various mountaines (earthstones) because of their combined protection. The wire rope mesh has a high toughness and can withstand considerable impact. The wire mesh has a small hole and can intercept most of the collapsed stones. The impact force received is transmitted to the wire rope network and is The buffer is eliminated.