Active protection net introduction: The active protection net system is covered with various types of flexible nets mainly made of steel wire rope nets and wrapped on the required protective slopes or rocks, so as to limit the weathering, peeling or damage of rocky soil on the slope surface and the collapse of dangerous rocks (reinforcement effect) ), or control the movement of falling rocks within a certain range (containment effect). The active protection net is a protection technology for dangerous rocks and falling rocks. The advantages of the active protection net are short construction period, strong adaptability to the terrain, relatively sensitive construction and installation, and the active protection net can be installed in any required position on the slope. Active protection The net can withstand the influence of bad weather. The active protection net makes full use of the easy spreadability and high impact resistance of flexible materials. Through this system and a large number of on-site tests, a geological disaster protection technology suitable for various slopes and natural slopes has been formed, so as to facilitate engineering quality control and Accurate measurement of engineering quantities. The active protective net makes full use of the lightweight and easy-to-process characteristics of high-strength metal materials to achieve the intention of lightweight. The construction period of the active protective net is short. Moreover, the installation and maintenance are simple, and it handles the complex terrain conditions in mountainous areas. Traditional protection methods Problems that are difficult to deal with for a long time. The openness of the active protective net use system allows the groundwater to drain freely, avoiding the problem of slope instability caused by the increase of groundwater pressure; the system not only contributes to the stability of the slope, but also inhibits the slope from being damaged. Further weathering and denudation, and there is no special requirement on the slope surface features, without destroying or changing the original landform and vegetation growth conditions on the slope surface, and its open features are necessary for the subsequent or future artificial slope greening when conditions and needs are met. Green plants can grow freely in its open space, and the soil-fixing effect of plant roots is integrated with the slope protection system, thereby inhibiting slope damage and soil erosion, which in turn protects the landform and slope vegetation. Realize the purpose of slope protection and environmental protection.

(1) Strong ability to adapt to foundation deformation Riprap net bag is composed of net sheet and filled stone, which has good ductility and flexibility. For flexible structure, the requirement of bearing capacity of foundation is low In case of uneven subsidence and slight deformation of the ground foundation or sudden disasters such as earthquakes, the adaptive fine-tuning of the net bag riprap itself can reach a new balance (2) Good structural integrity A plurality of riprap net bags can be connected into a whole. A single net bag is partially deformed under the action of external force, and the whole structure will not be damaged (3) It has water permeability, durability and economy The pore water in the soil around the void of the block stone (pebble) in the riprap net pocket can be easily eliminated in time to effectively reduce the adverse effects brought by the void water pressure; The current net bag generally adopts high galvanized low carbon steel wire with long service life; The filling material in the net bag can be made of local materials, such as block stone or pebble, waste residue or old concrete (if the quality requirement is low) (4) Simple construction technology The construction technology of riprap net bag is simple and convenient, and no special large-scale mechanical equipment and special technology are needed, only the Stone is placed manually, sealed and hoisted in place, and the construction progress is fast and not affected by seasons (5) It is beneficial to ecology During the operation of the project, the gap between the rocks in the riprap net pocket will be filled with soil to create conditions for natural growth of vegetation, which is beneficial to ecological environment protection and water and soil conservation

The primary composition of active protective net is divided into three categories: steel wire net, ordinary steel wire grid (often called steel wire grid) and high-degree steel wire grid. The first two are fixed by steel wire anchor and/or support rope, while the latter is fixed by steel bar anchor (which can be prestressed) and steel wire anchor (which is considered suitable when there is marginal support rope). The special anchor backing plate of active protection net uses early marginal support rope and other fixed methods to hide the flexible net as the primary component of the system on the slope with hidden geological disasters, so its protection policy has been successfully completed. Active protective net is often used to reinforce and protect geological disasters such as slope collapse, weathering drop, slip, slip or collapse. The surface characteristic mark of active protective net is to use system anchor rod to fix it as appropriate, and according to the difference of flexible net, say goodbye to the flexible net part by supporting rope and stitching tension (wire rope net or wire grid) or prestressed anchor rod (TECCO-65 grid).

The active protective net not only contributes to the stability of the slope, but also can restrain the slope from further weathering and denudation, and has no special influence on the shape characteristics of the slope When the broken joints and cracks of the slope are well developed, they can accept the ability of pressure grouting to reinforce the slope Under the pressure effect, the grouting fluid seeps through the joint cutting around the hole wall to the surrounding area to form a rock and soil broken slope group to cemente it; Connecting grout columns of broken rock and soil slopes to anchor rods to improve the stability of slope groups When the slope is broken or the slope stratum is fragile, the anchor rod with service life can be pierced to reinforce the slope When dealing with soft rock slope or soil slope, enough soil nails can be inserted into the slope body to reinforce the slope The reinforcement mechanism of soil nailing is similar to that of pile group Prestressed anchor cable is an outstanding deep reinforcement skill when the slope is high and the potential break surface of slope is deep Now, active protective net has gradually become a trend in high slope reinforcement engineering, and more and more people should inherit it