2 passive protection net
Definition: It is to install the wire rope net on the slope foot, next to the highway, etc. When there is a huge stone rolling down, the stone can be effectively intercepted.
Passive protection net
Classification: According to the shape of the mesh, it can be divided into ring net and diamond net passive protection net and unfortunately divided into: RX-025 passive protective net, RX-050 passive protective net, RX-100 passive protective net, RX- 150 Passive protective net, RX-200 passive protective net, etc.
Composition: 1. The wire rope net is the most important component of the passive protective net 2 . Anchor bolts, steel columns, pedestals, and support ropes are used to secure the wire rope net. Without these fixed systems, passive protective nets cannot provide effective protection. The decompression ring is also an indispensable part of the passive system, and he can fully exert the overall protection effect.
Generally, the passive protection net can reach 500KJ in impact resistance, and is widely used in highways, parks, railways, etc. Passive protective nets are the most effective protection against serious damage caused by natural disasters.
Material: wire rope net, support rope and pressure reducing ring
Construction: wire rope net or ring net (adding a layer of wire grid when intercepting small pieces of falling rock), fixing system (anchor, anchor rope, base and support rope), decompression ring and steel column four main parts Composition
The flexibility and interception strength of the system are sufficient to absorb and disperse the expected rockfall impact kinetic energy. The design and adoption of the energy dissipation ring further enhances the impact resistance of the system. Compared with the rigid intercepting and the masonry retaining wall, the original construction process has been changed, and the construction period and funds have been reduced.
Product use: It is suitable for the high mountains and mountains with buffer zone next to the building facilities. It intercepts rock falls, flying stones, avalanches and mudslides outside the building facilities, avoiding the damage of the building facilities caused by disasters.
Common specifications: [steel column (pitch 10M), ∮16 double support rope with energy dissipation ring and ∮16" human" shaped pull-up anchor rope (6 energy dissipation rings per span), ∮16 side pull anchor rope (single Rope), wire rope net, ∮8 stitching rope, grille net
3 Relevant description: The use of the slope protection net in the highway railway landslide is a protection net to ensure the safety of the slope. The slope protection net plays an increasingly important role in highway protection, mine and embankment. Slope protection nets are installed in many places, highways, and slope protection nets are often seen on both sides of the railway. It can be seen that the slope protection net is a safety net that guarantees the natural environment and indispensable life and property. Installing a slope protection net is a challenging task, especially in high mountains and steep hillsides, which is very difficult. Today I will share the experience with you and discuss it together.
As shown in Figure 1, before installing the slope protection net, it is necessary to clean the gravel and debris on the hillside. The cleaning work is very important and can effectively ensure the smooth progress of the work.
2, we are going to cut the slope for the weird mountain. The purpose of cutting the slope is not only conducive to the installation of the slope protection net, but also to ensure the degree of firmness of the slope protection net to a large extent.
3. It is essential to install the slope protection net anchor.
Anchor installation steps:
(1) Select the hole where the foundation is relatively firm. The depth of the air is determined according to the engineering requirements. Generally, it is determined according to the size of the cat plate. It is about 8 mm longer than the length of the bolt. The diameter of the hole is not less than 45 mm. The size directly determines the firmness of the bolt.
(2) After drilling the hole, it is necessary to install the anchor rod and grout, generally using good cement and sand.
As shown in Figure 4, we need to install the support rope to fix the support rope on the anchor to ensure that the tension of the support rope is not too large or too small. This requires experience to control.
5, after the support rope is installed, the next step is the final procedure - hanging the net. Each flexible protective net is laid and stitched with a suture.
Active protection network
However, when installing a slope protection net, we often encounter dangerous rocks that pose great safety hazards to the installation work, so we need to remove dangerous rock before installing the slope protection net. So how do we remove dangerous rocks and what should we pay attention to when removing dangerous rocks?
1. When removing dangerous rocks, remove them from top to bottom. Do not remove them. The following is also cleared.
2, the removal of dangerous rock we generally use manual removal, when encountering larger rocks, use some small equipment for cleaning.
3. Whether it is a dangerous rock, we need to make a serious judgment. When judging a rock as a dangerous rock, we must also pay attention to whether the rock is in contact with other rocks. If the rock affects other rocks, try not to clean it.
As shown in Figure 4, the cleaned rock needs to be treated, not on the road. When cleaning, be sure to pay attention to other non-workers and vehicles nearby.
5, it is best not to use the method of blasting, because the slope is not strong, if the blasting method may cause damage to the entire mountain. After the cleaning is completed, we can install the slope protection net.