Date of issue:2021-11-15 General view:480
Flexible protection nets have been used in large quantities in recent years. They are mainly used for high-speed road slope protection, reservoir slope treatment, high-speed beautification, and avoiding sediment flow. In these areas, the slope protection net has displayed its unique special features. The advantage is that there is no way to replace other protective net products. Therefore, the progress of slope protection nets has been very rapid in recent years. For those who have no idea about the slope protection net, we will introduce you one by one, the specific components and installation and distribution.
1. The anchor rod is a very tight part of the flexible protective net. The anchor rod is divided into an upper anchor rod and a lower anchor rod. The national standard product generally uses a multi-strand 16mm steel wire rope as it is deemed appropriate. What kind of anchor rod is considered appropriate and used, and finally the upper anchor rod must have a tensile strength of 80KN, and the lower anchor rod must reach 50KN. The tightness of the anchor rod is directly related to the anti-collision level of the protective net.
2. The support rope is also a tight component part of the flexible protective gateway, which is divided into a horizontal support rope and a longitudinal support rope. The diameter of the horizontal support rope is generally 16mm.
3. The column is the support point of the entire child protection. When the falling rock rolls down and touches the protective net, the force of the protective net is evenly distributed, and finally spread to the column. So the tightness of the column is self-evident. Columns are usually treated with hot-dip galvanized surface as deemed appropriate. If the anti-corrosion performance of the column is very poor, it is very easy to corrode when it encounters acid rain, and the corroded column cannot achieve the slope protection effect.
The installation of the flexible protective net usually has drawings. We need to strictly follow the drawings during the construction process. The foundation must be firm at the time of installation of the column, and the column cement should be seamlessly connected to the ground.
The use of protective nets in expressway landslides
The reasons for the high slope protection of the expressway are:
1. The foundation under the roadbed is an unstable natural sliding body;
2. The slopes on both sides of the highway are too steep;
3. Wrongly used the method of slanting layers to fill the embankment;
4. The soil is too wet, which reduces the cohesion and internal friction;
5. The foot of the slope is washed away by water.
6. After the highway was built, the stability of individual rock sections was destroyed, especially when each rock layer tilted toward the road cutting, and subsequent damage caused by water or earthquake.
7. The rock structure and composition of the mountains on both sides of the highway are unstable
Countermeasures:
Generally, the initial control is carried out by combining the active net and the passive net in the sns slope protection net. For high-risk sections such as tunnels, the earth-rock wall shall be assisted for protection when necessary. Long-term protection shall also be carried out on the basis of the slope protection net for mountain greening .
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