Understanding the GPS2 Active Protection Net
The GPS2 active protection net is characterized by being fixed with system anchor rods. Depending on the type of flexible net, it is pre-tensioned through support ropes and stitching or prestressed anchor rods to achieve pre-tensioning of the flexible net section, thereby providing continuous support for the entire slope. The pre-tensioning operation makes the system as close as possible to the slope surface, forming a prestress that restrains the local movement of rock and soil or restrains it in place after local displacement or damage, thus realizing its active protection function.
The other two types of Active Protection Net
The TECCO active protection net belongs to the SNS (Safety Netting System) active protection system. It uses pre-stressed steel bars (anchor rods) or steel wire rope anchor rods (when edge support ropes are available) along with special anchor pads and, if necessary, edge support ropes to fix the flexible net on the slopes with potential geological hazards, thereby achieving its active protection function.
The SPIDER active protection net, refers to a slope protection net system mainly composed of hot-dip galvanized steel ropes and steel wires. It has the advantages of high toughness, high protection strength, high anti-corrosion and rust prevention, and easy deployment. The twisted wires of the spider net have undergone hot-dip galvanizing treatment, with excellent anti-corrosion performance. Its service life can reach up to 30-50 years under outdoor conditions.
Configuration and Parameters
| System model | APS-050 | APS-075 | APS-100 | APS-150 | APS-200 |
| Protective energy level (kN) | 50 | 75 | 100 | 150 | 200 |
| Flexibility metal mesh impact resistance (kN) | ≥50 | ≥75 | ≥100 | ≥150 | ≥200 |
| Horizontal support rope | Φ10 | Φ12 | Φ12 | Φ16 | Φ18 |
| Vertical support rope | Φ10 | Φ12 | Φ12 | Φ16 | Φ16 |
| Suture cord | Φ6 | Φ6 | Φ8 | Φ8 | Φ10 |
Main construction requirements
- When there is floating soil or floating stones on the protective slope, they should be removed before the protective net is installed.
- The anchor bolt cement mortar (cement slurry) should be injected from the bottom of the hole with reverse pressure to ensure a dense and full injection.
- When installing the protective net, the system should be segmented at 40 to 60 meters. Usually, it is segmented at 50 meters.
- The anchoring and suturing active protection system first fixes the supporting rope with anchor rods, and then uses the suturing rope to sew and tension the flexible metal net and the supporting rope together.
- The anchoring and stitching active protection system uses steel wires to fix the small metal mesh of the flexible metal net onto the large metal mesh of the flexible net. At least 4 fixed points should be provided per square meter, and the connection points of the small metal mesh of the flexible net should overlap by no less than 10 cm. The large metal mesh of the flexible net is sewn together with the surrounding support ropes using stitching ropes and pre-tensioned.
