Understanding the Flexible Protective Grille
The Flexible Protective Grille is composed of steel columns, flexible metal nets, bases, support ropes, locks, etc. It is mainly used for protecting small rockfalls and foreign object invasions on slope-type road cuts. Its components are independent replaceable units, which are convenient for installation and replacement.
The Flexible Protective Grille is mainly composed of profiled steel columns (including end columns and intermediate steel columns), steel column foundations, interception steel wire ropes, double-twisted hexagonal nets, end lock devices, and interval pressure plates, etc.
The height of the columns is determined based on the height of the slope, slope ratio, rock type, terrain conditions, etc. Generally, 1.8m or 2.5m is adopted. When other heights are used, individual design should be carried out.
Configuration and Parameters
| Model number | PPS-005 | PPS-010 |
| Protective energy level | 50kJ | 100kJ |
| Allowance for buffer distance | 1.5m | 2.5m |
Main construction requirements
Steel column foundation construction → Steel column positioning and installation → Installation and debugging of interception steel wire ropes and end locking devices → Installation of flexible metal nets → Installation of pressure plates at intervals between interception steel wire ropes.
- When laying out the positions of the steel column bases, each base should be placed as close as possible on the same level line.
- 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.
- Blasting operations are prohibited during the construction of steel column foundations. The foundation is constructed using a vertical slotting method. It is advisable to carry out the construction during the dry season and sunny days. At the same time, the anchor bolts and ground anchors should be pre-buried and concrete should be poured in time.
- The design length of each link of the flexible mesh fence should not exceed 50 meters. At the points of slope change, additional diagonal braces should be added to enhance stability.
- The lowest point of the void between the low-lying ground is more than 30 cm away from the lower support rope. It should be filled with steel wire rope and flexible metal net. If the distance is less than 30 cm, the void should be filled with flexible metal net.
- The flexible metal net is laid on the inner side of the system (the side facing the mountain). The flexible metal net is fixed to the interception wire rope using steel wires or connecting components. At least 4 fixed points should be set per square meter; the connection points of each flexible metal net should overlap by no less than 10 cm.
- When the end steel column is placed on the slope surface, it is necessary to measure the slope angle on site and transmit the data back to the factory for custom processing of the slope support.
- When the flexible lattice screen is installed on the top of the wall, there should be gaps between each link to ensure that people can pass through and prevent the stones from rolling down.
