Construction Site

In simple terms: It does not attach to the mountain slope. Instead, a flexible rockfall barrier wall is installed at the foot of the slope to intercept rocks that have already fallen. It cannot reinforce the mountain itself.

I. What Does the Complete System Consist Of?

1. Steel Columns (I-Beam)

Support the net structure. The standard height is usually 2–7 m, with a standard spacing of 10 meters.

2. Main Net Panels: Two Types

• RX Series: Diamond-shaped Steel Wire rope net, suitable for small and medium-sized falling rocks.

• RXI Series: Ring net (interlocking circular rings), with stronger impact resistance, preferred for large rockfall protection.

3. Supporting Ropes and Anchor Ropes

Hot-dip Galvanized Steel Wire ropes used to tension and secure the entire system.

4. Energy Dissipation Rings (Absorption Rings)【Core Components】

When rocks impact the system, the rings stretch and deform to absorb impact energy, protecting the steel columns from being damaged.

5. Base + Anchor Rods

Fix the steel columns and anchor ropes firmly to stable rock layers underground.

6. Small Grid Mesh

Blocks small fragments and prevents small rocks from passing through the mesh openings.

II. Working Principle

Falling rocks roll down the slope and hit the net surface → the net structure deforms backward → the energy dissipation rings stretch and absorb impact force → the rocks are trapped inside the net, protecting roads, buildings, and people below.

The net will deform after impact. After severe impacts, inspection and replacement of damaged components are required.

III. Main Models (Commonly Used in Engineering)

RX: Diamond-shaped steel wire rope net;
RXI: Ring net with better impact resistance. Local damage only requires replacing individual rings, making maintenance easier, but with a higher cost.

IV. Main Applications

1. Intercepting falling rocks and small-scale collapses from mountains, protecting highways, railways, tunnel entrances, residential areas, and scenic spots.

2. Used as a secondary protection system: Active slope protection nets are installed on the slope surface, while passive protection nets are installed at the slope toe for double protection.

3. Rockfall protection for mining areas, water conservancy projects, and slope stabilization projects.

V. Advantages and Disadvantages

✅ Advantages

· Flexible buffering structure with strong impact resistance, suitable for complex mountainous terrain.

· No large-scale excavation of the mountain is required. Fast installation; the entire system adopts hot-dip galvanized corrosion protection, with a service life of 30–50 years.

· Local damaged components can be replaced individually without dismantling the entire system.

❌ Disadvantages

· Cannot reinforce the mountain body or prevent landslides; it only intercepts rocks that have already fallen.

· Requires sufficient installation space at the slope toe; deformation occurs after impact, requiring regular inspection and maintenance.

VI. Simple Comparison with Active Protection Net

· Active Protection Net: Installed on the slope surface, tightened with anchor bolts, preventing rocks from falling and controlling unstable rocks on the slope.

· Passive Protection Net: Installed at the slope toe, consisting of steel columns and energy dissipation rings, designed to catch rocks that have already rolled down.

Engineering Experience:
For slopes with many unstable rocks, active and passive protection systems are often used together for comprehensive protection.