What Are the Functions of Active Protection Nets?

1. Reinforcement Function:

   • High pull-out resistance to reduce weathering, erosion, and unstable rockfall impacts on slopes.

2. Containment Function:

   • Restrict rockfall movement within a defined range, safeguarding pedestrians and vehicles.

3. Hydrostatic Pressure Mitigation:

   • Stabilize slopes by counteracting destabilizing groundwater pressure and inhibiting further weathering.

4. Ecological Preservation:

   • Protect native vegetation and landforms, allowing plants to thrive within the mesh’s open structure.

5. Structural Advantages:

   • High flexibility, strength, aesthetic integration, and ease of installation.

Proper Installation Guidelines for Active Protection Nets

  1. Slope Clearing

• When Required:

  • Remove loose soil or boulders posing collapse risks within construction zones.

  • Reinforce or dismantle isolated unstable rocks exceeding the system’s maintenance capacity.

  2. Survey & Marking

• Anchor Hole Positioning:

  • Use surveying tools to mark anchor points, prioritizing low-lying areas.

  • For non-conforming locations, install supplementary anchor rods (≥0.5 m length).

  3. Foundation Construction

• Drilling Specifications:

  • Drill depth should exceed the design depth by 5–10 cm to ensure anchorage.

  • For loose soils: Excavate and pour concrete foundations.

• Anchor Types:

  • "Herringbone" Anchors: Two 35 mm-diameter rods angled at 15°–30° for equivalent load-bearing capacity.

  4. Anchor Rod Installation

• Grouting Protocol:

  • Use M30-grade mortar (42.5 Portland cement + ≤3 mm fine sand).

  • Insert anchor rods with grouting pipes; cure grout for ≥3 days before proceeding.

• Concrete Embedment:

  • Directly embed rods in concrete foundations for permanent fixation.