Geohazard Challenges Addressed by Passive Barriers ？ 

 

    Passive rockfall barriers mitigate slope degradation and soil erosion, thereby preserving geomorphological integrity and slope vegetation to achieve dual objectives of slope stabilization and ecological conservation.  

    Critical Construction Specifications

    1. Anchor Rod Requirements  

     - Design Standard: Anchor length 2.0–3.0m (GB/T 38509-2020)  

     - Pull-Out Resistance: ≥50kN (EN 1997-1:2004 compliance)  

     - Quality Assurance: Non-destructive testing (NDT) mandatory; grout density 75–90% (ASTM D4435-13 verified)  

    2. Optimized Engineering Practices

     - Synergistic Design: Integrate with existing slope support anchors (system/random anchors) to reduce redundancy and enhance structural synergy.  

     - Corrosion Protection:  

     - Galvanized mesh (Zn≥350g/m², ISO 1461-certified)  

     - Anchor rods require epoxy coating (DFT≥250μm, ISO 12944-C5M standard) or cathodic protection.  

    3. Rock-Surface Compliance

     - Clearance Limit: ≤300mm gap between mesh and rock surface (exceeding voids reduce efficacy by 40% per field tests).  

     - Surface Preparation: Grind protrusions >150mm; fill recesses >200mm with shotcrete (M30 grade).  

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Key Construction Challenges & Solutions