Geocell Installation Guide

Yinchuan Case Study – ASTM D8265 & GB/T 19470 Compliance

‌I. Design & Preparation Phase‌

‌1. Slope Analysis & Design Parameters‌

• Conduct geotechnical surveys assessing:
  • Soil classification (USCS)
  • Stratigraphy & groundwater level
  • Weathering grade (ISRM standards)
• Determine geocell specifications:
  • Cell size: 400-800mm (typical)
  • Tensile strength: ≥25kN/m

‌2. Material Selection‌

• HDPE/PP geocells with:
  • UV stabilization (≥5000 hrs QUV)
  • Carbon black content (2-3% for oxidation resistance)
• Certifications:
  • ISO 13438 (durability)
  • GB/T 17643 (Chinese national standard)

‌3. Construction Planning‌

• Develop work breakdown structure (WBS) covering:
  • Material logistics routes
  • Equipment deployment (compactors ≥18t)
  • Critical path scheduling

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II. Construction Sequence‌

‌1. Subgrade Preparation‌

• Clear vegetation/loose debris
• Achieve 95% Proctor density
• Install French drains (150mm Φ HDPE pipes)

‌2. Base Course Construction‌

• Lay 200-300mm graded aggregate:
  • 20-40mm particle size
  • CBR ≥80%

‌3. Geocell Deployment‌

• Unroll cells along slope contour
• Anchor with J-hooks (500mm spacing)
• Maintain ≤3% installation strain

‌4. Infill Placement‌

• Layer-by-layer compaction:
  • 300mm lifts (max)
  • 92% relative density
• Materials:
  • Crushed stone (25-50mm)
  • Sandy gravel (SW classification)

‌5. Surface Treatment‌

• Apply erosion control matting
• Hydroseed with native grasses

‌III. Critical Considerations‌

‌IV. Post-Construction‌

• ‌Curing Period‌: 28-day minimum
• ‌Monitoring‌:
  • Inclinometers (≤2mm/month displacement)
  • Ground-penetrating radar scans
• ‌Maintenance‌:
  • Biannual drainage inspections
  • Vegetation health audits