Biaxial Geogrid: A Versatile Geosynthetic Material for Engineering Applications

Material Characteristics

• Structure: Polymer mesh with equal tensile strength in longitudinal & transverse directions (typical aperture size: 15-50mm)

• Mechanical Properties:

• Tensile strength: 20-100 kN/m (ASTM D6637)

• Junction efficiency: ≥90%

• Creep resistance: <2% strain @ 50% ultimate load

Key Functions & Applications

1. Roadway Reinforcement

• Load Distribution

• Reduces vertical stress on subgrade by 30-50% through tensioned membrane effect

• Typical installation: Between subbase and base layers (stiffness ratio ≥3:1)

• Embankment Stabilization

• Increases factor of safety against sliding by 1.5-2.0x in soft soils (Cu<25kPa)

• Reduces differential settlement by 40-60% in high fills (>6m)

2. Slope Protection Systems

• Mechanical Stabilization

• Enhances soil shear strength parameters (Δφ ≈ 5-8°) through interlock mechanism

• Installation: Layered at 0.5-1.0m vertical spacing on 1V:1.5H slopes

• Vegetative Support

• Root penetration depth increases by 2-3x compared to unreinforced slopes

• Erosion control efficiency: ≥85% under 50mm/hr rainfall

3. Retaining Wall Construction

• Lateral Stress Reduction

• Decreases active earth pressure by 20-30% (vs. conventional designs)

• Allows 15-25% reduction in wall section dimensions

• Cost Efficiency

• Saves $15-30/m² through reduced concrete/stone volume

4. Hydraulic Structures

• Levee Reinforcement

• Reduces seepage velocity by 60-80% when combined with clay cores

• Withstands 0.5-1.0m post-construction settlement

• Canal Lining

• Extends service life by 3-5x versus unreinforced concrete linings

5. Railway Engineering

• Track Bed Improvement

• Decreases ballast penetration by 70-90% (FAR<5%)

• Maintains track geometry under 25-30 MT axle loads

• Subgrade Treatment

• Eliminates mud pumping in clayey subgrades (CBR improvement ≥5 points)

Title: "Biaxial Geogrid Technology: Multifunctional Solutions for Infrastructure Projects"

Design Considerations:
▸ Aperture Selection: 0.6-0.8 × D₈₅ of fill material
▸ Embedment Length: Minimum 1.5m beyond failure plane
▸ Overlap Requirements: 300-500mm with mechanical connections

Performance Standards:
✔ ISO 10318 - Geogrid identification
✔ EN 15381 - Road reinforcement applications
✔ AREMA Ch.1 - Railway specifications

Sustainability Benefits:
◉ Carbon Reduction: 1 ton geogrid replaces 50-80 tons natural aggregates
◉ Recyclability: 100% reprocessable (PP/HDPE formulations)
◉ Service Life: 75+ years in buried conditions