● Grid Confinement Effect
The interlocking grid structure constrains soil particles, redistributing vertical loads horizontally to minimize stress concentration. This geometric reinforcement effectively lowers deformation risks while enhancing load-bearing capacity by 30-50% compared to unreinforced soil.
● Tensile Reinforcement Mechanism
High-strength polymer ribs integrate with soil matrices, increasing composite shear strength by 35-60%. The bidirectional design provides uniform tensile resistance (20-150 kN/m), significantly improving slope stability and resistance to lateral displacement.
● Integrated Drainage Function
Certain biaxial geogrid variants incorporate capillary drainage channels that redirect pore water from roadbeds to drainage systems. This dual-function design reduces hydrostatic pressure, preventing subgrade softening and erosion-induced failures.
Standardized Installation Protocol
|| Key Steps || Technical Specifications ||
|—————|——————————-|
| Site Preparation | Compact subgrade to 95% density; Remove sharp protrusions >3cm |
| Lattice Deployment | Align primary strength direction perpendicular to traffic flow |
| Overlap Configuration | 15-20cm longitudinal / 10cm transverse overlaps with polymer binding |
| Anchoring System | U-shaped pins at 1.5-2m intervals; Immediate backfilling ≤15cm aggregate |
| Compaction Control | Layered compaction in ≤30cm lifts; 90-95% relative compaction density |
Documented Performance Benefits
- Bearing Capacity Enhancement: Laboratory tests confirm 30% higher CBR values in reinforced sections versus control groups.
- Settlement Reduction: Field monitoring shows 30-50% less differential settlement in highway embankments after 5-year service.
- Erosion Mitigation: Slope protection applications demonstrate 80% reduction in soil loss during 50-year flood simulations.
Critical Application Guidelines
- Material Selection: Prioritize PP or HDPE geogrids with UV stabilizers for permanent installations (GB/T17689-2008 compliance)
- Directional Alignment: Ensure transverse ribs parallel to potential shear planes in slope reinforcement
- Construction Sequencing: Complete installation within 4 hours of unrolling to prevent UV degradation
Engineering Impact: Properly installed bidirectional geogrids extend roadway service life by 40% while reducing aggregate requirements by 15-30%, establishing them as cost-effective soil reinforcement solutions across transportation infrastructure.
