Advantages of Biaxial Plastic Geogrids in Ground Reinforcement
Advantages of Biaxial Plastic Geogrids in Ground Reinforcement
The following analysis details the benefits of biaxial plastic geogrids in ground reinforcement, focusing on material properties, engineering efficiency, and practical applications:
I. Material Properties and Working Principles
Structural Design
Biaxial Stretching Process: High-temperature stretching in longitudinal and transverse directions creates a high-density grid structure with aligned molecular chains, enhancing tensile strength (balanced longitudinal/transverse strength of 20–100 kN/m).
Node Fusion Technology: Reinforced intersections ensure effective soil-grid interlock to prevent slippage.
Material Performance
High Modulus, Low Creep: Polyethylene (HDPE) or polypropylene (PP) materials exhibit minimal long-term deformation (creep rate <3%/year), ideal for projects requiring stability.
Chemical Resistance: Withstands acids, alkalis, salts, and microbial erosion, offering a service life >50 years in harsh environments (e.g., coastal areas, industrial zones).
Soil Interaction Mechanism
Reinforcement Principle: Forms a composite structure with soil, dispersing localized loads via friction and interlock to reduce stress concentration.
Lateral Displacement Restriction: Prevents soil particle movement and shear failure, improving overall shear strength.
II. Core Advantages in Ground Reinforcement
Enhanced Bearing Capacity and Uniform Settlement
Soft Soil Treatment: Increases bearing capacity by 2–5x and reduces settlement by 30%–60% in soft soils (e.g., silt, backfill).
Differential Settlement Control: Distributes loads evenly to mitigate cracks and structural tilting (e.g., roadbeds, tank foundations).
Construction Efficiency and Cost Savings
Lightweight: 1/10 the weight of steel mesh, reducing transport and labor costs.
Rapid Installation: Lay directly on leveled ground with minimal anchoring (overlap ≥30 cm), cutting duration by >40%.
Cost-Effective: 20%–30% lower material + labor costs vs. reinforced concrete, with near-zero maintenance.
Environmental Adaptability and Sustainability
Harsh Condition Suitability: Suppresses frost heave in permafrost and enhances slope stability (eco-slopes with vegetation).
Eco-Friendly: Recyclable, reduces quarrying/cement use, and lowers carbon footprint.
III. Typical Application Scenarios
| Scenario | Traditional Challenges | Biaxial geogrid Solutions |
|---|---|---|
| Road/Railway Subgrade | Frequent soft soil settlement, high repair costs | Layered grids + fill form a "flexible raft foundation," extending service life |
| Port Yards | Heavy loads cause ground deformation | Distribute container loads to reduce subsidence |
| Filled Slopes | Soil slippage and collapses | Reinforcement + vegetation for eco-structural stability |
| Landfill Bases | Leachate corrosion and uneven settlement | Composite geogrid-geomembrane layers for anti-seepage and deformation resistance |
IV. Key Construction Guidelines
Ground Preparation
Remove sharp debris; compact to ensure flatness (error ≤5 cm/2m).
Add gravel drainage layers (10–15 cm thick) in wet environments.
Installation and Connection
Align primary load direction (longitudinal) perpendicular to potential slippage; secure overlaps with U-pins or adhesives.
For slopes: Install top-down with fill layers ≤30 cm, compacted sequentially.
Long-Term Monitoring
Inspect regularly for exposed/damaged grids; cover with protective layers (geotextile + soil).
Conclusion：
Biaxial plastic geogrids revolutionize ground reinforcement through high strength, corrosion resistance, and efficient soil interaction. They excel in soft soil treatment, heavy-load zones, and eco-sensitive areas, improving project quality while reducing lifecycle costs. Proper geological assessment and standardized installation are critical to maximizing their technical benefits.
