Advantages of Nonwoven Geotextiles in Road Engineering

1. Enhanced Structural Integrity
Nonwoven geotextiles, particularly those made through needle-punching or spunbond techniques, provide exceptional tensile strength and elongation properties. These materials act as a reinforcement layer, distributing loads evenly to prevent road deformation and subsidence. For instance, short-fiber needle-punched nonwoven geotextiles (common in projects like landfill liners and highway bases) exhibit high puncture resistance and permeability, ensuring long-term stability even under heavy traffic loads.

2. Multifunctional Performance

Isolation & Filtration: By separating dissimilar soil layers and filtering fine particles, geotextiles prevent material mixing and maintain drainage efficiency. This is vital for preventing waterlogging and preserving roadbed integrity.

Drainage & Erosion Control: Their three-dimensional porous structure facilitates rapid water flow while retaining soil particles, crucial for slopes and embankments in flood-prone areas.

3. Case Studies: Real-World Impact

Highway Expansion in China 

During the widening of the Jingjin Expressway, engineers employed long-fiber spunbond nonwoven geotextiles to address joint cracks between old and new road sections. The material’s high tensile strength (8 kN/m) and anti-aging properties reduced reflection cracks by 70%, extending the road’s lifespan by 3–6 years.