3D mesh

Three-dimensional (3D) geomat is a three-dimensional structure material processed from polymer synthetic materials (Polyethylene PE or Polypropylene PP) through a special extrusion process. It belongs to the category of reinforcement materials in the new material technology field of the National High-Tech Product Catalog. With a porosity of up to 90%, the material is loose, flexible, and features a 3D spatial network structure that can be filled with soil, sand, and gravel.

Unlike 2D geonets (planar grid structures), 3D geomat has a three-dimensional spatial configuration that provides omnidirectional restraint on soil particles through its 3D mesh openings, significantly enhancing the overall stability of the soil mass.

Main Applications

1 Highway and Railway Engineering

Cut slope protection: Replaces traditional methods such as concrete frameworks and rubble masonry, with construction costs 1/7~1/8 of conventional solutions

Embankment slope greening: Integrates engineering protection with ecological greening

Soft soil subgrade treatment: Functions as a reinforcement layer to improve subgrade stability

2 Hydraulic Engineering

Riverbank protection: Withstands flow velocities of 3~4 m/s, and 5~6 m/s for 4-5 hours

Dam slope protection: Prevents wave erosion and soil loss

Reservoir bank protection: Wave dissipation and slope greening

3 Environmental Engineering

Desert sand stabilization: Increases surface roughness, promotes sediment deposition, prevents dune migration

Mine ecological restoration: Revegetation of abandoned mine slopes

Urban landscaping: Landscape slopes and vertical greening projects

4 Municipal Engineering

Landfill closure: Final cover slope protection

Building slopes: Temporary or permanent slope greening protection

Construction Precautions

1 Pre-construction Preparation

Slope leveling: Remove stones (>25mm), plant roots, debris, and other obstacles. The slope surface must be smooth and compact

Soil improvement: For poor soil or rocky slopes, backfill 2~5cm of nutrient-rich soil and moisten

Base treatment: For rockfill embankments, apply 30~50mm of topsoil on the slope surface before geomat installation

2 Laying and Fixing

Unrolling method: Lay from top to bottom along the slope direction. The geomat must be in close contact with the slope surface without

Overlap requirements: Adjacent geomat sections shall overlap by ≥10cm. The upper layer at the overlap shall fit tightly without gaps

Fixing method:

Use U-shaped steel pins or bamboo stakes, length ≥15cm (penetration depth)

Spacing 30cm, minimum 10 pins per square meter

Excavate trenches (20cm wide × 30cm deep) 30cm beyond slope crest and toe, embed geomat ends, and backfill with compaction

Complex terrain treatment: Increase pin density at terrain突变 points to ensure smooth geomat contact

3 Soil Covering and Seeding

Soil covering requirements:

Fill soil in multiple layers to ensure mesh cells are filled without exposure

Cover thickness to just cover the geomat (approximately 2cm)

Use fertile topsoil; add organic fertilizer or compost for poor soil

Seed selection:

Select grass species suitable for local climate with well-developed root systems

Interplant with perennial shrubs to enhance soil retention

Seeding method:

Manual broadcasting or hydraulic seeding

Seeds shall be placed within the geomat to allow roots to penetrate through for composite protection

4 Maintenance Management

Watering and curing: Minimum 45 days curing period, maintain soil moisture at 40%~50%

Reseeding: Promptly reseed sparse or bare areas

Pest and disease control: Regularly apply broad-spectrum agents for prevention

Rainy season protection: Cover with non-woven fabric or straw mats during rainy season construction to prevent