3D composite Drainage Solutions for Civil Engineering

3D Drainage net (also known as 3D composite drainage nets or geocomposite drainage boards) is high‑performance geosynthetics designed for fast, reliable subsurface drainage. Made of an HDPE 3D core bonded with geotextile filters on both sides, they replace traditional gravel drainage layers, delivering higher flow capacity, long‑term stability, and cost savings for infrastructure, environmental, and building projects.

A drainage net is a three‑layer geocomposite：

1：Core: HDPE 3D mesh (bi‑rib or tri‑rib) with rigid vertical ribs and cross supports, forming continuous drainage channels.

2： Filters: Non‑woven geotextile (polypropylene) thermally bonded to both sides, providing filtration, separation, and soil retention.

3： Function: Integrates filtration → drainage → protection → reinforcement in one product.

Key Features & Benefits

1：Superior Drainage CapacityFlow rate: 0.8–2.5 L/min·m (under 200 kPa). Equivalent to 1 m thick gravel but much thinner; drains 5–8× faster than traditional systems.

2： 3D Drainage net High Compressive StrengthWithstands 3000 kPa load without collapse; maintains conductivity under heavy traffic or backfill.

3： Long‑Term DurabilityHDPE core + PP geotextile; acid/alkali resistant, corrosion‑proof, anti‑aging. Service life ≥ 50 years.

4： Anti‑Clogging DesignGeotextile filters fine soil; 3D support prevents fabric intrusion into channels → stable performance over time.

5：Lightweight & Easy InstallationRolls: 1m × 50m or custom widths. 5–10× faster than gravel; reduces labor, equipment, and site disruption.

6：Cost‑EffectiveLower material + installation cost; reduces maintenance; extends project service life.

3D Drainage net Applications：

Civil Engineering • Road / Railway Subgrade: Drain groundwater, prevent frost heave, reduce settlement; extend pavement life by 2–3×. • Retaining Walls: Relieve hydrostatic pressure; prevent wall failure. • Tunnel / Underground: Drain seepage; reduce water ingress and lining damage.

Environmental Engineering • Landfill: Leachate collection; protect liner systems. • Reservoir / Dam: Drain pore water; stabilize embankments. • Mining / Tailings: Dewater sludge; accelerate consolidation. 🏢 Building & Landscape • Foundation Drainage: Keep basements dry; reduce moisture damage. • Green Roofs / Terraces: Drain excess water; protect waterproofing layers. • Parking Decks / Plazas: Surface drainage; prevent ponding.