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3D HDPE Composite Drainage Geonet with Geotextile for Landfill, Mining Tailings, Heap Leach, Road, Tunnel, Landscape, Garden Drainage

3D HDPE Composite Drainage Geonet with Geotextile for Landfill, Mining Tailings, Heap Leach, Road, Tunnel, Landscape, Garden Drainage

Geocomposite is in three-layer, two or three dimensional drainage geosynthetic products, consist of a goenet core, with heat-bonded nonwoven geotextile on both sides. The geonet is manufactured from high density polyethylene resin, in bixial or trixial structure. The nonwoven geotetile can be polyester staple fiber or long fiber nonwoven geotextile or polypropylen staple fiber nonwoven geotextile.
(1)Fast drainage: The middle strip is rigid, forming a linear drainage channel in the drainage direction, and the ribs on both sides are arranged in a cross to increase the overall stability of the drainage network.
(2)Good flexibility and permeability: In coastal engineering, use its characteristics of good flexibility and permeability to bufferthe impact energy of waves.
(3)Strong high pressure load: Can with stand a compression load of about 3000A for a long time.
(4)Good performance: Made with three-layer special structure, flexible and durable, strong acid and alkali resistance, not perishable, and long service life.
(5)Reduce cold expansion: Laying a three-dimensional composite drainage net can help reduce the impact of frost heave.
(6)Uniform mixing: It can hydrate the concrete evenly, whether it is for rigid roads or flexible road systems.

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Key Technical Advantages

1. Efficient 3D Drainage System
The unique three-dimensional HDPE geonet core creates continuous drainage channels, allowing water to flow rapidly through the structure. It provides excellent in-plane drainage capacity, effectively reduces water accumulation and hydrostatic pressure, and helps maintain stable drainage performance under long-term service conditions.

2. Integrated Filtration, Drainage & Protection
The composite structure combines an HDPE geonet core with nonwoven geotextiles, integrating filtration, drainage, separation, and protection into one system. The geotextile filters soil particles while allowing water to pass through, while the geonet provides an efficient drainage path and protects the surrounding waterproofing or foundation system.

3. Excellent Compressive Strength & Load Resistance
The specially designed three-dimensional core consists of vertical and inclined ribs that provide excellent structural support. It can withstand high compressive loads while maintaining sufficient thickness and drainage space, making it suitable for demanding civil engineering applications such as landfills, roads, railways, retaining structures, and underground projects.

4. Long-Term Drainage Performance
The three-dimensional structure helps reduce geotextile intrusion into the drainage core under pressure, maintaining effective flow channels over time. Its excellent resilience allows the drainage layer to recover and retain its functional thickness even after prolonged loading.

5. High Strength & Outstanding Durability
Manufactured from high-quality HDPE and durable PET/PP nonwoven geotextiles, the composite drainage net provides excellent tensile and shear strength as well as resistance to chemicals, corrosion, moisture, and environmental aging. This ensures reliable performance and a long service life in demanding environments.

6. Filtration & Soil Stabilization
The nonwoven geotextile layers effectively retain soil particles while allowing water to pass through, reducing soil loss, clogging, and erosion. At the same time, the composite structure provides separation and reinforcement functions that help improve foundation and soil stability.

7. Lightweight & Easy Installation
Supplied in convenient rolls, including sizes up to 4.8 m × 50 m, the product is lightweight, flexible, and easy to transport, cut, overlap, and install on site. The large roll width can reduce joints and installation time, helping improve construction efficiency and lower labor costs.

8. Versatile & Customizable Solution
Available in different thicknesses, geonet structures, mesh configurations, roll sizes, and geotextile options to meet specific project requirements. It is widely used in landfills, railway and road subgrades, retaining walls, tunnels, underground structures, foundations, reservoirs, landscaping, sports fields, and other drainage systems.

Basic Info.

Color	Black, White, Green, Blue	Trademark	Zhongloo
Material	Plastic, Polyethylene Resin and Nonwoven Fabric	Application	Landfill, Railway, Road Subgrade Drainage
Project Solution Capability	Graphic design, 3D model design, Total solution for projects	After-sale Service	Online Technical Support, Onsite Installation, Onsite Training
Design Style	Modern	Origin	China
Roll Size	4.8m*50m	Geonet Core Thickness	5.0mm-12.0mm
Length	30-50m	Width	2-4.8m
Mesh size	(8x6 ) +/- 1 to (85x85 ) +- 5	Single package size	50X20X100 cm

Technical Specifications

No.	Item	Unit (Metric / Imperial)	750 g/m²	1000 g/m²	1200 g/m²	1300 g/m²	1400 g/m²	1600 g/m²	1800 g/m²
1	Unit weight of compound	g/m² / oz/yd²	≥750 / ≥22.1	≥1000 / ≥29.5	≥1200 / ≥35.4	≥1300 / ≥38.3	≥1400 / ≥41.3	≥1600 / ≥47.2	≥1800 / ≥53.1
2	Thickness of compound	mm / mil	≥5.0 / ≥197	≥6.0 / ≥236	≥6.0 / ≥236	≥7.0 / ≥276	≥7.0 / ≥276	≥8.0 / ≥315	≥9.0 / ≥354
3	Longitudinal tensile strength of compound product	kN/m / lbf/ft	≥16.0 / ≥1,096	≥16.0 / ≥1,096	≥16.0 / ≥1,096	≥16.0 / ≥1,096	≥16.0 / ≥1,096	≥16.0 / ≥1,096	≥16.0 / ≥1,096
4	Water diversion rate of compound product	m²/s / gal/min/ft	≥1.2×10⁻⁴ / ≥0.97	≥1.2×10⁻⁴ / ≥0.97	≥1.2×10⁻⁴ / ≥0.97	≥1.2×10⁻⁴ / ≥0.97	≥1.2×10⁻⁴ / ≥0.97	≥1.2×10⁻⁴ / ≥0.97	≥1.2×10⁻⁴ / ≥0.97
5	Peel strength of network core and geotextile	kN/m / lbf/ft	≥0.3 / ≥20.6	≥0.3 / ≥20.6	≥0.3 / ≥20.6	≥0.3 / ≥20.6	≥0.3 / ≥20.6	≥0.3 / ≥20.6	≥0.3 / ≥20.6
6	Thickness of network core	mm / mil	≥4.0 / ≥157	≥5.0 / ≥197	≥5.0 / ≥197	≥6.0 / ≥236	≥6.0 / ≥236	≥7.0 / ≥276	≥8.0 / ≥315
7	Tensile strength of network core	kN/m / lbf/ft	≥8.0 / ≥548	≥10.0 / ≥685	≥13.0 / ≥891	≥14.0 / ≥959	≥15.0 / ≥1,028	≥15.0 / ≥1,028	≥15.0 / ≥1,028
8	Unit weight of geotextile	g/m² / oz/yd²	≥200 / ≥5.90	≥200 / ≥5.90	≥200 / ≥5.90	≥200 / ≥5.90	≥200 / ≥5.90	≥200 / ≥5.90	≥200 / ≥5.90
9	Seepage coefficient of geotextile	cm/s / ft/s	≥0.3 / ≥0.00984	≥0.3 / ≥0.00984	≥0.3 / ≥0.00984	≥0.3 / ≥0.00984	≥0.3 / ≥0.00984	≥0.3 / ≥0.00984	≥0.3 / ≥0.00984
10	Width	m / ft	≤3 / ≤9.84	≤3 / ≤9.84	≤3 / ≤9.84	≤3 / ≤9.84	≤3 / ≤9.84	≤3 / ≤9.84	≤3 / ≤9.84
11	Length of one roll	m / ft	As required	As required	As required	As required	As required	As required	As required

Conversion Reference: 1 g/m² = 0.02949 oz/yd² · 1 mm = 39.37 mil · 1 kN/m = 68.52 lbf/ft · 1 m = 3.28084 ft.

Application Solutions

🗑️ Landfill Drainage: Leachate Collection & Geomembrane Protection
Challenges: Landfills generate massive volumes of leachate, creating high hydrostatic pressure that can compromise the primary geomembrane liner. Traditional gravel layers are heavy, occupy valuable airspace, and pose a severe risk of puncturing the geomembrane during installation.
Solution: The 3D HDPE composite drainage geonet serves as a highly efficient, lightweight alternative to gravel. It rapidly collects and channels leachate away from the liner, keeping the saturated water head below the drainage layer's thickness. Its smooth, dimpled structure also provides excellent geomembrane protection against punctures during waste placement.
⛏️ Mining Tailings & Heap Leach Pad Drainage
Challenges: Heap leach pads and tailings ponds require continuous, long-term drainage under immense vertical loads from stacked ore and tailings. Poor drainage can lead to pore pressure buildup, slope instability, and reduced metal recovery efficiency.
Solution: Engineered with a rigid 3D core, this geonet maintains its drainage channels even under extreme compressive loads. It ensures uninterrupted fluid flow for optimal leaching processes and tailings consolidation, while its chemical-resistant HDPE material withstands aggressive mining environments.
🚧 Retaining Wall Back Drainage
Challenges: Water accumulation behind retaining walls generates significant lateral hydrostatic pressure, which can lead to structural failure, cracking, and soil erosion. Traditional sand and gravel backfill can easily clog over time, rendering the drainage system ineffective.
Solution: Installed directly against the wall, the composite geonet acts as a continuous vertical drainage plane. It efficiently relieves hydrostatic pressure and prevents soil saturation. The bonded geotextile acts as a reliable filter, preventing fine backfill particles from migrating into and clogging the drainage core.
🚆 Railway Subgrade Drainage
Challenges: Railway subgrades are subjected to severe dynamic loads and are highly susceptible to water infiltration, which causes frost heave, mud boils, and track settlement. Maintaining a dry subgrade is critical for train safety and track longevity.
Solution: Placed beneath the ballast, the 3D drainage geonet provides high-capacity lateral drainage to intercept and remove groundwater and surface runoff. Its high shear and tensile strength also contribute to subgrade stabilization, reducing differential settlement and maintenance costs.
🛣️ Highway Roadbed & Pavement Drainage
Challenges: Water trapped within the highway pavement structure weakens the base and subbase layers, leading to premature failures like potholes, rutting, and edge cracking. Rapid drainage is essential to preserve the structural integrity of the road.
Solution: The geonet is integrated into the pavement structure to quickly drain infiltrating rainwater and groundwater away from the critical load-bearing layers. This keeps the roadbed dry and stable, significantly extending the pavement's service life and reducing long-term maintenance.
🚇 Tunnel & Underground Structure Drainage
Challenges: Tunnels and underground structures face constant groundwater seepage and high external water pressure. Uncontrolled water ingress can damage electrical systems, degrade concrete linings, and create hazardous driving conditions.
Solution: Applied between the primary support and the waterproof membrane, the 3D composite geonet safely collects and redirects seepage water to the tunnel's drainage system. It effectively relieves external water pressure while protecting the waterproofing membrane from mechanical damage during concrete pouring.
🌳 Landscape, Garden & Playground Drainage
Challenges: Sports fields, golf courses, and landscaped areas require precise water management. Surface waterlogging ruins playing conditions and damages plant roots, while heavy foot traffic and equipment compact the soil, reducing natural infiltration.
Solution: This lightweight, easy-to-install drainage mat quickly removes excess surface water while the integrated geotextile prevents soil loss. Its shallow profile makes it ideal for green roofs, gardens, and playgrounds, ensuring healthy root zones and safe, usable surfaces even after heavy rainfall.