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Geosynthetics Manufacturing & Project Supply
Composite Drainage Geonet Applications
Composite drainage geonet applications for landfill, tunnel and underground engineering, and roads, railways and airports.
Drainage Applications
Composite Drainage Geonet Applications
High-flow drainage, filtration and protection for environmental, underground and transport infrastructure.
On This Page
System Functions
One Composite, Four Connected Functions
An HDPE three-dimensional drainage core creates an open flow path, while bonded geotextile layers filter adjacent soil and protect the system. Core thickness, compressive strength, flow capacity and filter properties are selected for the site loading and water conditions.
Drainage
Transmits water or gas through a continuous in-plane flow channel.
Filtration
Allows water to enter while retaining soil and other fine particles.
Separation
Prevents adjacent soil and aggregate layers from mixing.
Protection
Cushions waterproofing and lining systems from surrounding materials.
01 / Waste Containment
Landfill
The three-dimensional composite drainage geonet forms a continuous flow path for leachate collection, landfill-gas venting and groundwater protection. Its bonded geotextile filters fine particles to help keep the drainage core open. Compared with a conventional gravel blanket, the lightweight geocomposite installs quickly and provides high in-plane flow in a much thinner layer.
Typical Project Challenges
- Leachate collection and discharge
- Clogging by waste fines
- Landfill-gas pressure
- Groundwater ingress
Leachate Drainage
Gas Venting
Filtration
Groundwater Protection
Applicable Product
02 / Subsurface Structures
Tunnel & Underground Engineering
Installed between the rock support, waterproofing membrane and secondary lining, the composite geonet collects fissure seepage and directs it to longitudinal drains and sumps. The compression-resistant core maintains drainage channels behind the lining, while the geotextile filters sand and rock powder to protect the waterproofing system and reduce hydrostatic pressure.
Typical Project Challenges
- Fissure seepage behind linings
- High hydrostatic pressure
- Clogging by sand and rock powder
- Compression in confined layers
Pressure Relief
Lining Drainage
Filtration
Waterproofing Protection
Applicable Product
03 / Transport Infrastructure
Roads, Railways & Airports
A high-flow HDPE geonet core bonded with geotextiles on both sides combines filtration, drainage and protection beneath transport infrastructure. It helps control water in highway subgrades and pavement layers, beneath railway subgrade or ballast, and under airport runways and aprons, reducing moisture-related softening, pumping, frost damage and differential settlement.
Typical Project Challenges
- Subgrade pumping and frost heave
- Moisture-related pavement damage
- Ballast contamination
- Runway softening and settlement
Subgrade Drainage
Separation
Frost Protection
Load Support
Applicable Product
Selection Priorities
Match the Geocomposite to Load, Flow and Filtration
Long-term drainage depends on more than initial flow capacity. The core and geotextile must remain compatible with the design pressure, gradient, surrounding soil and installation conditions.
Flow Capacity
Size the in-plane transmissivity for the design gradient, expected inflow and boundary conditions.
Compression Resistance
Confirm the core retains adequate thickness and flow under sustained project loading.
Filter Compatibility
Match opening size and permeability to the adjacent soil to limit migration and clogging.
Project Support
Specify the Drainage Geocomposite for the Actual Site Conditions
Share the application, layer build-up, design pressure, expected flow, slope, soil properties and required service life. Our team will recommend a suitable core and filter configuration.