Typical applications include:

• Car parks
• Landfill Gas Drainage
• Bridge Abutments
• Green Roofs
• Retention Bunds
• Grass Paved Areas

Drainage is defined as the collection and transportation of rainwater, groundwater or other fluids such as leachates and gases. Geotextiles are being increasingly used as a more effective and economical alternative to 'traditional' systems.

Perhaps the most common application for geotextiles in drainage systems is wrapping 'french drain' constructions. In this application the geotextile performs a dual role of preventing mixing of the granular infill with the surrounding soil whilst also acting as a filter preventing fines within the moving water from entering the system leading to failure through clogging.

Whilst geotextiles can be used in conveyance of fluids within the structure it is more common that the properties of filtration and separation are harnessed within the overall drainage system. It is these properties that are leading the increasing use of geotextiles in both traditional drainage systems and 'new' designs for Sustainable Drainage Systems (SuDS).

Design Considerations

• Soil conditions
• Hydrology
• Hydrogeology
• Surfacing

Typical applications include:

• Landfill Caps
• Retaining Wall Drainage
• Basement Protection
• Highway Drainage
• Verge Toe and Batter Drains
• Bridge Abutments

Geocomposite drains comprise two or three elements; a filter fabric, a free draining core and a filter fabric or impermeable membrane. They are purposely designed to replace 'traditional' drainage solutions such as low fines graded stone and are highly effective in the collection and conveyance of both liquids and gases.

They offer a low weight, easy to handle, factory controlled, environmentally friendly alternative to 'traditional' methods in a number of applications including road and structural drainage, green roofs, Sustainable Drainage Systems (SuDS) and in the collection and venting of landfill leachate and gases.

Design Considerations

• Soil conditions
• Hydrology
• Hydrogeology
• Load conditions

Typical applications include:

• Permeable Pavements
• Swales
• Abutment Protection
• Dams and Flood Defence Bunds
• Stormwater Containment Lagoons
• Culvert Outfalls

Geocellular systems can be used in a variety of applications in drainage design, from strengthening no fines sub-base through confinement to preventing the erosion of top soils and vegetation in free flowing channels, such as swales they perform in a number of onerous applications prolonging the life of the project and minimising the impact on the environment. To see how TERRAM Geocells can be integrated into your project contact the TERRAM technical team.

Design Considerations

• Soil conditions
• Hydrology
• Hydrogeology
• Load conditions