Image
Flownet® drainage geocomposite is made from lightweight high-density polyethylene (HDPE) and designed with a thin two-dimensional composite construction. The drainage net is bonded to a non-woven geotextile which provides optimum combination of high through-flow capacity for rapid drainage whilst simultaneously preventing fine soil particles from migrating into the drainage core.
It is an economical and effective water, gas and leachate drainage system for use in landfill steep slopes, landfill capping systems, tunnels, bridge abutments and behind vertical structures. Flownet drainage geocomposite offer engineers a proven alternative to traditional thick gravel drainage layers.
Image
WHY CHOOSE FLOWNET DRAINAGE GEOCOMPOSITE?
- Economical alternative to traditional granular drainage layers due to better optimisation of landfill space and faster installation of lightweight composite
- Durable and crush-resistant with the capacity to withstand high loads exceeding 450kPa
- High through-flow capacity for rapid drainage while simultaneously preventing fine soil particles from migrating into the drainage core
- Protects the structure from damage caused by backfill material
- Simple installation process as it is rolled out easily, allowing large surface area to be created quickly and efficiently
- Reduces safety risks on construction sites as the drainage nets are lightweight which minimises the damage to adjacent structures or materials, such as plastic liners
- Proven track record in landfill and mining projects throughout Australia and New Zealand
- Available in rolls up to 3.7m wide and a minimum length of 55m
- Available with single or double sided geotextile, with lighter or heavier grades depending on the specialist applications
The Geofabrics Geosynthetic Innovation, Research & Development (GRID) laboratory offers a service to modify the Flownet Drainage Geocomposites, depending on site specific requirements. Preliminary or complex designs can be proven prior to final design through the GRID to ensure economic and efficient geocomposites with optimised drainage capacities. Additionally, compatibility testing at the GRID ensures the site-specific liquor or leachates drain quickly within the drainage system.
Image
FUNCTION
Drainage
Geosynthetics can act as a drain to carry fluid through less permeable soils. Ideal for use in subsoil drainage systems, can be used to dissipate pore water pressures at the base of road and railway embankments, sports fields and behind retaining walls. Facilitates surface water runoff.
Filtration
Geosynthetics can act as a filter by allowing water to move freely through while preventing the migration of fine particles. Often used to prevent soils from migrating into drainage aggregate or pipes while maintaining flow. Can also prevent soil erosion in coastal and riverbanks when used below loose stones or rocks and other material.
Protection
Geosynthetics can prevent acute damage caused by adjacent materials. Often used together with a barrier to ensure that surrounding areas will not be contaminated. Widely used on landfills, tunnel construction and dams.
