Draining geosynthetics and geocomposites
These products boast distinct characteristics based on their structure and the functions they must perform.
In particular, geosynthetics for drainage are composed of 2 different elements:
- Homogeneous: printed with a particular profile that promotes drainage capacity. Especially useful in those cases where the product must be positioned in direct contact with flat surfaces (such as retaining walls and foundations).
- compositi: made by coupling one or more geotextile filters, with an internal core with a high void ratio. In this case we are talking about geocomposites for drainage (like ours SINDRAIN). Draining geocomposites combine the Drainage function with other functions, such as the filtration , separation, thanks to their structure composed of multiple materials. This makes them versatile and effective solutions in many engineering and environmental situations.
How drainage geocomposites are made
During production, drainage geocomposites are combined with a layer of geonet, geomat, or other molded element (with a drainage function). This layer is then sandwiched between two layers of drainage geotextile with a filtering effect, preventing soil particles from clogging the core, which is essential for conveying and disposing of captured water.
To meet specific needs, some drainage geocomposites combine a single drainage geotextile or a breathable and/or waterproofing membrane with the geonet.
Regarding the overall thickness of drainage mats, this value can vary between 5 and 30 mm. It must be said, however, that – for the correct transmission of fluids – studying the behaviour of these products under load over time is of fundamental importance.
Drainage geosynthetics, in fact, are sensitive to overlying loads that can reduce their thickness. In particular, their behavior is influenced by mechanical factors (in the short term) and by viscous phenomena (in the medium to long term).
The main functions of drainage geocomposites
- Drainage: to collect and expel rainwater, groundwater or other water sources, in a safe and effective manner;
- Filtration: to ensure the correct passage of water into the soil, without the loss of particles or soil;
- Separation: to perfectly isolate the layers of soil, preventing them from mixing together.
Fields of application
Drainage geocomposites are engineering materials used in a wide range of applications due to their ability to provide drainage and moisture control . Here are some of the main fields of application:
Roads and Highways: Placed under the road surface to prevent water accumulation that could damage the road structure.
Railways: Used to improve the stability of railway terrain, ensuring effective drainage and preventing water accumulation.
Bridges and viaducts: Used to manage rainwater and prevent erosion and damage to supporting structures.
Environmental Engineering Works
Landfills : Used to manage leachate, preventing groundwater contamination and ensuring the stability of the landfill cover.
Erosion control systems : installed on slopes and embankments to control erosion and improve soil stability.
Soil remediation projects : Used to remove excess water and control the migration of contaminants.
Building foundations : Placed around the foundation to prevent water accumulation and improve structural stability.
Green roofs : Used to drain excess water from green roofs, preventing structural damage and improving stormwater management.
Retaining walls : Applied behind retaining walls to reduce water pressure and prevent wall deterioration.
Hydraulic Works and Irrigation
Canals and basins: used to control the flow of water and prevent erosion of banks.
Irrigation systems : Used to improve water distribution and prevent excessive accumulation in specific areas.
Gardens and green areas: used to improve soil drainage and prevent waterlogging problems that can damage plants.
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