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What Is a Geotextile Tube (Geotube)?

What Is a Geotextile Tube (Geotube)?

What is a geotextile tube? A geotextile tube (geotube) is made from non-woven or woven geotextile, in either polyester (PET) or polypropylene (PP), and shaped like a very large sack. Geotextile tube sizes vary, reaching 15 to 30 metres as required, and the tube can be filled with aggregate, sand or soil.

*Main materials used to make geotubes

Woven and non-woven geotextile used to make geotubes
Woven Geotextile / Non-Woven Geotextile

Large geotextile tube filled with sand on site

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Woven Geotextile

Geotextile tubes are often used as cushions in place of rock for protecting coastlines, riverbanks or slopes. It is common to see them along the coast, where they are usually placed on land or in shallow water.

Geotextile tube protecting a beach from coastal erosion

Besides coastal erosion control, it is used to resist scouring by water currents, and can also serve as a breakwater, for coastal reclamation, and as a dewatering tube.

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Non-Woven Geotextile

» The advantages of using it are as follows:  

  • Size can be made to order.
  • It retains soil particles while allowing water to drain out.
  • Excellent long-term durability.
  • Good UV resistance.
  • Can be filled with local material.
  • Very efficient at dampening sea waves.

A geotextile tube controls erosion by retaining the soil or sand inside it, while water can flow out without carrying that soil or sand with it. For this reason it is usually filled with non-cohesive soil, meaning soil with little or no bonding between its grains (containing almost no clay, such as sand).