Geotextile Tubes, Bags and Containers

Geotextile tubes and containers are large fabric structures filled with hydraulically pumped sand, dredged material, or slurry to form coastal protection structures, dewatering units, and land reclamation elements. Geotextile tubes (woven PP or PET, tensile strength 80–300 kN/m, O₉₀ 0.10–0.25 mm, diameter 1.5–5.0 m, length 25–100 m) are filled by hydraulic pumping, dewatering through the fabric to form stable sand-filled structures for breakwaters, groynes, and revetments at 30–50% lower cost than rock armour. Dewatering geotextile tubes (diameter 2–4 m, length 20–40 m) process 100–500 m³/hour of dredged slurry, producing dewatered cake at 25–35% solids content for disposal or land reclamation — used extensively for harbour maintenance dredging in Netherlands, USA, and Australia. Geotextile bags (50–3,000 kg fill capacity, woven PP, UV-stabilised) provide flexible erosion protection for seawalls, river banks, and scour protection around bridge piers at $20–80/m² installed cost. Geocontainers (large geotextile bags, 200–2,000 m³ capacity, PET woven carrier, tensile strength 100–400 kN/m) are bottom-dumped from split-hull barges for rapid underwater structure construction. Fill pressure monitoring during tube filling (internal pressure 15–25 kPa) prevents over-pressurisation and seam failure.