Geotextile Dewatering Tubes
1.Strong solid-liquid separation: Permeable to water but leak-proof, efficiently trapping silt and producing clean effluent.
2.Fast dewatering and volume reduction: Sludge dries and solidifies rapidly, significantly reducing land occupation and transportation costs.
3.High strength and weather resistance: Tensile and tear resistant, acid and alkali resistant, UV resistant, and corrosion resistant.
4.Simple and environmentally friendly construction: Easy installation, no secondary pollution, suitable for various scenarios including rivers, sludge, and tailings.
Product Introduction:
Geotextile Dewatering Tubes, also known as geotubes, are large tubular containers made of high-strength permeable geotextile fabric. They work on a simple yet effective principle: allowing water to drain out through the fabric while trapping sediment, sludge, mud, and fine solid particles inside. Widely used for river dredging, coastal restoration, wastewater sludge treatment, mining tailings and pond sediment removal, these geotubes gradually dewater, consolidate and harden over time, greatly reducing volume, stabilizing waste material, and offering a cost-effective, environmentally friendly and easy-to-install solution for sediment containment and dewatering projects.
Product Parameters:
project | unit | CWGD50S | CWGD90/120 | CWGD90S | CWGD100S | CWGD120S-B | CWGD120S-C | CWGD130S | CWGD200S-C | |
Tensile strength-radial | kN/m | 55 | 90 | 90 | 100 | 130 | 130 | 130 | 220 | |
Tensile strength-Weft | 50 | 120 | 90 | 100 | 120 | 120 | 130 | 210 | ||
Strain elongation-radial | % | 16±1 | 12±1 | 9±1 | 10±1 | 10±1 | 10±1 | 10±1 | 12±1 | |
Extensional elongation-Weft | 10±1 | 8±1 | 8±1 | 8±1 | 8±1 | 8±1 | 8±1 | 8±1 | ||
Breakage strength at 2% elongation | warp direction | kN/m | 5/15 | 14/40 | 30/30 | 30/30 | 20/40 | 22/40 | 20/45 | 15 |
Breakage strength at 5% elongation | warp direction | kN/m | 14/33 | 38/90 | 75/75 | 75/75 | 80/100 | 84/40 | 80/110 | 90 |
mass area ratio | g/m² | 285 | 440 | 390 | 430 | 540 | 540 | 560 | 850 | |
Joint tensile strength | kN/m | 35 | 90 | 60 | 70 | 100 | 100 | 110 | 170 | |
Static Burst Strength (CBR) | KN | 5 | 10 | 10 | 13 | 15 | 15 | 16 | 22 | |
Dynamic perforation | mm | 10 | 8 | 12 | 12 | 10 | 10 | 11 | 8 | |
Equivalent aperture (0g0) | mm | 0.9 | 0.48 | 0.52 | 0.45 | 0.4 | 0.3 | 0.43 | 0.4 | |
Permeability (Q50) | L/m²/s | 200 | 40 | 20 | 15 | 12 | 6.5 | 15 | 15 | |
Ultraviolet resistance (500h strong storage rate ） | % | 90 | 90 | 85 | 85 | 85 | 85 | 85 | 85 | |
Product Applications:
Geotextile bags are made of high-strength, corrosion-resistant, and anti-aging geotextile fabric. They can be filled with locally sourced materials such as river sand, plain soil, and silt. Through layering and staggered construction underwater or on land, they form an integral cofferdam structure, widely replacing traditional earth-rock cofferdams and sandbag cofferdams. They are a commonly used temporary and permanent cofferdam solution in water conservancy, river, port, and tidal flat engineering.
I. Applicable Cofferdam Scenarios
1. Temporary Cofferdams for River Construction: During river dredging, bank protection repair, and bridge foundation construction, geotextile bags are used to form closed water-retaining cofferdams, isolating the internal and external water bodies and creating dry construction conditions. They can be directly laid and constructed on deep water and silty soft foundations, without the need for large cofferdam equipment, and construction is not affected by water levels.
2. Port and Coastal Cofferdams: Used for port area embankments, wharf breakwaters, and tidal flat reclamation. Resistant to seawater corrosion and wave action, with strong structural integrity, it is not easily collapsed or leaked by waves. It can be later converted into a permanent revetment by covering with soil.
3. Diversion and Retention Cofferdams: In river diversion, water conservancy diversion, and water diversion projects, geotextile bags are used to quickly build dikes to separate and intercept water flow. The construction period is short, and the forming speed is much faster than traditional earth-rock cofferdams.
4. Water-Adjacent Cofferdams for Foundation Pit: For foundation pits near rivers and lakes, geotextile bags are used to construct water-adjacent retaining dikes to prevent backflow of external water. They offer good seepage prevention, uniform settlement, and are suitable for soft soil foundations, making them less prone to slippage and collapse.
II. Application Advantages
1. Convenient Construction, Underwater Operation: No complex formwork or large machinery is required. It can be used for water-based filling or on-shore stacking. Construction is possible in deep water, shallow water, and soft silt surfaces, resulting in a short construction period and high efficiency.
2. Strong Integrity, Seepage Prevention and Erosion Resistance: The stacked pipes interlock to form a stable structure, resistant to water flow and wave erosion, with minimal leakage and resistance to loosening and collapse.
3. Locally Sourced Materials, Lower Cost: Filling with nearby sand and river soil eliminates the need for large-scale stone transportation, saving on material and transportation costs, resulting in lower costs than traditional concrete and earth-rock cofferdams.
4. Wide Adaptability, Temporary or Permanent: It can be used as a temporary water-retaining cofferdam, which can be dismantled after completion; or it can be retained and reinforced as a permanent embankment or revetment structure, with aging resistance and a long service life.
5. Environmentally Friendly and Pollution-Free: The stable material does not pollute water bodies, and construction generates no construction waste, minimizing impact on river ecology and the aquatic environment.
In summary, geotextile bags, with their high strength and corrosion resistance, are widely used in various cofferdam projects, such as river construction, port and coastal areas, diversion and diversion, and foundation pits near water, by using locally sourced materials for filling and staggered stacking. They can quickly construct integrated water-retaining structures and create dry construction conditions, and have the advantages of convenient construction, seepage prevention and erosion resistance, cost-effectiveness, wide adaptability and environmental protection. They can be flexibly used as temporary cofferdams or permanent reinforcement structures, effectively replacing traditional cofferdam solutions and adapting to the cofferdam construction needs of multiple fields such as water conservancy and ports.
