Geo Bags for Dredging
1. High cost-effectiveness:Saved a significant amount of transportation costs. Short construction period and low labor cost.
2. Environmentally friendly:It can perform closed dewatering treatment on polluted sludge to prevent the diffusion of pollutants during transportation and treatment.
3. Safe and reliable:The dehydration consolidation process is slow and stable, and the strength of the formed structure gradually increases, with a high safety factor. Flexible structures have good seismic performance and are less prone to brittle failure.
4. Space saving:Through efficient dehydration, the volume of a large amount of fluid waste can be significantly reduced, greatly saving the space required for subsequent disposal or landfill.
Product Introduction:
Geo Bags for Dredging are a large tubular bag made of high-strength geotextile (usually polypropylene or polyester material) woven as a registered trademark of a certain brand, but often used as a generic name.
Its core working principle is:
1. Filling: Fill the bag with a fluid mixture such as mud, sludge, or silt (usually mixed with water) through a pumping device.
2. Drainage: The special structure of geotextiles allows water to quickly seep out of the fabric gaps under pressure (filtering function), while effectively intercepting solid particles.
3. Consolidation: With the continuous discharge of water, the solid material inside the bag is gradually concentrated, dehydrated, compacted, and consolidated, ultimately forming a stable and strong solid structure.
Simply put, it uses "cloth bags" as molds and dehydration containers to achieve the purpose of separating mud and water and forming solids.
Feature
1. Strong customizability: Its diameter and length can be customized according to engineering requirements, ranging from less than one meter to several meters in diameter, and up to tens or even hundreds of meters in length.
2. High strength and durability: The geotextile used to make the tube bag has undergone special treatment and has extremely high tensile strength, puncture resistance, UV resistance, and chemical corrosion resistance.
3. Excellent filtration and drainage performance: The pore size of the fabric is precisely designed to quickly discharge free water and effectively prevent the loss of large amounts of small solid particles, achieving "only water, no mud".
4. Flexibility and adaptability: As a flexible structure, it can adapt well to uneven foundation terrain, with a large contact area with the foundation, uniform load distribution, and even settlement.
5. Easy and fast construction: mainly filled by hydraulic pumping, with high mechanization and fast construction speed, without the need for complex templates and large heavy machinery.
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:
1. Water conservancy engineering: flood control, bank protection, and river management
Function: Using stacked geotextile bags to form flood control embankments and bank protection slopes, replacing traditional earth and stone embankments and reducing soil excavation; Fill the dredging sludge of the river channel to achieve the integration of "dredging solidification bank protection".
2. Environmental engineering: sludge dewatering and solid waste disposal
Function: To treat sludge from municipal sewage treatment plants, industrial sludge (such as printing and dyeing sludge, chemical sludge), and dredging sludge. Through bag filtration and dewatering, the moisture content of the sludge is reduced from 80% -90% to 60% -70%, forming a stable sludge cake for subsequent landfill or resource utilization (such as brick making, soil covering and greening).
3. Marine and Port Engineering: Encircling the Sea for Land Reclamation and Dock Protection
Function: In the process of reclaiming land from the sea, temporary or permanent embankments (such as "pipe bag embankments") are constructed using geotextile bags to resist seawater erosion; In the repair of docks and breakwaters, geotextile bags filled with sand and gravel can be used as anti erosion cushions to protect the dock foundation.
4. Transportation engineering: roadbed reinforcement and soft foundation treatment
Function: In the treatment of soft soil foundations (such as silty soil and swamps) on highways and railways, geotextile bags are filled with sand, gravel or cement soil, buried in the foundation to form a "pipe bag composite foundation", which improves the bearing capacity of the foundation (the bearing capacity can be increased by 50% -100%) and reduces roadbed settlement.
5. Mining Engineering: Tailings and Slag Treatment
Function: To process mine tailings slurry (such as iron tailings and copper tailings), filter and dehydrate them through geotextile bags, intercept tailings particles, form a stable tailings dam, and prevent leakage and pollution of groundwater in tailings ponds; At the same time, the discharged clean water can be recycled for mining production, achieving water resource reuse.
In summary, as a new type of geotechnical material that is "efficient, economical, and environmentally friendly", the application scenarios of geotextile bags are still expanding (such as ecological restoration, landfill seepage prevention, etc.), and will play a more important role in green engineering and low-carbon construction in the future.
