"Hao" product - Anti-clogging Drainage Net

Anti-clogging Drainage Mesh

Application pain points

Poor corrosion resistance 

The conventional drainage network has poor resistance to acid and alkali, and is prone to hydrolysis. When used in the leachate drainage systems of tailings ponds, red mud storage areas, and hazardous waste landfill sites, it is susceptible to corrosion by acid and alkali and thus may fail. 

The pore structure is prone to clogging. 

The conventional drainage network is relatively loose and has a large tension difference. After landfilling, the fine powder particles of the landfill materials invade the pores and the core of the network, causing the drainage channels to become blocked. 

The core of the net has poor pressure resistance. 

The conventional drainage network has large mesh sizes, an unstable core structure, and poor compressive strength. After being subjected to the weight of the landfill materials, it is prone to deformation, resulting in the narrowing or closure of the drainage channels.

产品核心优势

Core advantages of the product

1.Composite anti-seepage and blocking design

Gradient filtration mechanism: The geotextile fabric has high modulus, high tensile strength and anti-seepage properties. The surface pore size is ≤ 0.15 mm, which intercepts sediment while maintaining a permeability rate of ≥ 5.0×10-2 m2/s. 

2. High-pressure resistant drainage core

Three-dimensional rib structure: Compressive strength ≥ 830 kPa (ASTM D6364), deformation rate < 10%. Water drainage retention rate > 80% for 100 hours. 

3. Complete chemical tolerance

After 30 days of immersion in 10% sulfuric acid/NaOH solution, the retention rate of tensile strength was greater than 90% (according to ASTM D7238). Applicable environment: pH 2 to 12.

Product application fields

Civil Engineering and Infrastructure Construction 

1) Railway subgrade drainage: In soft soil or frozen soil areas, the drainage network is protected by anti-clogging structures to prevent fine-grained soil from clogging. It maintains drainage efficiency over the long term and avoids road base settlement caused by water accumulation. Its chemical corrosion resistance can withstand de-icing agents and underground salt erosion, thereby extending the lifespan of the road. 

2) Tunnel Engineering: In tunnel projects, the water contains a lot of sediment, and traditional drainage pipes are prone to clogging. The multi-layer gradient filtration design of the anti-clogging drainage net can intercept impurities, and at the same time, it releases water pressure through structural elasticity, and the core of the net has high compressive strength to adapt to the complex load conditions of the tunnel.

2. Environmental Engineering 

1) Drainage of leachate from solid waste landfill: The leachate contains high concentrations of organic matter and acidic substances, and ordinary drainage materials are prone to corrosion and failure. The anti-clogging drainage net is made of acid and alkali-resistant materials to resist chemical erosion, and the anti-clogging structure prevents sludge from adhering, ensuring the long-term stable operation of the leachate collection system. 

2) Soil pollution barrier project: A drainage network is embedded in the vertical anti-seepage wall, which utilizes its efficient water-conducting capacity to quickly discharge the contaminated groundwater and prevent the spread of pollutants.

3. Water Conservancy and Flood Control Projects 

1) Sea wall/river embankment protection: When exposed to saltwater or sediment for a long time, traditional drainage materials are prone to corrosion or clogging. The anti-acid-base and salt-spray resistance of the anti-clogging drainage net can adapt to harsh environments and reduce the frequency of replacement costs. 

2) Drainage of reservoir dam body: The interior of the earth-rock dam needs to be continuously drained to reduce pore water pressure. The anti-siltation design can prevent fine-grained soil from entering the drainage layer, reducing the construction cost of the backfill layer, and simultaneously lowering the risk of dam collapse.

4. Industry and Energy Sector 

1) Anti-seepage and drainage measures for petrochemical storage tanks: The leaked oil or chemicals are highly corrosive. The chemical inert material of the drainage network can withstand the erosion of oil, acids, and alkalis. Combined with the drainage system, it can quickly collect the leaked liquid, avoiding environmental pollution and reducing the cost of accident handling. 

2) Drainage of mine tailings reservoirs: The tailings slurry particles are extremely fine and prone to clogging the drainage facilities. The non-woven fabric composite layer of the anti-siltation drainage net can perform fine filtration. At the same time, its high water conductivity accelerates the solidification of tailings, reduces the risk of dam collapse, and saves the cost of reservoir capacity expansion.