Composite drainage network is a material commonly used in landfill, subgrade, tunnel inner wall, railway and highway projects. So, what exactly is its principle?
1. Structural composition of composite drainage network
Composite drainage net is a new type of drainage geotechnical material, which is composed of three-dimensional plastic net and permeable geotextile bonding on both sides. Its core structure includes two layers of plastic mesh core and geotextile.
1、Plastic mesh core: The plastic mesh core is generally made of high-density polyethylene ( HDPE） It is made of polymer materials and has a three-dimensional structure. This structure allows many drainage channels to be formed inside the mesh core, which can quickly guide the water flow to discharge. The plastic mesh core also has high compressive strength and durability, and can withstand long-term heavy loads without deformation.
2、Geotextile: Geotextile is a geosynthetic material with good water permeability and reverse filtration properties. It is glued to the surface of the plastic mesh core and acts as a filter and drainage. Geotextile can prevent dirt particles from passing through, prevent drainage channels from being blocked, and also allow moisture to pass freely, keeping the drainage system unblocked.
2. Working principle of composite drainage network
The working principle of composite drainage network is mainly based on its unique structural composition and physical characteristics. When water flows through the composite drainage network, it undergoes the following processes:
1、Filtration function: The water flow first passes through the geotextile layer. The geotextile uses its fine fiber structure to intercept impurities such as soil particles outside the drainage system to ensure the unimpeded drainage channel.
2、Drainage effect: The filtered water flow enters the drainage channel of the plastic mesh core. Because the plastic mesh core has a three-dimensional structure, the water flow can quickly diffuse and flow in it, and finally discharge through the drainage outlet.
3、Compression resistance: Under the condition of heavy load, the plastic mesh core of the composite drainage net can keep its structure stable and will not be deformed or damaged by pressure. Therefore, the composite drainage network can maintain stable drainage performance under various complex geological conditions.
3. Application effect of composite drainage network
1、Improve drainage efficiency: The three-dimensional structure and good water permeability of the composite drainage network allow it to quickly guide water flow and improve drainage efficiency. It can reduce the damage of accumulated water to the project and prolong the service life of the project.
2、Enhance the stability of the project: Laying the composite drainage network can disperse and transmit the stress in the project and enhance the stability of the project. It can prevent problems such as foundation settlement and pavement cracking.
3、Reduce maintenance costs: The composite drainage net has very good durability and compression resistance. It can maintain stable drainage performance during long-term use and reduce maintenance times and costs.
Post time: Apr-25-2025
