Geosynthetic Composite Drainage Net 3D Plastic Geocomposite Drain
Net For Railway Drainage
Composite drainage net (also known as three-dimensional geotextile
drainage board, tunnel drainage board) is a new type of
geosynthetics, composed of a three-dimensional mesh core made of
high-density polyethylene (HDPE) and a double-sided permeable
geotextile. It has comprehensive properties such as high-efficiency
drainage, compression resistance, and filtration.
Structural composition
1. Three-dimensional mesh core
- It is composed of vertical ribs and upper and lower inclined ribs
to form drainage channels and support structures to prevent
geotextile embedding.
- The material is HDPE, containing carbon black ≥2%, tensile strength
≥36.5kN/m, and thickness is usually 5-7.6mm.
2. Geotextile
- It uses needle-punched non-woven fabric (short filament or long
filament), with a gram weight of 200-750g, a pore size of 0.18mm,
and a water permeability of 0.2cm/sec, providing anti-filtration
and protection functions.
| Item | Index |
| Composite Geonet |
| Denisty (g/cm3) | —— |
| Carbon Black Content (%) | —— |
| Longitudinal Tensile Strength (KN/m) | ≥16.0 |
Hydraulic Conductivity Longitudinal
(Normal Load 500kPa, Hydraulic Gradient 0.1) m2/s) | 3.0×10-4 |
| Peel Strength (KN/m) | ≥0.17 |
| Mass per Unit of Geotextile (g/m2) | ≥200
|
Key Features
1. Efficient drainage
Drainage capacity is equivalent to 1 meter thick gravel layer,
permeability 2500m/d (load 720kPa).
2. High strength and durability
Compressive strength reaches 3000kPa, and 60% thickness is retained
after creep test (load 1200kPa, 10000 hours).
3. Versatility
It has the functions of anti-filtration, drainage, isolation, and
foundation reinforcement, suitable for high load scenarios.
4. Corrosion resistance and convenient construction
Acid and alkali resistant, freeze-thaw resistant, shortening
construction period and reducing costs.
Main application areas
1. Traffic engineering
- Roadbed drainage: shorten the drainage path, reduce the amount of
foundation materials, and extend the life of the road.
- Tunnel drainage: block capillary water and prevent frost heave
damage.
2. Environmental protection engineering
- Landfill: drain leachate, groundwater and biogas, and protect the
anti-seepage membrane.
3. Water conservancy engineering
- Reservoir and slope protection drainage: prevent water pressure
from damaging the structure and enhance slope stability.
Construction points
1. Laying direction
The length of the material roll is perpendicular to the road, the
end connection is connected, and the overlap length is ≥2cm.
2. Fixing and connection
Use plastic buckles or polymer belts to connect every 3 feet, and
the overlap width of the geotextile is ≥200mm.
3. Environmental treatment
Clean up sharp objects on the site before laying, and protect the
membrane from puncture when used in combination with HDPE membrane.
Product specifications and selection
- Thickness: 5-7.6mm (mesh core), weight 600-1400g/㎡ (including
geotextile).
- Compressive strength: 250-1000kPa, can be customized according to
project requirements.
For more details, pls contact with Yixing Shenzhou.
