Drainage Net

The 3D composite drainage net and geotextile are used in combination to form a complete “reverse filtration—drainage—protection” effect. It is currently the most ideal drainage geosynthetics.

The 3D composite drainage net is a new type of drainage geosynthetic, which is made of high-density polyethylene (HDPE) through a special extrusion molding process. It has a three-layer special structure. The ribs in the middle are rigid and arranged vertically to form a straight drainage channel in the drainage direction. The ribs on both sides are arranged in a cross to increase the overall stability of the drainage network.


1. Strong drainage capacity (equivalent to one meter thick gravel drainage)

2. Can bear high pressure load for a long time (can bear compression load greater than 3000Kpa)

3. High tensile strength

4. Reduce the chance of geotextile embedding in the mesh core and maintain long-term stable water conductivity

5. Corrosion resistance, acid and alkali resistance, long service life

6. Convenient construction, shorten construction period and reduce cost

Drainage Net Specifications

PropertyUnitBC63/D200BC70/D200BC80/D200BC90/D200Test Standard
Drainage Net Specification
Hydraulic conductivity (MD)m2/s2.8×10-33.2×10-34.0×10-3x10-3 ASTM D4716
 Puncture Resistance KN/m 0.17 0.17 0.17 0.17 ASTM D7005
Core Material Geonet Specification
Thicknessmm6.3789ASTM D5199
 Densityg/cm-3 0.94 0.94 0.940.94 ASTM D1505
 Carbon Black Content % 2 2 2 2 ASTM D1603
 Tensile strength (MD) kN/m 810 12 14ASTM D7199
 Hydraulic conductivity (MD)m2/s810 1214ASTM D4716
Geotextile Specification
Unit weightg/m2 200200200200 
Geotextile type      Continuous filament non-woven geotextile

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