Composite Drainage Network

Composite drainage network (also known as three-dimensional composite drainage network, drainage grid) is a new type of drainage geomaterials. High density polyethylene (HDPE) is used as raw material and processed by special extrusion molding process. It has three layers of special structure. The middle bar is rigid and vertically arranged to form a drainage channel. The upper and lower cross-arranged bars form a support to prevent geotextiles from embedding in the drainage channel, and can maintain high drainage performance even under high loads. The composite use of double-sided adhesive permeable geotextile has the comprehensive performance of “reverse filtration, drainage, air permeability and protection”, which is the most ideal drainage material at present.

Composite Drainage Network Parameters

Composite Drainage Network Performance

Drain coreunitspecification
Mass area ratiog/㎡750100013001600
Thicknessmm5.06.07.07.6
Transmissivitym/sKX10-4KX10-4KX10-3KX10-3
Ductility%<50<50<50<50
Tensile strengthKN/m8101214
Geotechnical clothg/㎡200-200200-200200-200200-200