Three dimensional composites drainage network consists of atri-dimension thick vertical rib, and a inclined rip on the top and bottom.

Double sided adhesive seepage geotextiles form a "filtration- drainage - ventilation - protection" overall performance, and can replace the traditional sand and gravel.

Its pure maintenance system can drain underground water quickly, block the capillary water under high load in construction, keep certain thickness and provide good water conductivity property.