Honeycombed and textured membrane
One of the most important conditions on which the operational safety and longevity of a tunnel depends is to keep harmful underground water away from the inner lining and the traffic space. Consequently, drainage layers must be highly efficient and long-lived. For this application, Dorken has developed a special drainage sheet, DELTA®-AT 1200/800, which features not only maximum chemical stabilisation but also outstanding robustness and stability, a square weight of 1200g/m2, and an extremely high compressive strength of 950kN/m2. Capable of handling large volumes of water, this high-performance drainage sheet is ideal for highly exposed areas thanks to its drainage capacity of 3.51/s m at I = 1.