... site, road base and the inside of the tunnel.Three-D drainage net (also called 3D geotechnical drainage board, tunnel ... road base and the inside of the tunnel. Three-D Drainage Net Technical Data Technical Data experimental technique units Type ... 1δv=20kPaISO12958l/m/s1.401.50a,b,c,d,eδv=100kPaISO12958l/m/s1.201.30a,b,c ... δv=500kPaISO12958l/m/s0.800.90a,b,c,d,e(KN/m)Tensile StrengthISO10319KN/m28.030.0a,b ...