1. When the load is 720kPa and the gradient is 2%, the permeability is 2500m / d and the flow rate is 13 pm/m.
2. The creep test retains a thickness of more than 60% after 1200kPa load for 10,000 hours.
3. The carbon black content of the three-ribbed drainage mesh core is not less than 2%, the density is 0.94g / cm3, the tensile strength is not less than 36.5kN / m, the melting index is 1.0 g / 10min, and the thickness is 7.6mm.
4. Apparent aperture of non-woven geotextile 0.18mm, water permeability 0.26 Sec-1, permeability 0.2cm / sec, puncture strength 580N, trapezoidal tear strength 356 N, grip tensile strength 900 N, grip extension strength 50%, strength 2750kPa.