Drainage geonets Flexible or collapsible

Release time：2025-10-24    Click：46

　　Drainage geonets may show high resistance to compression in the short term and might be prone to a sudden collapse in case the loads are maintained for a long period. It is therefore essential to evaluate, at the design level, in case the geonets core behaves as flexible or collapsible for the specific field conditions, i.e., utilized load, slope gradient, and design life.

　　The drainage volume of geocomposites is directly equivalent to the thickness of the geonets core. The reference value of the flow rate should therefore be determined just when the utilized loads and the geocomposites have reached an equilibrium and without more reduction of thickness and drainage volume. While flexible drainage materials achieve equilibrium in just a few hours, it is tougher for collapsible drainage materials to achieve equilibrium in compression.

　　How the reference value of the flow rate is determined will be based upon whether the geocomposites is expected to behave as flexible or collapsible.

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