TY - CONF A1 - Müller, Werner A1 - Wöhlecke, Andreas ED - Ziegler, M. ED - Bräu, G. ED - Heerten, G. ED - Laackmann, K. T1 - The performance of geocomposite drains in the long run T2 - 10th International conference on geosynthetics (Proceedings) N2 - Like all plastic products, geocomposite drains (GCD) are susceptible to creep and creep rupture. The GCD is slowly and continuously deformed under long lasting shear and pressure forces. The thickness is reduced and thereby the water flow capacity. If the in-plane deformation reaches a critical value in the course of time, shear failure might occur. Likewise, if the thickness reaches a critical value the structure of the drain core might collapse. These effects are shown using data provided by the manufacturers of four different GCD. Long-term water flow capacity and the acceptable limits of shear stress and normal stress (pressure) with respect to shear rupture and drain core stability as well as the lifetime with respect to these failure modes are determined using standard test methods. The design of long lasting geotechnical structures has to take into account these characteristics of the long-tem performance of GCD. T2 - 10th International conference on geosynthetics CY - Berlin, Germany DA - 21.09.2014 KW - Geocomposite drains KW - Creep KW - Creep rupture KW - Long-term water flow capacity KW - Long-term shear strength KW - Drain core stability PY - 2014 SN - 978-3-9813953-9-6 SP - 1 EP - 7 AN - OPUS4-31574 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -