Structural and geotechnical design of modular geocellular drainage systems

Stormwater attenuation and infiltration tanks constructed using modular plastic geocellular units are commonly used as part of sustainable drainage and rainwater harvesting systems. These plastic products have proven to be an effective solution for many projects and as a result of this success the scale of applications has dramatically increased in recent years. This guide discusses the different types of geocellular unit available and provides guidance on the testing that should be carried out to determine their strength and deformation characteristics, the geotechnical and structural design and behaviour of the units and assemblages, practical issues affecting installation and construction works, and maintenance of the installations. Recommendations for the design methodology to be followed are included, together with worked examples, which is consistent with the requirements of the Eurocodes.