Why Geocell In roads , railways , sewers and slope applications , etc . during construction , sometimes we encountersoft and / or weak soils . The traditional way is to fill with expensive materials , which could be costlyand time consuming . However , there is an effective alternative method , by using geocell directly on the subgrade .geocell is made of ultrasonically-welded high density polythelene ( HDPE ) and can beexpanded to form honeycomb structure . Cells are then filled with readily available granular materialsand compacte.The Geocell solution means to challenge soil stability problems in lots of applications therougn the high-strength network of interconnected cells .