geocells

Geocells are a type of cellular confinement system used to stabilize soils, reinforce slopes, and control erosion. They consist of three-dimensional, honeycomb-like grids that expand on site to form a network of interconnected cells. Most geocells are made from high-density polyethylene (HDPE) or other polymers, and are designed to be durable and UV-resistant in soil environments.

Installation begins with laying the geocell sheet on a prepared subgrade. The cells are then expanded and the joints between cells are sealed by heat welding or mechanical connectors to create a continuous matrix. Fill material, typically crushed stone, gravel, or soil suitable for the project, is placed inside the cells and compacted to the specified height. The confinement of the fill within the cells increases shear strength, limits lateral movement, and distributes loads over a wider area, while enabling drainage through the infill.

Common applications include slope stabilization and erosion control on highways, embankments, and riverbanks; channel and ditch lining; retaining structures; and load support for roads, parking lots, and temporary access routes. Geocells can also support vegetated or green installations when designed with appropriate soil mixes and planting.

Advantages of geocells include improved bearing capacity, reduced surface settlement, enhanced erosion resistance, faster installation, and potential material savings compared with traditional methods. They provide drainage and can facilitate revegetation. Limitations involve the need for proper design to accommodate local loads and climate, potential UV vulnerability prior to installation, higher upfront costs, and performance that depends on suitable fill material and ongoing maintenance.