The use of cellular confinement systems near trees – Good practice guide

Ben Rose

2020-01-01

The Arboriculture Association

Keywords: Cellular confinement systems, Tree root protection, Soil compaction, Geocells, Urban forestry, Soil structure, Water infiltration, Tree health, Surface stability

"A major concern of surfacing above a tree root zone is the impact that this would have on the availability of water and oxygen to the soil immediately beneath the surface. Soil aeration deficiencies result in reduced levels of tree root growth (Weltecke & Gaertig 2012) and so it is important that new surfacing above a tree root system maintains gas permeability at the soil-atmosphere interface. "

The article discusses the use of cellular confinement systems, specifically geocells, for protecting tree roots from soil compaction in urban areas where traditional sub-base methods are not feasible. It highlights how compacted soil can hinder root growth, impact soil structure and water infiltration, and ultimately affect tree health. By utilizing geocells filled with angular stone, a stable base near trees can be created, allowing for water permeability and gas exchange. The article emphasizes the importance of proper specification by civil engineers to ensure the durability and effectiveness of these systems in protecting tree roots while reducing material requirements for stabilization.

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Tags: Cellular confinement systems, Tree root protection, Soil compaction, Geocells, Urban forestry, Soil rehabilitation