Gabion faced reinforced soil walls are a system when the structural stability is achieved by virtue of reinforcement layers of polymer geogrids or steel mesh. These polymer geogrids or steel mesh are placed in the soil linked to a facing skin of gabion. Gabion Retaining Wall Description Gabion basket retaining walls are a system when structural stability is achieved by virtue of reinforcement layers of polymer geogrids or steel mesh. These polymer geogrids or steel mesh are placed in the soil linked to a facing skin of gabion. What is a gabion basket retaining wall? The gabion basket retaining walls are monolithic gravity mass structures that are well suited for erosion control applications and follow standard design practices for gravity and MSE retaining walls. gabion retaining walls do not require a concrete foundation. For heavier materials, double-wide foundation gabions can be used under the main structure to improve wall stability. As with the mass of gravity walls, the gabion face is inclined at 6 degrees to the vertical and/or stepped. Reinforced Gabions Wall Cost: This type of structure costs less for walls 3 to 4m or more in height infill situations.