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Gabion Wall Retaining Wall
Gabion retaining wall                systems are monolithic gravity mass structures that are well suited for erosion control applications and follow standard design methods for gravity and MSE retaining walls. There are many benefits to using a retaining wall system.     
 
Gabion Retaining Wall Design
Bottom width of gabion wall relative to wall height
The bottom width of a gabion gravity retaining wall is directly related to the height of the wall. As the wall height increases, the base of the wall must become wider to ensure structural stability. We have provided the chart below to illustrate a starting point for design analysis to determine the base width relative to the wall height. A conservative rule of thumb is base width = 2/3 wall height.     
 
General Design Considerations
Foundation Preparation
Gabion gravity retaining walls                are typically placed directly on a graded soil base. To increase bearing capacity, minimize uneven settlement, and/or allow for additional drainage, granular stone-filled base grades with consistent gradation ranging from 1/2" to 1-1/2" may be placed and compacted to the local standard of 6" - 18 " deep.     
Base Grades and Wall Surfacing Mastic
It was determined through the stability analysis that additional stability of the gabion gravity retaining wall may be required to achieve an acceptable factor of safety for sliding. Prior to expanding the gabion wall cross-section for additional stability, it may be an option to excavate and bury half of the first layer of baskets and then erect the gabion gravity retaining wall at a 5 - 6 degree angle toward the retained slope. This will require grading and compaction of the foundation soil to accommodate the specified wall batter.     

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