Why is gabion apron necessary for gabion retaining wall to retain river embankment?
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Gabion aprons are provided at gabion walls to protect its toe from scouring due to river flow. The scouring would eventually lead to undermining of the gabion structure and affects its structural stability. The length of gabion apron should be long enough such that it reaches beyond the limit where scouring may form. A layer of getextile filter is normally placed at the base of gabion structures to prevent leaching out of foundation soils.
This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.
