Gabion revetments are constructed to stabilise surface slips on embankments or as a method to prevent rock falls on escarpments, they do not normally provide stability to the slope against deep slip failures or for normal retaining stability.
Where retaining structures require a steepened berm (i.e. the internal angle of friction of the retained soil is less than the slope angle above the gabion walling), a steepened revetment can be provided. However, the active soil thrusts must be computed for the overall height in determining the gabion wall section.
Soils must be adequately compacted behind each course as part of each gabion bears onto the soil backfill, if this is not carried out settlement of the structure will occur. |
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