Steep Slope Retaining and River Bank Stabilisation

Types of river bank stabalisation are as follows:-
  • Retaining walls
  • Soil and cement
  • Vegetations
  • Sacks and blocks
  • Mattresses and gabions
  • Windrows and trenches

There are three types of retaining walls and these are:-

  1. Sheet piling walls - easily installed and very workable
  2. Cantivlever walls - reinforced concrete is used and an anchor can be used for extra stability
  3. Gravity walls - the size of the structure helps prevent passive and active walls be resistan

Soil and Cement

  • Can be used in sandy soils when vegetation will not grow


  • Aesthetically pleasing
  • Great for habitat
  • Lowest cost for river bank protection measures


  • Filled with cement and soil mixture
  • Cobblestone affect does look good
  • Easier to place on steep slopes


  • Drainage through the openings of cast block
  • Vegetation can grow down through the holes in the blocks to strenghten the bank
  • Easy to walk over
  • Will move to suit small chnages in the bank shape

Mattress Gabions

  • Mattress gabions are tied together to protect the embankment
  • These are placed on a level graded riverbank slope
  • Natural vegetation will probably grow through


  • Gabions are rectangular wire baskets loaded with small stones
  • Gabions are used in corrosive environments and therefore are made from heavy galvanized steel coated with PVC.
  • Gabions are used to keep steep river banks stable
  • Gabions have a good record performance

Windows and Trenches

  • Windrows is stacking erosion resistant product on a river bank
  • Trenches are alike windrows but are buried so as not to be seen
  • Easier to install on steep slopes

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