These walls have upper end free and the lower end fixed. These walls are designed as cantilever beams. Maximum concrete and steel is provided near the base and uniformity decreased upward. The wall may be singly or doubly reinforced. The main reinforcement is provided on the inner face. Alternate bars are cut in size so as to decrease the area of reinforcement near the top. This cutting of bars at different levels is known as curtailed reinforcement.
■ Features of a RCC Retaining Walls.
1) These walls are economical upto 6.00 m. height
2) Top thickness is taken as 200 to 500 mm.
3) Base width b is kept 0.5 to 0.6 of the over all height of the wall.
4) Thickness of base slab is normally keptth of over all height.
5) Projection of toe is kept between 1/4 to 1/3 of base width.
6) Front face is kept vertical.
7) Inner face batter is 1 in 12.
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