Estimating Sheet

# How to calculate volume of concrete retaining wall

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This construction video tutorial is presented by learning technology. In this video, one can learn how to make volume calculation of retaining wall.

In the example provided in the video, the retaining wall is built upon a base slab. This retaining wall is known as stem.

The stem and base are the primary parts of a cantilever type of retaining wall. The toe belongs to the front portion and heel belongs to the back portion. The stem is supported at the base and the wall tapers around the top.

The length of the base remains among 0.4 to 0.7 times the height of the wall. Toe to base proportion should be 1:4. The thickness of the base slab is supposed to be little higher with regard to the depth of the stem at the bottom. The lowest thickness of the stem should have been 200mm for construction purposes.

The components of a retaining wall range from base slab footing, shear key, stem, construction joint.

In the video, the dimensions of the retaining wall is taken as follow :-

Length of the front is 20 m
Length of one side is 2 mm
Thickness is 200 mm
The height of the wall or stem constructed on the base is 5m
The width of the lower part of the wall is 500 mm
The width of the upper part of the wall is 200 mm

The base slab is represented as A and the wall is represented as B.
The following formula is used to calculate the volume of retaining wall :-
Volume of A + Volume of B
Volume of A = Length x Breadth x Height = 20 x 2 x 0.2 (after converting 200 millimeter to meter) = 8m3

To learn how to find out the volume of B, watch the following video tutorial.

Video Source: L & T - Learning Technology