Question $2[$Reinforced Retaining Wall$]$

$[50$ Marks$]$

A cantilever type reinforced concrete retaining wall is shown in Figure $2.$ The soil is well$-$

drained frictionless medium dense sand with the following properties:

Density, $18k\frac{N}{m^3}$

Angle of internal friction, $=30$

Safe bearing pressure Pmax $=200$kPa

The characteristic strengths of the materials in the retaining walls are:

Characteristic strength of concrete, $f_{cu}=25$MPa

Yield strength of reinforcement steel, $f_y=450$MPa.

Using SANS $0160$ and SANS $0100,$ perform the following calculations:

$2\mathrm{.}1$ Check the stability of the retaining wall and determine whether the stresses developing

below the base are acceptable.

$2\mathrm{.}2$ Design suitable reinforcement for the retaining wall.

$2\mathrm{.}3$ Use relevant design software to solve this problem $($meaning design an optimal retaining

wall that can be used, not necessarily the one given on Figure $2.$ The parameters on the

question remain$).$

Figure $2$: Retaining wall

USE PROKON TO DESIGN