QUESTION $2[25$ MARKS$]$

The cantilever retaining wall shown in Figure $2$ is filled with granular material having a unit weight $=19k\frac{N}{m^3}$ and an angle of internal friction, $\frac{O}{?}=29.$ Assume the allowable bearing pressure of the soil is $150k\frac{N}{m^2},$ sliding friction coefficient is $0\mathrm{.}577$ and the unit weight of reinforced concrete $=24k\frac{N}{m^3}.$ Weep holes are provided behind the wall.

$1$

RCD$2601$ MAJOR TEST $32024$

Given:

Concrete characteristics strength, fcu$=25$MPa

Reinforcement steel yield strength, fy $=450$MPa

Use Cover to reinforcement $=40mm$ and Y$20$ reinforcement bars for effective depth Use the relevant Code of Practice to do the following:

$2\mathrm{.}1$ Determine the factors of safety against sliding and overturning.

$(15$ marks$)$

$2\mathrm{.}2$ Calculate ground bearing pressure.

$(5$ marks$)$

$2\mathrm{.}3$ Determine the main flexural reinforcement bar for the stem of the wall.

$(10$marks

Figure $2$: Cantilever retaining wall

Please help asap