$20kNI{m}^3$

Base and front

Question

Check the stability $($overturning$,$ sliding, bearing capacity$)$ of the cantilever wall$-$backfill system, shown in the figure. and state if the selected dimensions are safe or not $($use Rankine's theory of earth pressure.

Solution

Data

Wall and soil dimensions

Huight of wall, $H=7\mathrm{.}5m$

Base thidoness, $0\mathrm{.}75$ m

Hed with $,0\mathrm{.}8$ m

Toe width, $3\mathrm{.}0$ m

Total base width, $7\mathrm{.}5$ m

Soil properties

Baekfell soil $($behind the wall$)$

Angle of internal finction, $Q_1=30$

Colesion, $C_1=0$

Clnet weeght, ${}_1=18k\frac{N}{m^3}$

Base and front soel

Angle of internal friction, $Q_2=20$

Colurian, $c_2=30kP$

Unit wieght, ${}_2=20k\frac{N}{m^3}$

Slope angle, $=15$