The mass concrete retaining wall has cross section as shown in Fig $3$ above, is to be designed to resist a maximum active earth pressure of $87$kN$/$m run of the wall located at a third of the height from theCalculate the eccentricity $\text{'}$a$\text{'}$ of the resultant force and hence;base. The density of concrete is $23$ kN$/$m and the shear strength of the underlying clay, c $=46$kPa.$($a$)$ The maximum pressure under the toe $($point A$)$ of the retaining wall.$($b$)$ The minimum pressure under the heel $($polnt B$)$ of the retaining wall.$($c$)$ The factor of safety against base failure of the wall.$($d$)$ The factor of safety against horizontal sliding of the wall.

LUESTION $3$

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$241PM$

he mass concrete retaining wall has cross section as shown in Fig $3$ above, is to be designed to resist maximum active earth pressure of $87k\frac{N}{m}$ run of the wall located at a third of the height from the ase, The density of concrete is $23k\frac{N}{m^3}$ and the shear strength of the underlying clay, $c=46$kPa,

alculate the eccentricity $\text{'}e\text{'}$ of the resultant force and hence;

a$)$ The maximum pressure under the toe $($point A$)$ of the retaining wall.

b$)$ The minimum pressure under the heel $($point $B)$ of the retaining wall.

c$)$ The factor of safety against base failure of the wall.

d$)$ The factor of safety against horizontal sliding of the wall.

$\backslash$table$[[$Area$,$Ax$,],[0\mathrm{.}5,3\mathrm{.}5,],[,1\mathrm{.}73,13\mathrm{.}32]]$

$3\mathrm{.}2m$

ORTECAL