Calculation of force and bending moment due to earth pressure on a cantilevering wall

1.1

Design values :

0.3 g = 2.07 t/m2 2.525

1 2 0.279

1.458 t/m2 0.693 t/m2 0.300 m

Earth Pressure diagram

2.525 m

1)Earth Pressure due to surcharge equivalent to 1.2m of earthfill =

= 0.693 t/m2

2)Earth Pressure due to backfill of earth =

= 1.458 t/m2

Bending moment at the base of dirtwall due to earth pressure (1) =

= 2.209 t-m/m

Bending moment at the base of dirtwall due to earth pressure (1) =

= 1.952 t-m/m

Total bending moment at the base of wall = 4.162 t-m/mdue to earth pressure

ka =

width of dirtwall =

height of dirtwall,h =

ka *g*1.2

ka *g*h

ka *g*1.2*h2/2

ka *g*h3*0.42/2