Question

Design of Cantilever type retaining wall mainly dimensioning of retaining wall, design of stem and check for sliding.

Cantilever retaining wall to retain earth embankment 4.4 m high above ground level

Density of earth = 18 kN/m3

The embankment is horizontal at its top.

Angle of repose of soil = 30°

Safe bearing capacity of soil = 200 kN/m2

Coefficient of friction between soil and concrete = 0.7

Characteristic strength of concrete (fck) = 35 N/mm2

Characteristic strength of steel (fyk) = 500 N/mm2

Assume cover

Answer #1

A retaining wall has a stem height 8.5m and width is
0.5m from top and 1.4 from below. The base is 7.0x1.5m. the toe is
1.8m and the heel is 3.8m. the backfill is inclined by
15o. Ɣ=18KN/m3 and Φ=25
Find if the given retaining wall is stable against
sliding and overturning or not. Ɣ concrete =
24KN/m3. δ = 0.6
ɸ

a five meter retaining wall has to retain backfill of sandy soil
having a unit weight 18.2 kn/m3 and angle of internal friction 32
degree,the surface of the backfill in inclined at an angle of 10
degree to the horizontal determine:the magnitude and point of
application of the active thrust on the wall,draw a diagram of
given situation ,and determine total active earth pressure acting
with vertical or with horizontal.

Design a wall footing to support a 300 mm reinforced concrete
wall with dead load of 292KN/m and live load of 200 KN/m. The
bottom of the footing is 1.20 m below the final grade, the soil
weighs 15,700 N/m3. The allowable soil pressure is 190 Kpa. fy =
276.5 Mpa, fc’ = 27.6 Mpa.

) A reinforced earth retaining wall is to be 30 ft high (H=30
ft). - Backfill: unit weight 110 pcf, internal friction angle 33° -
Metal strip reinforcement: vertical spacing 3 ft, horizontal
spacing 4 ft, width of reinforcement 5”, yield stress of
reinforcement 35,000 psi, friction angle between the soil and
reinforcement is 24°, FS pullout failure = 2, FS tensile failure =2
- Assume ??′ = 2 3??′ - Corrosion rate: 0.0006 in/year for the 1st
2 year...

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