E max b 3 ft.
Concrete cantilever retaining wall design example.
Unit weight of concrete ɣ c.
Concrete cantilever wall example.
Coefficient of soil friction ф.
Ft ft ft lb sur a sur ft ft lb fill o o a ft fill a p k q h psf p pcf k p k h h out of page 1 0 31 400 16 67 1 2070 0 31 100 16 67 1 4310 2.
Figure a 1 retaining wall cross section.
The stem is a vertical cantilever beam acted on by the horizontal earth pressure.
Unit weight of water ɣ w.
C 0 φ 30 degrees.
Cantilever retaining walls can be precast in a factory or formed on site and considered economical up to about 25 ft in height.
Assume level backfill no surcharge or seismic loading active earth pressure and masonry laid in running bond.
Ft ft ft lb sur a sur ft ft lb fill o o a ft fill a p k q h psf p pcf k p k h h out of page 1 0 31 400 16 67 1 2070 0 31 100 16 67 1 4310 2 1 0 31 1.
X σ m v σ m h σ v 101 50 49 38 17 12 ft.
Ce 437 537 spring 2011 retaining wall design example 3 8 3.
The example calculations are made here using mathcad.
E 10 0 2 3 86 ft.
The wall is assumed to be located in the christchurch port hills.
Design stem tstem asstem.
Example 3 16 design of a cantilever retaining wall bs 8 110 the cantilever retaining wall shown below is backþlled with granular material having a unit weight of 19 knm 3 and an internal angle of friction of 30.
The following design example briefly illustrates some of the basic steps used in the allowable stress design of a reinforced concrete masonry cantilever retaining wall.
Example 11 cast in place concrete cantilever retaining wall 6 2020 eccentricity overturning check maximum eccentricity limit.
Assuming that the allowable bearing pressure of the soil is 120 knm 2 the coefþcient of friction is 0 4 and the unit weight of reinforced concrete is 24 knm 3 1.
Design the reinforced concrete masonry cantilever retaining wall shown in figure 2.
X σ m v σ m h σ v 128 95 52 33 19 86 ft.
Conditions and wall geometry n a design example which demonstrates the use of the australian standard and analysis method n analysis of cohesive soils.
2 31 3 behaviour of reinforced concrete masonry cantilever retaining walls 1 4 importance of a geotechnical report 1 5 safety and protection of existing structures.
The coefficient of friction between the footing and foundation soil k 1 is 0 25 and the allowable soil bearing pressure.
Software such as mathcad or excel will be useful for design iterations.
30 unit weight of soil ɣ s.
This design example focuses on the analysis and design of a tapered cantilever retaining wall including a comparison with model results from the engineering software programs spwall and spmats.
Design stem t stem as stem.
Ce 537 spring 2011 retaining wall design example 3 8 3.
Port hills loess strength parameters.
The following design assumptions were made.
1 2 example wall.
Soil bearing capacity q all.
E actual e max extreme iia.
The example wall is shown in figure x 2.
