Software such as mathcad or excel will be useful for design iterations.
Concrete cantilever retaining wall design example.
The coefficient of friction between the footing and foundation soil k 1 is 0 25 and the allowable soil bearing pressure.
30 unit weight of soil ɣ s.
X σ m v σ m h σ v 128 95 52 33 19 86 ft.
Design stem tstem asstem.
Ce 537 spring 2011 retaining wall design example 3 8 3.
Design the reinforced concrete masonry cantilever retaining wall shown in figure 2.
Cantilever retaining walls can be precast in a factory or formed on site and considered economical up to about 25 ft in height.
The following design assumptions were made.
E actual e max extreme iia.
C 0 φ 30 degrees.
Ce 437 537 spring 2011 retaining wall design example 3 8 3.
X σ m v σ m h σ v 101 50 49 38 17 12 ft.
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.
Unit weight of concrete ɣ c.
Conditions and wall geometry n a design example which demonstrates the use of the australian standard and analysis method n analysis of cohesive soils.
Soil bearing capacity q all.
1 2 example wall.
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.
Unit weight of water ɣ w.
Example 11 cast in place concrete cantilever retaining wall 6 2020 eccentricity overturning check maximum eccentricity limit.
Coefficient of soil friction ф.
Port hills loess strength parameters.
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.
Consider the cantilever retaining wall with the cross section shown in the above figure a 1 which retains a 2m depth of soil having the groundwater table at 1 0m level.
The stem is a vertical cantilever beam acted on by the horizontal earth pressure.
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.
Assume level backfill no surcharge or seismic loading active earth pressure and masonry laid in running bond.
Figure a 1 retaining wall cross section.
Design stem t stem as stem.
The example calculations are made here using mathcad.
Aashto 10 6 3 3 strength ia.
The example wall is shown in figure x 2.
E 10 0 2 3 86 ft.
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 wall is assumed to be located in the christchurch port hills.
The stem is a vertical cantilever beam acted on by the horizontal earth pressure.
E max b 3 ft.