Concrete Cantilever Retaining Wall Design Example

E actual e max extreme iia. 1 2 example wall. Concrete cantilever wall example.

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The coefficient of friction between the footing and foundation soil k 1 is 0 25 and the allowable soil bearing pressure.

Concrete cantilever retaining wall design example.

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 wall is assumed to be located in the christchurch port hills. Soil bearing capacity q all. Example 11 cast in place concrete cantilever retaining wall 6 2020 eccentricity overturning check maximum eccentricity limit.

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. Unit weight of concrete ɣ c. Assume level backfill no surcharge or seismic loading active earth pressure and masonry laid in running bond. E 10 0 2 3 86 ft.

Design stem tstem asstem. Cantilever retaining walls can be precast in a factory or formed on site and considered economical up to about 25 ft in height. 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. 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.

Aashto 10 6 3 3 strength ia. Ce 537 spring 2011 retaining wall design example 3 8 3. Ce 437 537 spring 2011 retaining wall design example 3 8 3. 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.

Conditions and wall geometry n a design example which demonstrates the use of the australian standard and analysis method n analysis of cohesive soils. E max b 3 ft. Design the reinforced concrete masonry cantilever retaining wall shown in figure 2. C 0 φ 30 degrees.

Coefficient of soil friction ф. X σ m v σ m h σ v 128 95 52 33 19 86 ft. Figure a 1 retaining wall cross section. 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.

The following design assumptions were made. 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. Design stem t stem as stem. The stem is a vertical cantilever beam acted on by the horizontal earth pressure.

The example wall is shown in figure x 2. 30 unit weight of soil ɣ s. Port hills loess strength parameters. Unit weight of water ɣ w.

Software such as mathcad or excel will be useful for design iterations. 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 example calculations are made here using mathcad. The stem is a vertical cantilever beam acted on by the horizontal earth pressure.

X σ m v σ m h σ v 101 50 49 38 17 12 ft.

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