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.
Block retaining wall design example.
Assume level backfill no surcharge or seismic loading active earth.
Design relationships table 1 summarizes the influence of increasing the wall batter increasing the unit width increasing the unit s in place density and using better quality backfill on the maximum.
H x 8 in.
Buy 378 or more 1 15.
Retaining walls built from boulders are practical and extremely effective.
Traditional retaining wall solutions can be expensive and restrictive for example cast in situ construction is slow and expensive to build and precast retaining wall panels are restricted in height.
Earthquake seismic design 7.
If you are not sure of your site conditions we recommend being conservative with your retaining wall heights or use geogrid in your retaining wall.
Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider.
Concrete masonry units concrete blocks manufactured to provide an attractive durable stable face to a retaining wall.
Sketches of the retaining wall forces should be considered to properly distinguish the different forces acting on our retaining wall as tackled in the previous article retaining wall.
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Building codes and retaining walls 5.
Gravity walls rely on their own weight and setback to hold up the soil behind them.
Retaining walls which set out a design methodology and safe load tables for these structures.
Boulder retaining wall ideas.
Follow the block manufacturer s instructions for wall height limits.
D tan charcol concrete retaining wall block 378 piece pallet model 16253061 1 28 1 28.
Please note that the gravity wall chart provided has specific heights for specific site and soil conditions.
The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block.
Design procedure overview 3.
Let s take a fresh look and see how concrete interlocking blocks or more commonly known as concrete lego blocks can be used as the solution.
Forces on retaining walls 6.
There are some great examples of block retaining walls in the photos below from basic cinderblocks to intricate masonry work.
Design the reinforced concrete masonry cantilever retaining wall shown in figure 2.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
Learn more about gravity wall construction.
Oldcastle mini beltis 3 in.
Retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance.
W x 4 in.
Conditions and wall geometry n a design example which demonstrates the use of the australian standard and.
The weight of a building or another retaining wall above and set back from the top of the wall are examples of dead load surcharges.