Forces on retaining walls 6.
Block retaining wall design example.
It is commonly used to separate drainage material from other soil.
Soil bearing and stability 8.
There are some great examples of block retaining walls in the photos below from basic cinderblocks to intricate masonry work.
Design procedure overview 3.
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.
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.
Wall thickness 12 in.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
Earthquake seismic design 7.
Gravity walls rely on their own weight and setback to hold up the soil behind them.
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 unitsconcrete blocks manufactured to provide an attractive durable stable face to a retaining wall.
For information into the basic concepts behind an allan block retaining wall design see page 18 of the ab spec book and best.
Soil mechanics simplified 4.
Take a look to see if you can make one of these styles work for your project.
Building codes and retaining walls 5.
Retaining walls built from boulders are practical and extremely effective.
The design process for a segmental retaining wall typically has a wall design engineer or site civil engineer responsible for the wall design envelope geotechnical engineers should be hired to evaluate the overall stability of the site.
Please note that the gravity wall chart provided has specific heights for specific site and soil conditions.
305 mm f m 1 500 psi 10 3 mpa assumed weights.
Boulder retaining wall ideas.
They are commonly h or double u configuration.
Assume level backfill no surcharge or seismic loading active earth pressure and masonry laid in running bond.
The coefficient of friction between the footing and foundation soil k 1 is 0 25 and the allowable soil bearing pressure is 2 000 psf 95 8 kpa ref.
Learn more about gravity wall construction.
Follow the block manufacturer s instructions for wall height limits.
Geotextilea permeable polymeric material which may be woven non woven or knitted.