Block Retaining Wall Design Example

For information into the basic concepts behind an allan block retaining wall design see page 18 of the ab spec book and best. Assume level backfill no surcharge or seismic loading active earth pressure and masonry laid in running bond. It is commonly used to separate drainage material from other soil.

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305 mm f m 1 500 psi 10 3 mpa assumed weights.

Block retaining wall design example.

There are some great examples of block retaining walls in the photos below from basic cinderblocks to intricate masonry work. Take a look to see if you can make one of these styles work for your project. Retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance. Earthquake seismic design 7.

Retaining walls built from boulders are practical and extremely effective. Design procedure overview 3. Concrete masonry unitsconcrete blocks manufactured to provide an attractive durable stable face to a retaining wall. 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.

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. Building codes and retaining walls 5. Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider. Please note that the gravity wall chart provided has specific heights for specific site and soil conditions.

Design the reinforced concrete masonry cantilever retaining wall shown in figure 2. Boulder retaining wall ideas. 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. Soil bearing and stability 8.

Gravity walls rely on their own weight and setback to hold up the soil behind them. Wall thickness 12 in. Follow the block manufacturer s instructions for wall height limits. Forces on retaining walls 6.

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. 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. Learn more about gravity wall construction. Geotextilea permeable polymeric material which may be woven non woven or knitted.

They are commonly h or double u configuration. Soil mechanics simplified 4. Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.

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