Soil Pressure Acting Concrete Retaining Wall

Sliding soil wedge theory is the basis for most of the theories by which lateral earth pressure is computed.

Soil pressure acting concrete retaining wall.

It can be constructed from different materials such as concrete stone and masonry units. 1 where h is the height of retained soil. That is why soil lateral earth pressure is a major concern in the design. The main purpose of retaining wall construction is to retain soil.

The resultant force due to the earth pressure acting on a basement wall can be calculated as. The active pressure develops when the wall is free to move outward such as a typical retaining wall and the soil mass stretches sufficiently to mobilize its shear strength. Load combinations for concrete retaining walls supporting sound walls or containing ground anchors have slightly different load combinations than other standard ers. See below answer for more about that.

Commonly gravity retaining wall is massive because it requires significant gravity load to counter act soil pressure. However as you noted the soil load is reduced because the effective weight of the soil is reduced due to buoyant forces. Retaining walls are used for supporting soil laterally so that it can be retained at different levels on the two sides. Typical retaining walls a gravity type stone retaining wall a gravity wall relies solely on its mass and geometry to resist the soil pressure forces acting on it.

On the other hand if the wall moves into the soil then the soil mass is compressed which also mobilizes its shear strength and the passive pressure develops. Soil pressure acting on the concrete retaining wall is represented as a loading w per foot length of wall. One large concrete block or multi layer blocks lock block. Sliding overturning and bearing forces shall be taken into consideration while this type of retaining wall structure is designed.

Static soil pressure total soil pressure 1 3. Dynamic soil pressure in a rectangular shape as shown in figure 3. Hence pa 1 1 2 ɣk a h 2 eq. If concrete has a specific weight gamma per foot length determine the magnitudes of the soil distribution w1 and w2 and the frictional force f for equilibrium.

F a resultant force acting on the basement wall kn h s height of backfill soil m γ specific weight of backfill soil kn m 3 k coefficient of earth pressure at rest. A retaining wall is a structure designed and constructed to resist the lateral pressure of soil when there is a desired change in ground elevation that exceeds the angle of repose of the soil. W 200 lb ft a 2ft b 12ft c 6ft gamma 150 lb ft2. F a 0 5 k γ h s 2 1a where.