Soil Pressure Acting Concrete Retaining Wall

Notice that the pressures acting on the wall are equivalent to the area triangle of the pressure distribution diagram.

Soil pressure acting concrete retaining wall.

F a 0 5 k γ h s 2 1a where. Sliding overturning and bearing forces shall be taken into consideration while this type of retaining wall structure is designed. Sliding soil wedge theory is the basis for most of the theories by which lateral earth pressure is computed. 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.

1 where h is the height of retained soil. One large concrete block or multi layer blocks lock block. Soil pressure acting on the concrete retaining wall is represented as a loading w per foot length of wall. 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.

Commonly gravity retaining wall is massive because it requires significant gravity load to counter act soil pressure. The hydrostatic pressure and the soil load act on the wall concurrently. Dynamic soil pressure in a rectangular shape as shown in figure 3. 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.

See below answer for more about that. Retaining walls are used for supporting soil laterally so that it can be retained at different levels on the two sides. 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. However as you noted the soil load is reduced because the effective weight of the soil is reduced due to buoyant forces.

Load combinations for concrete retaining walls supporting sound walls or containing ground anchors have slightly different load combinations than other standard ers. The main purpose of retaining wall construction is to retain soil. Static soil pressure total soil pressure 1 3. The resultant force due to the earth pressure acting on a basement wall can be calculated as.

Lateral earth pressure acting on retaining wall. 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. W 200 lb ft a 2ft b 12ft c 6ft gamma 150 lb ft2. It can be constructed from different materials such as concrete stone and masonry units.