Soil Pressure Acting Concrete Retaining 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.

Soil pressure acting concrete retaining wall. That is why soil lateral earth pressure is a major concern in the design. 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. The resultant force due to the earth pressure acting on a basement wall can be calculated as. Load combinations for concrete retaining walls supporting sound walls or containing ground anchors have slightly different load combinations than other standard ers.

Retaining walls are used for supporting soil laterally so that it can be retained at different levels on the two sides. It can be constructed from different materials such as concrete stone and masonry units. Soil pressure acting on the concrete retaining wall is represented as a loading w per foot length of wall. Hence pa 1 1 2 ɣk a h 2 eq.

W 200 lb ft a 2ft b 12ft c 6ft gamma 150 lb ft2. 1 where h is the height of retained soil. 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. 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. However as you noted the soil load is reduced because the effective weight of the soil is reduced due to buoyant forces. One large concrete block or multi layer blocks lock block.

Static soil pressure total soil pressure 1 3. The main purpose of retaining wall construction is to retain soil. F a 0 5 k γ h s 2 1a where. The hydrostatic pressure and the soil load act on the wall concurrently.

Lateral earth pressure acting on retaining wall. See below answer for more about that. 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.