Soil Pressure Acting On The Concrete Retaining Wall

F a 0 5 k γ h s 2 1a where.

Soil pressure acting on the concrete retaining wall.

Separated into two components the static active soil pressure in a triangular shape and the. The main purpose of retaining wall construction is to retain soil. Lateral earth pressure acting on retaining wall. Soil pressure acting on the concrete retaining wall is represented as a loading w per foot length of wall.

1 where h is the height of retained soil. Sliding soil wedge theory is the basis for most of the theories by which lateral earth pressure is computed. One large concrete block or multi layer blocks lock block. Load combinations for concrete retaining walls supporting sound walls or containing.

In the analysis of retaining walls subjected to earth pressure it is very common to observe trapezoidal load distribution on the walls. However the active earth pressure condition will be reached only if the wall is allowed to yield sufficiently. Normally earth pressure on a retaining wall is assumed to adopt a triangular load distribution but due to surcharge which is usually assumed to act on the ground surface the top of the wall experiences some degree of lateral pressure. 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.

Retaining walls are used for supporting soil laterally so that it can be retained at different levels on the two sides. Hence pa 1 1 2 ɣk a h 2 eq. 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 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.

That is why soil lateral earth pressure is a major concern in the design. The resultant force due to the earth pressure acting on a basement wall can be calculated as. The amount of outward displacement of the wall necessary is about 0 001h to 0 004h for granular soil backfills and about 0 01h to 0 04h for cohesive backfills. 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.

W 200 lb ft a 2ft b 12ft c 6ft gamma 150 lb ft2. 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. Notice that the pressures acting on the wall are equivalent to the area triangle of the pressure distribution diagram.