Retaining Wall Design Example With Surcharge Load

Retaining walls generally have little vertical load other than self weight and weight of any soil on a footing.

Retaining wall design example with surcharge load. Design procedure overview 3. A wall number is assigned as per criteria discussed in. Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider. It will increase the pressure on the retaining wall.

Surcharge loads acting on retaining wall surcharge loads acting on retaining walls are additional vertical loads that used to the backfill soil above the top of the wall. Basement walls they are often buttressed by return walls and floor diaphragms which may make them too stiff for active soil pressures to develop requiring higher design loads and a different design approach. Prior to completing any retaining wall design it is first necessary to calculate the forces acting on the wall. Retaining wall to support a fill.

Each of these walls must be designed to resist the external forces applied to the wall from earth pressure surcharge load water earthquake etc. Retaining wall to support a cut. However this isnt the case if the retaining wall is. Retaining walls example 3 16 design of a cantilever retaining wall bs 8 110 the cantilever retaining wall shown below is backþlled with granular material having a unit weight of 19 knm 3 and an internal angle of friction of 30.

1 1 possible modes of failure. Forces on retaining walls 6. The unanticipated load could lead to failure of the retaining wall. It can be either dead loads for example sloping backfill above the wall height or live load which could result from the highway or parking lot paving or adjacent footing.

Soil mechanics simplified 4. Building codes and retaining walls 5. For example one might construct a building close to the retaining wall. Retaining wall design example with surcharge load.

Retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance. 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. Retaining wall development is described in section 11 55 5 of the. Soil bearing and stability 8.

Possible modes of failure for free standing concrete cantilever retaining walls are illustrated. However this isnt the case if the retaining wall is. The live load surcharge is positioned to produce the maximum design load. Usually retaining walls are designed for some surcharge loads depending on the design requirement.

Assuming that the allowable bearing pressure of the soil is 120 knm 2 the. Wisdot regional staff determines the need for permanent retaining walls on highway projects.