Gravity Retaining Wall Design Example

Pilaster masonry walls 19.

Gravity retaining wall design example.

Construction topics and caveats 24. A retaining wall that relies solely on it s own weight to stand up is called a gravity wall allan block combines the basic engineering principles of setback leverage and total unit mass with simple mechanics to make highly stable gravity walls. Retaining walls such as mse walls with precast concrete panel facing that are susceptible to damage from vehicular impact shall be protected by a roadway barrier. Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider.

For a detailed discussion of design and analysis parameters the design manual for segmental retaining walls ref. Wood retaining walls 14. Restrained non yielding walls 20. 1 should be consulted.

14 1 1 wall development process. Pre sented in tabular form the designs are for wall heights. Although wall heights up to 8 ft 2 44 m for conventional gravity walls and 14 ft 4 28 m for soil reinforced walls are presented properly engineered walls can exceed these heights. 6 foot 1 8 m high gravity retaining wall equivalent fluid pressure of soil 40 pcf 7 1 kn m soil weight 100 pcf 15 7 kn.

The base and other dimensions should be such that the resultant falls within the middle one third of the base. Cantilevered tilt up walls 13. Segmental retaining walls 17. Weight of the concrete in a gravity wall pro vides stability against overturning.

T i l e v er walls. Soldier pile walls 22. The wedge is defined as the soil which extends beyond the failure. Ce 437 537 spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions.

F c 3000 psi fy 60 ksi natural soil development of structural design equations. Gravity walls generally are trapezoidal in shape but also may be built with broken backs. In this example the structural design of the three retaining wall components is performed by hand. Flexural and shear stresses are checked in the second design example and it is seen that the magnitudes are very low.

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. Setback sliding wedge. How retaining walls fail. Gravity retaining walls are earth retaining structures that depend primarily on their own self weight and that of any enclosed material to support the retained ground and any structures or loads placed upon it.

Two equations are developed. Flexural and shear stresses in gravity retaining walls will almost always be of minor importance. 8 3 2 1 gravity retaining walls gravity wall dimensions may be taken as shown in fig 8 3 a. Gravity retaining wall design can be greatly simplified t h r ough the use of a series of sample designs deve l o p e d recently by the po r tland cement association pca.

Every retaining wall supports a wedge of soil. Sheet pile walls 21.