Gravity Retaining Wall Design Example

Setback sliding wedge.

Gravity retaining wall design example.

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. For a detailed discussion of design and analysis parameters the design manual for segmental retaining walls ref. How retaining walls fail. The top width of the stem should be not less.

The wedge is defined as the soil which extends beyond the failure. 8 3 2 1 gravity retaining walls gravity wall dimensions may be taken as shown in fig 8 3 a. 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. Segmental retaining walls 17.

Ce 437 537 spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions. Walls formed from interlocking concrete blocks are designed as gravity walls defined in bs 8002 2015 as follows. Pilaster masonry walls 19. 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.

F c 3000 psi fy 60 ksi natural soil development of structural design equations. Soldier pile walls 22. 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. Every retaining wall supports a wedge of soil.

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. T i l e v er walls. Restrained non yielding walls 20. Flexural and shear stresses are checked in the second design example and it is seen that the magnitudes are very low.

Swimming pool walls 18. 1 should be consulted. In this example the structural design of the three retaining wall components is performed by hand. Wood retaining walls 14.

Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider. Pre sented in tabular form the designs are for wall heights. Two equations are developed. Gravity walls generally are trapezoidal in shape but also may be built with broken backs.

Cantilevered tilt up walls 13. 14 1 1 wall development process. Construction topics and caveats 24. The base and other dimensions should be such that the resultant falls within the middle one third of the base.

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. Weight of the concrete in a gravity wall pro vides stability against overturning.