Retaining Wall Reinforcement Design

This composite system provides stability to the retaining wall allowing architects to increase wall.
Retaining wall reinforcement design. Forces on retaining walls 6. Design the wall and base reinforcement assuming fcu 35 knm 2 f y 500 knm 2 and the cover to reinforcement in the wall and base are respectively 35 mm and 50 mm. Design procedure overview 3. Reinforced concrete cantilever retaining wall analysis and design aci 318 14 reinforced concrete cantilever retaining walls consist of a relatively thin stem and a base slab.
Soil mechanics simplified 4. Retaining wall retains earth when level difference exists between two surfaces. Building codes and retaining walls 5. 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.
F c 3000 psi fy 60 ksi o development of structural design equations. The base is divided into two parts the heel and toe. In this example the structural design of the three retaining wall components is performed by hand. A gravity wall h 3m masonry or stone b cantilever wall h 3m and h 6m c counterfort wall h 8m d buttress wall transverse stem support provided on front side e e bridge abutment additional horizontal restraint from bridge deck a gravity wall h 3m masonry or stone.
Earthquake seismic design 7. Soil bearing and stability 8. Recommended stem designs for reinforced cantilever retaining walls with no surcharge are contained in tables 1 and 2 for allowable stress design and strength design respectively. These design methods are discussed in detail in allowable stress design of concrete masonry tek 14 7a and strength design of concrete masonry tek 14 4a refs.
Reinforced soils can also be used as retaining walls if they are built as an integral part of the design and to act as an alternative to the use of reinforced concrete or other solutions on the grounds of economy or as a result of the ground conditions. 5000 400 a 700 400 2900 w w w s w b fa ka 1 sin 1 sin 1 sin 30 1 sin 30 1 0 5 1 0 5 1 3 active pressure pa ka h 1 3 19 5 4 34 2 kn m 2 sliding consider the forces acting on a. Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider. As shown by the blue box by adding a geosynthetic reinforcement to the soil the srw system becomes a composite system made up of the wall units the soil and the geogrid.
Two equations are developed in this section for determining the thickness reinforcement required. The stem may have constant thickness along the length or may be tapered based on economic and construction criteria.