Cantilever Concrete Retaining Wall Design

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.

Cantilever concrete retaining wall design.

Cantilever walls restrain retained earth by the passive resistance provided by the soil below the excavation. Building codes and retaining walls 5. Forces on retaining walls 6. Soil bearing and stability 8.

Overview of the design of cantilever retaining walls including the typical loads lateral soil pressures stability analysis and member design. Designing the cantilever wall stem 9. Retaining wall retains earth when level difference exists between two surfaces. Counterfort retaining walls are more economical than cantilever walls for heights above 25 ft.

Pier and pile foundations 11. Gravity poured concrete retaining walls. Cantilever walls are walls that do not have any supports and thus have a free unsupported excavation. Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider.

There are eight geometric and four structural design variables for the reinforcement concrete cantilever retaining wall with the shear key as shown in fig. They are generally economical up to 10 feet in height for cast concrete structures. Geometric design variables were chosen with reference to geometry of the wall and structural design variables were modelled concerning to the critical sections of the wall. Counterfort retaining walls 12.

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. Cantilever walls cantilever wall design. 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. Earthquake seismic design 7.

Soil mechanics simplified 4. 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. Design procedure overview 3. The base is divided into two parts the heel and toe.

Many engineers use the cantilever wall term to actually describe gravity walls. 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. The stem may have constant thickness along the length or may be tapered based on economic and construction criteria.