Cantilever Concrete Retaining Wall Design

Assuming that the allowable bearing pressure of the soil is 120 knm 2 the.

Cantilever concrete retaining wall design.

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. Gravity retaining walls depend on their own weight and any soil resting on the concrete in resisting lateral earth forces. Building codes and retaining walls 5. 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.

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. Gravity poured concrete retaining walls. Pier and pile foundations 11. Cantilever walls restrain retained earth by the passive resistance provided by the soil below the excavation.

Cantilever walls cantilever wall design. Cantilever walls are walls that do not have any supports and thus have a free unsupported excavation. The base is divided into two parts the heel and toe. Soil bearing and stability 8.

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. There are eight geometric and four structural design variables for the reinforcement concrete cantilever retaining wall with the shear key as shown in fig. Soil mechanics simplified 4. Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider.

Forces on retaining walls 6. 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. Many engineers use the cantilever wall term to actually describe gravity walls. Retaining wall retains earth when level difference exists between two surfaces.

Design procedure overview 3. Counterfort retaining walls 12. Designing the cantilever wall stem 9. The stem may have constant thickness along the length or may be tapered based on economic and construction criteria.

They are generally economical up to 10 feet in height for cast concrete structures. 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. Counterfort retaining walls are more economical than cantilever walls for heights above 25 ft.