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.
Cantilever concrete retaining wall design.
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.
Overview of the design of cantilever retaining walls including the typical loads lateral soil pressures stability analysis and member design.
Counterfort retaining walls are more economical than cantilever walls for heights above 25 ft.
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.
There are eight geometric and four structural design variables for the reinforcement concrete cantilever retaining wall with the shear key as shown in fig.
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.
Forces on retaining walls 6.
The stem may have constant thickness along the length or may be tapered based on economic and construction criteria.
Many engineers use the cantilever wall term to actually describe gravity walls.
Assuming that the allowable bearing pressure of the soil is 120 knm 2 the.
Pier and pile foundations 11.
Cantilever walls are walls that do not have any supports and thus have a free unsupported excavation.
Gravity poured concrete retaining walls.
Counterfort retaining walls 12.
Based on our example in figure a 1 we have the forces due to soil pressure due to water and surcharge load to consider.
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.
The base is divided into two parts the heel and toe.
Designing the cantilever wall stem 9.
Cantilever walls cantilever wall design.
Building codes and retaining walls 5.
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.
Retaining wall retains earth when level difference exists between two surfaces.
Gravity retaining walls depend on their own weight and any soil resting on the concrete in resisting lateral earth forces.
They are generally economical up to 10 feet in height for cast concrete structures.
Cantilever walls restrain retained earth by the passive resistance provided by the soil below the excavation.