The Constructor

Cantilever Retaining Wall – Functions and Design Considerations

Reading time: 1 minute

Cantilever retaining wall are usually of reinforced concrete and work on the principles of leverage. It has much thinner stem and utilize the weight of the backfill soil to provide most of the resistance to sliding and overturning. Cantilever retaining wall is the most common type of earth-retaining structure. It is constructed of reinforced Portland-cement concrete (PCC) was the predominant type of rigid retaining wall used from about the 1920s to 1970s. Earth slopes and earth retaining structures are used to maintain two different ground surface elevations. Function of Cantilever Retaining Wall To retain the soil at a slope that is greater than it would naturally assume, usually at a vertical or near vertical position. Design Consideration In order to calculate the pressure exerted at any point on the wall, the following must be considered: The effect of two forms of earth pressure need to be considered during the process of designing the retaining wall. They are:
  1. Active earth pressure - It is the pressure that at all times are tending to move or overturn the retaining wall
  2. Passive earth pressure - It is reactionary pressures that will react in the form of a resistance to movement of the wall.
Two Basic Form of Cantilever Wall 1 ) A base with a large heel so that the mass of earth above can be added to the wall for design purposes.

Figure 1 :Typical reinforced concrete cantilever walls

2 ) If form 1 is not practicable, a cantilever wall with a large toe must be used.

Figure 2 : Typical reinforced concrete cantilever retaining walls

From figure 1 and 2: Reinforcement of cantilever retaining wall Advantages and details about cantilever wall Reinforced cantilever walls have an economic height range of 1.200 to 6.000 m; walls in excess of this height have been economically constructed using prestressing techniques. Any durable facing material may be applied to the surface to improve the appearance of the wall but it must be remembered that such finishes are decorative and add nothing to the structural strength of the wall. Cantilever Wall Failure Identifying Failure of Cantilever Wall
Exit mobile version