Tiered Retaining Wall Design Calculations

In the ncma design manual 2010 third ed use figure 5 6 surcharge approximation for tiered walls question.

Tiered retaining wall design calculations.

Design procedure overview 3. 3 provides specific guidelines for tiered srws with respect to the spacing between tiers and the effect of the upper wall on the internal and external stability of the lower wall see figure 6. Aesthetics a single retaining wall 15 ft 4 6 m high may be too overpowering for the setting of your wall. Tiered retaining walls use of tiered walls is a special condition where two or more short walls horizontally offset from one another are used in lieu of a single tall retaining wall.

The reasons vary from. Earthquake seismic design 7. A retaining wall engineer can design the lower wall for the surcharge load applied by the upper wall. Design and build your retaining wall to slope at a minimum rate of.

A retaining wall engineer can design the lower wall for the surcharge load applied by the upper wall. A wall that leans into the soil it retains is less likely to be pushed outward by soil pressure than a plain old vertical wall. 1 2 m tall walls can be designed to include terraces. 1 5 m tall walls or four 4 ft.

Tiered walls the ncma design manual for segmental retaining walls ref. Types of retaining walls tieback wall tieback is a horizontal wire or rod or a helical anchor use to reinforce retaining wall for stability one end of the tieback is secured to the wall while the other end is anchored to a stable structure i e. Abstract txdot is experiencing wider use of multi tiered mse and concrete block retaining walls. He need for tiered retaining walls is a common place occurrence.

In this situation breaking the wall into three 5 ft. Can i have a single wall that splits apart with the bottom half curving away from the top half. Design methodology for tiered mse or concrete block retaining walls. Forces on retaining walls 6.

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. 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. In the ncma design manual 2010 third ed use figure 5 6 surcharge approximation for tiered walls.

When tiered walls are not properly offset from each other the upper wall may impose a surcharge condition on the lower wall. Soil bearing and stability 8. Can i have a single wall that splits apart with the bottom half curving away from the top half. Concrete deadman driven into the ground or anchored into the earth with sufficient resistance.