Retaining walls - Geotechnical Investigation and Design Tables - page 252

Table 20.2 Typical gravity wall designs.

Gravity Top width Base width Heights Other design elements

wall type

Gravity 300 mm 0.4 H to 0.7 H Common for H

=

2-3 m 0.1H to 0.2H base

masonry (minimum) Uneconomic for H 4 m thickness

=

Rare for H 7 m 1 Horizontal to 50 Vertical

face batter

=

Reinforced 300 mm 0.4 H to 0.7 H Suitable for H 7 m 0.1H Base thickness <

concrete (minimum) Counterforts for H

>

5 m 1 Horizontal to 50 Vertical

Counterfort spacing 2/3H face batter

but 2.5 m

>

Crib wall 0.5 H to 0.5 H to 1.0 H Suitable for H 5 m 1 Horizontal to 6 Vertical <

1.0 H face batter

Gabion wall 0.5 m 0.4 H to 0.6 H Suitable for H

<

10 m 1 Horizontal to 8 Vertical

(minimum) face batter

Figure 20.1 Type of walls.