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Retaining Wall Design: CANTILEVER CONCRETE
Typical design parameters for common retaining wall types — height ranges, base width ratios, embedment depth, stability factors of safety, backfill and drainage requirements
| wall type | backfill requirement | base width to height ratio max (dimensionless) | base width to height ratio min (dimensionless) | drainage requirement | global stability fos min (dimensionless) | height max ft (ft) | height min ft (ft) | min embedment depth ft (ft) | overturning fos min (dimensionless) | reinforcement notes | sliding fos min (dimensionless) | typical applications |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CANTILEVER CONCRETE | Compacted granular fill preferred; phi>=28 deg; max 10% fines | 0.7 | 0.5 | Drainage blanket or geotextile-wrapped gravel drain behind stem; weep holes at 10ft o.c. | 1.5 | 25 | 3 | 0 | 2 | Conventional rebar; stem reinforcement at toe face; heel reinforcement at base top | 1.5 | Highway retaining walls up to 25 ft; bridge abutments; parking structures |
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