Civil Engineering Reference
In-Depth Information
Granular backfill
Granular backfill
filter fabric
filter
Gravel pockets
drain
(a) Weep holes only
(b) Back drain
Semi-pervious backfill
Vertical filter strips midway
between weep holes
Filter strip
(c) Vertical strips of filter material
Clayey backfill
Clayey backfill
Continuous filter blanket
Filter strip
Continuous filter blanket
Filter strip
(d) Vertical drainage blanket
(e) Inclined drainage blanket
Fig. 7.26
Common drainage systems for retaining walls.
Fig. 7.27
Seepage forces behind a retaining wall with a vertical drain during heavy rain.
