Construction † a reinforced concrete base is cast with projecting
steel bars accurately located for vertical continuity. The wall may
be built solid, e.g. Quetta bond, with voids left around the bars for
subsequent grouting. Alternatively, the wall may be of wide cavity
construction, where the exposed reinforcement is wrapped in
`denso' grease tape for protection against corrosion. Steel bars are
threaded at the top to take a tensioning nut over a bearing plate.
Typical post-tensioned
masonry retaining wallprecast concrete padstone
nut and bearing plate upper ground levelgranular backfillground water drainpost-tensioning bar reinforcement
in concrete foundationmasonry cavity wallgrease tape corrosion
protection to steel
bars if void left openlower ground
levelpost-tensioning
nuts on threaded
steelthreaded
socket
couplersmasonry wallbearing platereinforcement
grouted into
voids in
perforated
brickscurtailed barsbase retention
plateinterim nuts and
bearing platecontinuity
reinforcement
from baseStaged post-tensioning to high masonry retaining walls
Ref. BS 5628-2: Code of practice for use of masonry. Structural
use of reinforced and prestressed masonry.
Post-Tensioned Retaining Wall