An
8m high cut face and the need to minimise excavation and import of
granular fill were the main considerations for us on this scheme. The
solution was further complicated as the boundary to the site was very
close to the crest of the new wall ruling out ground anchors or soil
nails and making it quite a challenge for our design (and construction)
team. A hybrid approach was adopted using part gravity and part tie back
structure with a timber crib facing linked to no fines concrete
backfill in the lower cut sections of the wall and reinforced earth
elements in the fill upper zone.
Work
is progressing steadily on site now with close coordination of
excavation, wall face build, infilling and backfilling in order that the
bank integrity is maintained throughout, particularly through periods
of inclement weather.
Grow bags are being inserted into the wall in order that the face can be planted out on completion.
