Page 2 - RuFUS Project Experience.cdr

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Reusing Foundations

Strategies for re-purposing foundations (1)
creation of a piled raft
Brief description:
One of the concerns for reuse has been the continued
loading of historic foundations to design loads with all the
uncertainties that code changes can bring. CGL on a project
in Lambeth High Street, with structural engineers Iesis, were
able to convert a piled structure to a new piled raft structure
allowing a substantial reduction in pile loadings with the
enhancement of the original floor slab to a raft.

Ÿ Site investigation
Ÿ Foundation investigation
Ÿ PLAXIS 3D ground modelling Lambeth High Street (3D model of piles and rafting)
Ÿ Negotiations with NHBC

Strategies for re-purposing foundations (2)
reuse of piles

Brief description:
Working with Simpson Associates, CGL was engaged to
provide a site investigation to assess the viability of reusing
the existing piled foundations and incorporating them into a
proposed new 14 storey concrete frame building with much
higher foundation loads than the original 9 storey structure.
Services provided were:

Ÿ Site investigation
Ÿ Foundation investigation
Ÿ PLAXIS 3D ground modelling
191 Old Marylebone Road
(graphical output of pile settlement computation)
Reconfiguring demolition temporary support
foundations

Brief description:
Working closely with Galliford Try on the Seymour Street site
complex foundations and supports were rationalised. CGL
provided considerable value engineering by lowering the
foundations temporary gable support towers while
maintaining tight party wall movement constraints.

Ÿ Analysis of gable support towers and design of piled
underpins
Ÿ Support on basement construction strategy and
regulatory approval
Ÿ On site support for construction changes Seymour Street
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