Page 5 - Deep Basements Project Examples

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Deep Basements - Example Projects

Fitzjohn’s Avenue, Hampstead, London CGL devised the construction sequencing for the sensitive
Basement Impact Assessment, Ground Modelling, boundary perimeter protecting the assets around the sites.
Specification and Design A range of pragmatic and cost effective solutions were
introduced throughout the site, for example CGL made use
No. 79 Fitzjohn's Avenue is a £28 million development of of the existing reinforced concrete retaining wall by
prestigious retirement apartments in Hampstead, London introducing king posts to reduce new piling. CGL also
Borough of Camden. The development comprises five to designed propping corbels to limit ground movement and
seven storeys with a 12m deep basement for an reduce risk.
underground car stacker system.
CGL used the permanent works as reaction piles to
CGL worked for the client, Pegasus Life and Gleeds, the support the boundary walls during construction, a
project manager to provide geotechnical advice for the sustainable alternative to installing temporary piles.
pre-planning application and during the substructure Laterally loaded piles were designed using PLAXIS to
construction. calculate the forces from the propping scheme applied to
the piles. The temporary works designs were used to gain
CGL's initial brief was to provide a Basement Impact approvals from London Borough of Camden, Highways and
Assessment (BIA) and later a post-planning Ground party wall engineers.
Modelling Report (GMR). CGL has also produced enabling
works specifications and designs that were used for third
party stakeholder approvals.

CGL was appointed as the primary temporary works
designer and Certifying Engineer for the Basement
Construction Plan (BCP). The TW design report includes
sequencing and a fully co-ordinated TW design.

Temporary props supporting party wall and highway for basement excavation
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