Bankside, London1
- Retail & Commercial
- Concrete Frame, Substructure
- Client:
- Landsec / Bovis Lendlease
- Architect:
- Allies & Morrison
- Contract:
- £70M
A commercial project for Land Securities comprises 13 storeys of office space above ground and a high specification 3 storey basement below.
The client required a minimum depth in concrete superstructure and the contractor wished to utilise top down basement construction to speed construction.
Walsh Associates met these requirements with a concrete flat slab superstructure with steel stanchions within the basement.
High strength 80N concrete was utilised for both columns and slabs to minimise the size of structural elements.
Top down construction was achieved by the use of “plunged stanchions”, carrying up to 30000kN. These were embedded up to 6m within the concrete piles. The design was justified by a rigorous analysis of existing test data as no code rules exist for this technology breaking form of construction.
The concrete cores sit on plate girders, designed to fit within the width of the walls. These act compositely with the walls above to save material and to ease the construction difficulty.
The superstructure utilises 330mm flat slabs spanning 10.5m. These were designed using 3D finite element software.
Ref: 1770
