Client
Private Client
Date of completion
September 2011
Value
£1.7m
Scope of works
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Construction of a double level basement, including a swimming pool, by top down techniques
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Enabling works
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Bulk excavation
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Piling
Project key points
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Structural refurbishment of the existing property - including temporary façade retention, new supporting steel frame and concrete floors
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300 contiguous pile wall to the basement perimeter, sacrificial supporting piles (used for top down construction) and permanent tension and bearing piles
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Sacrificial supporting stools to the existing property that temporarily support the structure and allow the lower ground floor slab to be cast under all existing load bearing walls
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Mole holes left in the slab for excavation of basement
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Bulk excavation of basement top down using the mole holes while the lower ground floor slab and existing structure are supported on the sacrificial piles
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New reinforced concrete basement sub-structure, including basement slab, lining walls, basement perimeter and new supporting columns
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New super-structure works, including façade retention, new steel frame and concrete floors on composite metal floor decking, all constructed by taking off the existing roof