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Cementation Foundations Skanska


Cementation Foundations Skanska completed piling for the new Swiss Re office in the City of London last month.

The controversial cigar shaped building, designed by architect Sir Norman Foster and christened the 'Gherkin', uses a diagonal spiral frame structure that will found on an unusual double ring of some 340 piles. The 750mm diameter bored friction piles were installed to depths of between 23m and 34m through fill and claystone into London clay. Cementation used three rigs on the eight-week contract including a new Soilmec 312 rig. The Swiss Re building replaces the Baltic Exchange destroyed by an IRA bomb in the 1990s. Skanska Construction will continue with the superstructure work on the £130M project.

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