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Bored piling completed at Bond Street

Bachy Soletanche has to completed the bored piling phase of work on London Underground’s Bond Street Station Upgrade project for main contractor Costain Laing O’Rourke.

Completion of the 900mm diameter, 54m maximum length bored piles will support the new over site development at the station but although the upgrade isn’t due to be completed until 2017, the piles will be put into service before the end of the year. Space on the small 12m by 25m extremely limited and Costain Laing O’Rourke will erect the concrete frame for the over site development before the end of the year so that it can be used to house the tunnelling equipment needed to construct the 350m of new foot tunnels planned in the upgrade.

Bachy has already completed secant piling for the basement level at the site to the north of Oxford Street and excavation is due to start in early August. Ahead of the mechanical excavation of the tunnels through the London Clay, Bachy will also install tubes a manchette from two grout shafts to prevent ground movement from the tunnelling work impacting on surrounding properties.

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