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Video | Precast arches used on Bermondsey Dive Under project

Network Rail project manager Greg Thornett says a precast arch solution has helped to create efficiencies on the Bermondsey Dive Under project in south east London.

The £45M project, which forms part of Network Rail’s £6.5bn Thameslink programme, and which is being delivered by main contractor Skanska and consultant Ramboll, will realign and untangle tracks at a notorious pinch pint in the Bermondsey area.

“We’re creating a large concrete box structure that allows Kent lines to dive down and then come up the other side, and allows the Thameslink lines to fly over the top so they can get across to the through platforms at London Bridge station without having to stop and queue at the signals in the Bermondsey area,” says Thornett.

In this video, Thornett describes how a precast arch solution was used for the first of the dive under ramps. This rests on the existing pier footings from the original Victorian viaducts that were demolished to make way for the new structure.   

Ramboll lead designer and director of rail Will Duckett says: “The major feature is that the new arches are similar to the existing masonry arches. The benefits of this are that the load distribution on the foundations is unchanged, and many of the existing piers can be reused, reducing the requirement for piled foundations.”

To read an in-depth feature about the Bermondsey Dive Under project, click here

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