Preserving engineering heritage
Remodelling of 20 Finsbury Circus was to cause significant load redistribution to its foundations and ground movemnet. Not a big problem usually but when the site is adjacent to a fragile 1874 cut-and-cover tunnel for the world's oldest underground railway, some more detailed study was needed to ensure such heritage was not damaged and the essential transport link kept open.
A detailed 3D FEA model of the building sub-structure and surrounding ground predicted that the old bridge would not suffer any ill effects resulting from the building remodelling and approval for the redevelopment was granted.
Study of site investigation and records for the cut and cover tunnel asset.
3D FEA model of building sub-structure and surrounding ground.
Simulation of existing building load and the load redistribution associated with the remodelling.
Prediction of strains on old railway tunnel within acceptable limits.
Planning approval granted.