Monitoring for the Thameslink Borough Viaduct | United Kingdom
Project summary
Images of the project
Construction works in complex urban environment
A major bottleneck in the area of the two-track Borough Market Viaduct, west of London Bridge, has been caused by trains on the Thameslink route to Blackfriars and all trains to Charing Cross using this route.
To relieve this, an additional pair of tracks are being added to this short section of the route. Trains to Charing Cross will use the southern pair of tracks.
This will give Thameslink trains a dedicated route to Blackfriars on the Northern pair, which is key to providing the nominal peak hour frequency of 24 number trains per hour on the core route.
Between London Bridge and the vicinity of Stoney Street, the extra pair of tracks are on a new viaduct to the south of the existing one. This has required the demolition (and subsequent replacement) of a group of buildings within Borough Market, which is a conservation area.
West of Stoney Street, most of the widening of the existing viaduct has been to the north, to avoid affected the Hop Exchange building to the south.
Bespoke monitoring
Sixense was selected to provide the installation of monitoring equipment, instruments and manual surveying to determine the movement of tunnels and other structures beneath and adjacent to the proposed viaduct and associated reinstatement buildings.
All instruments were datalogged to provide on-going reports on the structural movements within the area of influence.
