Strainstall has provided and is operating an extensive monitoring system for the Blackfriars Station redevelopment project in London, part of Network Rail’s Thameslink project.
The underground part of the station has been demolished and a large amount of excavation took place in 2010, directly adjacent to the London Underground District & Circle lines and also adjacent to the piers of bridges supporting the Thameslink line that passes through the station.
To keep the railway and underground lines operating safely 10 main areas are monitored, including neighbouring listed buildings and services tunnels containing power. The main components now include 15 automated total stations, around 850 prisms, vibration monitoring, electro-l
evel beams, displacement and crack monitoring, strain gauges and gas leak detection.
Recent milestones in construction have been achieved at the site, with the re-alignment of the Thameslink route over the River Thames bridge during the Christmas 2010 period. The through lines have now been re-located from the west to the east side of the bridge. As the site changes the monitoring systems also need to be updated: prior to the Christmas break two additional automated total stations were added to the monitoring system on the District and Circle lines, along with a further 50 prisms.
The new station is scheduled for completion in Spring 2012. Strainstall are working for the project consultant Jacobs.