Crossrail High Accuracy Surveying for Tunneling Monitoring

Crossrail Amberg Kinematic Laser Scan Point Cloud - Track

 As the Crossrail project starts it’s tunneling under the streets and infrastructure of London a huge amount of preparation work is going on to prevent monitor and  subsidence. 

Crossrail Amberg Kinematic Laser Scan Point Cloud - Paddington

Tunneling has already begun from the Western Portal, just outside Paddington Station, where The Severn Partnership has been busy compiling a comprehensive data set to be used for the monitoring of Network Rail infrastructure as the huge Tunnel Boring Machines (TBMs) munch their way underneath. 

Crossrail Paddington P-way Track Survey

Combining High Accuracy Leica TS30, 0.5 arc second 0.5mm, Total Stations with the latest Amberg Track Geometry Measuring Devices to coordinate every track and cross over unit on the approach to Paddington Station has provided the Crossrail team with a benchmark survey to monitor changes against. In addition a Kinematic Laser Scan Point Cloud provides a 3 dimensional model of all overhead line equipment and gantry structures prior to the TBMs passing underneath. Should any movement occur during tunneling, the entire stretch of track and infrastructure can be precisely reinstated with confidence. If all goes to plan, no one will even know the machines have been there....


For more information or to discuss your project requirements further please email: webenquiry@severnpartnership.co.uk or contact Rollo Rigby on 0844 880 8247  

Severn Partnership wins Great Western Structures survey

The Severn Partnership and consulting engineers Parsons Brinckerhoff were selected to undertake a detailed survey of over 280 bridge and tunnels structures on the great Western main line (October 2009 to December 2009). This included the Severn Tunnel along with Box, Sodbury, Newport and Patchway Tunnels. All surveyed as 3D point clouds combined with high accuracy track geometry using our new GRP5000 system.

The Rail Engineer, March 2010 - Article on tunnel survey and kinematic laser scanning