Barnet Tunnel

Three surveys were required in Barnet Tunnels Centre bore.

The first survey was a void scan using the CALs system to workout the volume and cap shape of the hidden shaft located at Tab 70.

A pointcloud survey of the tunnel was also required which was used in conjunction with a thermal camera to help identify areas where water  ingress was effecting the OLE insulators.

Scantech International carried out a 3D laser scanning and photogrammetry survey of Barnet Centre Bore Tunnel to support ClearRoute gauging analysis.

The survey has also created a high-accuracy digital baseline for future monitoring, asset management and engineering works, alongside a full 3D model that can be utilised across multiple Network Rail disciplines.