The NRG Tunnelling software is designed to check the clearances for the final tunnel alignment. It can also calculate overbreak and underbreak volumes, along with a range of setting out options for laser guidance and tunnel floor intersection points.
Tunnel alignments can be entered either manually or by extracting digital design information. Errors can then be checked and eliminated.
Two alignments can be compared i.e. that of the tunnel and the laser. By entering details of how the tunnel centre and target are related to the setting out.
Shapes are hung from the design alignment to represent a design profile or a train’s kinematic envelope and react with the cant of the tracks in a variety of ways to meet most design criteria.
Asbuilt surveys can be imported and converted into section files. The asbuilt position can be compared to the design alignment and if required the alignment can be redesigned to put the tunnel back on track.
Reports can be created by running a wriggle using surveyed asbuilt data and the design data to highlight overbreak or underbreak areas. Along with overbreak or underbreak volumes, maximum and minimum clearances and pinch points. The tunnelling software can also use a train’s kinematic envelope and the design data for clash detection.
Tunnel monitoring allows asbuilt profiles to be monitored. Reports can be generated showing graphs of movement/time, jellyfish plots, convergence and divergence,isopachs along with excavation steps to show the progress of the tunnel.