D-15 Rockwheel Tyne Tunnel Diaphragm Walls Scaling
260M New Tyne Crossing project included the development of a second vehicle tunnel under the River Tyne, followed by the major refurbishment of the original vehicle tunnel which opened in 1967.
The image below shows how diaphragm walls are made.
![Diaphragm-Wall](https://webstertechnologies.co.uk/wp-content/uploads/Diaphragm-Wall-300x185.jpg)
After the diaphragm walls are completed they’re left in a uneven surface depending on the ground, so The D-15 Rockwheel was used to scale the walls and leave a profiled finish to them.