The Tunnel Dismantling Machine (TDM):the Next Generation of Tunnellers
An innovative solution to meet a sizeable challenge
During the extension of the MTR West Island Line 703 of the Hong Kong subway system, Bouygues Travaux Publics teams connected a new tunnel to an existing 150-meter diameter tunnel. As an additional challenge, they also had to excavate loose soil in an area dense with utility networks and skyscraper and tower foundations.
In partnership with CSM-Bessac, Bouygues Travaux Publics specially designed and built a new dismantling machine: the Tunnel Dismantling Machine (TDM). A world first. This machine empties the tunnel segments from behind, filling them with cement with an arm located in the front, in preparation for the excavation of the new tunnel. This model helps to avoid collapses and water leaks, and limits difficult dives and exposure to hyperbaric conditions.
A widely recognized innovation
The TDM has received numerous awards, including first prize in Process/Equipment category in the 2013 French Public Works Trophies, an event organized by the French National Federation of Public Works (FNTP).
The tunnel boring machine also won the prize for "Product or Equipment of the Year", awarded by the International Tunnelling Association in London.
Looking ahead to new projects
With around ten sites completed each year, the tunnelling expertise of Bouygues Travaux Publics is world-renowned. In 2013, our subsidiary heavily invested in very deep tunnels and hopes to continue this development in the months and years to come. It will use breakthrough innovations to keep its advantage and increase its value added on large-scale projects.
Bruno Combe, Tunnel Manager at Bouygues Travaux Publics
Bouygues TP's Technical Division was closely involved in the design of the machine and its operation. This project shows our capacity to propose innovative and safe solutions to respond to a specific problem encountered by a customer.