TTMJ stands for Tension Track Milled Joint and is an EU-funded project under the framework of Horizon 2020.
The TTMJ project a new joint system providing foundation specialists with the capability to deliver high quality, watertight and safe effective diaphragm wall joints at lower costs.
The new system offers the possibility to construct profiled joints to increased depth by maintaining the vertical alignment of the primary panel. The joint is milled with a dedicated machine (trimmer) guided by tracks previously cast into the primary panel (after the secondary panel has been excavated and before it is concreted) ensuring the continuity of the joints in the completed diaphragm wall, even those constructed with the clamshell technique.
(Community Research & Development Information Service)