TTMJ is the acronym for the Diaphragm Wall Tension Track Milled Joint currently in development as part of the European Union's innovative and far-reaching Horizon 2020 initiative (FTI Pilot-2015-1 720579). The TTMJ system is protected by patent in Europe and the USA and is currently under development by a consortium comprising TREVI SpA (Italy), Arup (Netherlands) and CCMJ Systems (UK).
The TTMJ System is a method of forming panel joints in diaphragm walls. The system theoretically can be used to any depth and can be used to provide a water-stop in the joint and a tension connection between adjacent panels.
This paper follows on from the one presented at the DFI New Orleans Conference in October 2017 which outlined the principles of the TTMJ System. In this paper, further details of the system are provided and the testing carried out to date reported. The intentions and scope of the proposed full-scale field trails are then described.
Subjects: Slurry Walls, Diaphragm Wall, joints, CWS
Author: Julian Crawley, John Coupland, Maurizio Siepi and Paul van Horn
Publisher: DFI, EFFC