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  TBM at the Meuse/Haute-Marne Underground Research Laboratory

  A new method for tunnel construction has been tested at the Meuse Haute Marne Underground Research Laboratory (URL) of Andra (French national radioactive waste management agency). A full face TBM could not be easily used in the URL due to the small size of the shaft and the low capacity (in size and load) of the freight elevator. In accordance with the in situ conditions, a road header under shield was tested in 2013 with segments emplacement technique. The technological objectives of this experiment are to check the feasibility of the installation of segments with a qualifying thickness for both directions gallery against major natural stresses, to gain a feedback in different operational situations and to identify the difficulties.

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