Assessment of permeability and behaviour of chalk in deep boreholes
The UK’s fast rail-link, HS2 proposes to boring a deep tunnel 60m+ through the Chilterns, chalk hills located in the South of England. To ensure the safe design and excavation of this tunnel, an understanding of chalk behaviour is vital. In particular, knowledge of how the chalk behaves when subjected to grouting techniques, required to prevent water ingress and subsequent flooding of the tunnel are needed.
James A Elson EngTech MIMMM explains his role in testing.