List of products by author: C. Callari

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  Predicting stand-up time of the tunnel face using 3D numerical simulations

  Abstract: The advance rate and the standstill time of a TBM have a large influence on the face stability of tunnels driven below the water table. In soils of medium-to-low permeability, the timedependent development of seepage forces directed towards the face is often the main reason for collapse. In tunneling practice, mechanized or conventional, the assessment of the „stand-up time“, i.e. the time over...

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