Nagel, Felix Josef

Numerical modelling of partially saturated soil and simulation of shield supported tunnel advance

For the holistic and process-oriented simulation of mechanised tunnelling two aspects have to be considered: on the one hand side a numerical description of the construction process is required and on the other hand side a sufficiently accurate modeling of the surrounding underground has to be applied. To achieve such a simulation model first, a Finite Element Model for the description of partially saturated soil as a three phase material is developed. Second, the interactions between the tunnel construction process and the surrounding undergound - via the heading face support, by frictional contact between shield skin and soil and due to grouting of the annular gap - are discussed and adequate sub-models for their numerical consideration are developed. Selected simulations of real scale examples including the analysis of a compressed air intervention demonstrate applicability of the so-developed simulation model for shield supported tunnel construction.

A numerical simulation model for shield tunnelling with compressed air support / Nagel, F., J. Stascheit, and G. Meschke
In: Geomechanics and Tunnelling, Bd. 1.2008, H. 3, S. 222 - 228

Processoriented numerical simulation of mechanised tunnelling / Nagel, F. [u.a.]
In: Technology and innovationin underground construction / G. Beer (Ed.). - London: Taylor and Francis, 2009

An elasto-plastic three phase model for partially saturated soil for the finite element simulation of compressed air support in tunnelling / Nagel, F. and G. Meschke
In: International journal for numerical and analytical methods in geomechanics, 2009. - DOI: 10.1002/nag.828