Numerical Calculations of Underground Construction

Course guarantor:

Jan Pruška

Lecturer:

Jan Pruška

Tutor:

Supervisor:

Department of Geotechnics

Synopsis:

The course discusses the basic differences of structural calculations of underground buildings from those of ground structures (inaccuracy of input data, influence of the technology of implementation, main sources of errors, importance of parametric studies and back analyses). The principles of design of tunnels using the New Austrian Tunnelling Method are explained (stability of unreinforced excavation, design of primary shotcrete lining, design of the influence of supporting elements). Furthermore, the modelling of tunnel borings using tunnel boring machines (TBM) in rocks and earth shields (EPBS) in soils (including the influence of pressures before the face) is discussed. The principles of segmental lining design in mechanized excavation are also explained. The issue of overburden settlement is discussed generally without the influence of tunnelling methods. The basic tools for the calculation and design of underground structures (empirical relationships, manual calculations, numerical methods, available software) are presented and compared.

Requirements:

None

Syllabus of lectures:

-Inaccuracy of the input data and main sources of errors in the numerical modelling of underground structures

-Principles of modelling New Austrian Tunnelling Method (sprayed concrete primary lining, sequence of the excavation – ß method, influence of supporting elements (rock bolts etc.)

-Modelling of the earth shields (EPBS) in soils (including the influence of pre-face pressures).

-parametric studies and back analyses

Syllabus of tutorials:

None

Study Objective:

The aim is to introduce students to the problems of numerical modelling of underground structures mined by NRTM or tunneling machines.

Study materials:

Debasis Deb Finite Element Methods: Concepts and Applications in Geomechanics, New Delphi: PHI Learning Privite Limited 2012, ISBN 978-81-203-4295-8

SINHA, Roghupati S.: Underground Structures (Design and Instrumentation). Elsevier, 1989. ISBN 0-444-88991-4.

Note:

Time-table for winter semester 2024/2025:

Time-table is not available yet

Time-table for summer semester 2024/2025:

Time-table is not available yet

The course is a part of the following study plans: