Titlebook: Numerical Simulation in Tunnelling; Gernot Beer Book 2003 Springer-Verlag Wien 2003 environment.finite element method.geology.model.modeli

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Damage mechanics of jointed rock in tunnelling,d stress fields. The research work focuses on rate-independent and small-deformation behavior during isothermal processes. It is emphasized that the damage variables should be defined microstructurally rather than phenomenologically for jointed rock masses, and a secondorder “fabric tensor” is chose

incite

宽敞

Soft-computing-based parameter identification as the basis for prognoses of the structural behaviou data provided by the construction site. Model parameters for finite element (FE) analyses are identified such that the results of these calculations meet the available measurements as well as possible. For the determination of the unknown parameter set, use of an artificial neural network (ANN) is

拥护

Quantification of stress states in shotcrete shells,is performed at every NATM construction site. The combination of these monitored displacements with the material model for shotcrete outlined in Chap. 5 has led to the development of a hybrid method for the analysis of closed shotcrete tunnel shells by means of nonlinear Finite Element (FE) analyses

Nerve-Block

gonioscopy

A coupled FE-model for tunneling by means of compressed air,nt compressed air as a means for displacing the groundwater in the vicinity of the tunnel face. The coupled solid-fluid model is characterized by treating the soil as a three-phase material, consisting of the deformable soil skeleton and the fluid phases water and compressed air. It contains a numbe

原来

artifice

Vaginismus

Application of numerical simulation at the tunnel site,ld serve as a tool, which assists important decisions. One object of the project was to evaluate the efficiency and applicability of 2D and 3D finite element methods (FEM) and boundary element methods (BEM) to simulate tunnel advance under different geotechnical conditions. Another task to be perfor

Generalize

Summary and outlook,esearch work was to advance the reliability and efficiency of existing numerical simulation methods. To achieve an increase in reliability of the methods, i.e. to ensure that predictions made agree well with actual behaviour a significant amount of development had to be made with respect to material