Parametric and back calculation analysis of tunnels construction in anisotropic rock mass with UDEC code

Diplomska naloga obravnava numerično simulacijo izkopa predora v anizotropnih tleh s pomočjo programskega orodja UDEC. Model sledi principu NATM, s postopnim izkopom čela (kalota, stopnica in talni obok), vendar brez upoštevanja postopnega sidranja ter brizganega betona po obodu predora. Diplomska naloga je razdeljena na dva dela. V prvem delu obravnava parametrično analizo vpliva geometrije ter materialnega modela na obliko in velikost pomikov oboda predora. Pet poglavij obravnava geometrijo modela, znotraj katerih so uporabljeni posamezni materialni modeli (elastični, Mohr-Coulombov in ubiquitous). Drugi del naloge obravnava povratno analizo pomikov dvopasovne cevi predora Šentvid. Pri povratni analizi je uporabljen en geometrijski model in tri materialni modeli. Rezultati so predstavljeni in komentirani na koncu vsakega poglavja ter povzeti na koncu dela.The thesis deals with numerical simulation of tunnel excavation in anisotropic soils by using UDEC software. The model follows the principles of NATM, with gradual excavation of the tunnel forehead (crown, bench, and invert) not accounting for the gradual anchoring and shotcrete on the tunnel walls. The work is divided into two parts. The first part deals with parametric analysis of material model and geometry influences on the shape and magnitude of the tunnel wall displacements. Five chapters are dedicated to the model geometry. Within each, various material models (elastic, Mohr-Coulomb and ubiquitous) are studied. The second part of the thesis deals with reverse analysis of displacements in the two-lane tunnel Šentvid. Reverse analysis uses one geometric model and three material models. The results are discussed at the end of each chapter and summarized at the end of work