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Polish Academy of Sciences. Committee of Mineral Economy Sustainable Development Istytut Gospodarki surowcami mineralnymi i energia
Abstract
The study of the ground-tunnel interaction by introducing a predetermined degree of variation (fuzziness)
in some parameters of the chosen model is presented and discussed. This research comes from the consideration
that tunnel model parameters and geometry are usually affected by a degree of uncertainty, mainly due to
construction imprecision and the great variability of rock mass properties. The research has been developed by
using the fuzzy set theory assuming that three model parameters are affected by a certain amount of uncertainty
(defined by the so-called membership functions). The response of the numerical model is calculated by solving
the fuzzy equations for different shapes of the membership functions. In order to investigate the effects of some
model parameters, and to provide a simple procedure and tool for the designers, a study on the effect of tunnel
boundary conditions, based on a fuzzy model, has been carried out using a simple but well known and widely used
design method such as the bedded-beam-spring model
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