Ground settlement induced by tunnel boring in stiff clayTunnel construction in water saturated soil causes changes in stress and strain of soil, which is primarily dependant on mechanical properties of soil in the tunnel construction zone. The paper presents a prediction of short-term and long-term deformations of soil, with a particular emphasis on ground surface settlements after the tunnel construction. The aforementioned predictions were made using a widely applicable numerical soil model that accurately describes the results of triaxial tests, in combination with the existing procedures for determination of soil parameters, taking at that into account natural heterogeneity of the soil as observed through heterogeneity of natural moisture of clay. Slijeganja tla izazvana bušenjem tunela u krutim glinamaIzvođenje tunela u vodom zasićenom tlu izaziva u tlu promjene naprezanja i deformacija koje prije svega ovise o mehaničkim karakteristikama tla u zoni izgradnje tunela. U ovom radu su prognozirane kratkotrajne i dugotrajne deformacije tla te naročito slijeganja na površini terena nakon izvedbe tunela. Navedene prognoze su dobivene pomoću široko primjenjivanog numeričkog modela tla koji vjerno opisuje rezultate troosnih ispitivanja, uz primjenu postojećih postupaka određivanja parametara tla, ali uzimajući u obzir njegovu prirodnu heterogenost uočljivu kroz heterogenost prirodne vlažnosti gline.