The paper presents some experiences during the reinforced cut construction in the flysch depositson the Adriatic motorway near city of Rijeka, Croatia. The major part of the motorway was constructed by cuttingin flysch rock mass. Stabilities of the cuts were ensured by reinforcing of rock mass with rock bolts and appropriatesupporting systems. The self boring rock bolts in combination with multilayered sprayed concrete or reinforcedmat construction were used. Shallow bored drains were installed for dissipation of ground water collected atthe contact of permeable cover and impermeable flysch rock mass. Interactive rock mass cutting design, basedon the observational methods, was introduced during the construction. The active design approach has allowedthe designer, based on the rock mass conditions and monitoring results to change the support system at someunfavourable locations. The measured values and back analysis has enabled the establishment of real rock massstrength parameters and deformability modulus.
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