Goran Grget, Katarina Ravnjak, Mladen Krpan

Last modified: 2017-02-28


This paper describes methodology used in slope maintenance in cut area on 18.5 km Krapina – Macelj section of Zagreb-Macelj motorway. Based on geotechnical investigations 15 cut locations were treated in main design and for another 15 locations detailed design is made. After motorway opening annual monitoring program was conducted. Program included measurement interpretation, visual observation of slopes and periodical reports. Report contained description of observed slope instabilities and defects and proposed one-time and periodical maintenance measures. The report conclusions initiated slopes remediation. This paper show 2 cut locations, Gornji Macelj 4 and Straža-jug. After defect detection detailed visual observation was done and crackmeters were installed. Based on displacement measurements and defect description back-analysis of slope stability was conducted. The result of analysis was remedial measures on slope protection system. Adaptation of slope stability protection within periodical maintenance allows on time detection of potential high risk situation, damage prevention and the use of optimal remediation measures.

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