Engineering geological model of the Trstenik landslide (city of Zagreb)

Zadatak diplomskog rada bila je interpretacija inženjerskogeološkog modela klizišta Trstenik te analiza uzroka koji su doveli do njegove aktivacije. Inženjerskogeološki model interpretiran je isključivo na temelju podataka inženjerskogeološkog kartiranja. Klizište Trstenik je translacijsko klizište, ukupne duljine 250 m, širine 70 m i interpretirane dubine od 5,5 m. Determinacijom i interpretacijom materijala na izdancima je utvrđeno da istraživanu lokaciju izgrađuju srednje trošni tortonski lapori u podlozi te trošni lapori i koluvijalne naslage na površini. Obzirom na vrste materijala i položaj slojevitosti pretpostavljeno je da je do klizanja došlo na granici srednje trošnih i trošnih lapora. Analiza uzroka klizanja provedena je na podacima o oborinama s meteoroloških stanica Čučerje, Kašina i Zagreb-Rim. Klizište je aktivirano 13.02.2014. Analizom su obuhvaćene mjesečne oborine, koje su za siječanj 2014. iznosile od 22 do 36% više od prosjeka, a za veljaču od 148 do 171% više od prosjeka. Analizom su obuhvaćene i prethodne oborine, koje su uspoređene s regionalnim graničnim vrijednostima.
The aim of the thesis was the interpretation of the Trstenik landslide engineering geological model, as well as the analysis of its causes. The engineering geological model is interpreted on the basis of engineering geological mapping. Trstenik landslide is a translational landside with a total length of 250 m, width of 70 m, and interpreted depth of 5.5 m. Determination and interpretation of the material on the outcrops showed different types of engineering geological units, medium weathered tortonian marl in the substrate and weathered marl and colluvial on the surface. Given the type of the material and the bedding orientation, it was assumed that sliding occurred at the boundary of medium weathered and weathered marl. The analysis of the cause of the landslide was carried out on the precipitation data from the meteorological stations of Čučerje, Kašina and Zagreb-Rim. The landslide was activated on 13th February 2014. The analysis showed that monthly precipitation in January 2014 was 22 to 36% higher than the average, while in February it was 148 to 171% higher than the average. The analysis also include previous precipitation which are compared with regional boundary values.