Rockfalls and falling of separate rocks are a dangerous and frequent occurrence on the broader area of the town Omiš, thus the entire area is classified as highly dangerous. The theme of the thesis is protection of the western part of Omiš from frequent rockfalls, its goal being to recommend an appropriate safety system to effectively protect the inhabitants of Omiš and all objects under the crumbly slope. The thesis describes all past events of rockfalls that occurred in the area and determines the existing protection and remediation objects of unstable rocky slopes in Omiš. The thesis also comprises descriptions of all methods of protection and remediation of unstable slopes in general.
The use of Rocscience RocFall 6.1. program is the backbone of the thesis work as it enables simulation and prediction of direction (trajectories) of potential rockfalls. To best use the program, it was necessary to revert to historical records of rockfalls and past field studies in the area to best determine the parameters of ground and rock blocks used for simulation. By using the program, a back analysis based on a few fallen rocks was carried out to establish the size of the model and to obtain reliable parameters for any future simulations. The results of simulations are displayed in graphs and show the kinetic energy and height of the rock block rebounds which enabled us to determine the most optimal locations on the slope for the execution of protective measures against rockfalls. The results are shown for the existing state of slopes without and with the relevant protective measure. The results with protective measure show that the protective embakment on the chosen location successfully stopped rockfalls. In the work we also demonstrated the advantages of constructing a protective embankment as well as the most appropriate forms of protection measures for a particular location of work, and on the basis of the obtained data we decided for a protective embankment.
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