SLOPE PROTECTION ON THE ISLAND OF VIS

Slope protection in modern engineering represents a common task faced by geotechnical engineers. The selection of a slope protection system is primarily determined by the material in which the excavation is made, specifically its mechanical properties. The slope protection on the island of Vis was carried out for the construction of a supermarket. The location of the supermarket is on a natural slope, where a cutting was made with a maximum height of 22 meters. The excavation was executed in four levels, with each level having a maximum height of 6 meters. Prior to the project, geotechnical investigative work was carried out, including geophysical methods of shallow seismic refraction. Following the investigative work, geostatic analyses of global stability were conducted using limit equilibrium methods. Based on the calculations, the protection system was designed using self-drilling geotechnical anchors with lengths of 9.0, 6.0, and 3.0 meters. The slope is protected with mesh to prevent rockfalls, with one type of higher tensile strength being placed at the upper part of the excavation, while a lower tensile strength mesh is placed in the lower section. Due to the significant height of the excavation, which will house a supermarket with a parking lot and experience high human traffic, a polypropylene anti-erosion mesh is installed across the entire surface to prevent the fall of small rock fragments. After each excavation stage, engineering geological mapping of the rock mass was conducted, followed by control analyses of global stability and block stability to verify the designed solution.