The landslide rehabilitation project of the area of the public road Čeplje – Zaboršt – Stari grad

The basis for my diploma work is the landslide rehabilitation project of the area of ​​the public road Čeplje – Zaboršt – Stari grad. It concerns the rehabilitation of the small landslide in the municipality of Vransko, the construction project documentation was prepared by the company where I am also employed.

At the beginning of the thesis, I described the work in the project group. I presented the conceptual design of the thesis to my classmates. Then, in the theoretical part, I described landslides in more detail. Landslides are a natural phenomenon where an earth mass moves in a block. This is slope movements of earth masses under the influence of gravity. Sliding is determined by observing the slope of the terrain, morphology and other features that indicate the terrain is sliding (for example, the inclination of tree trunks).

The landslide, which I discuss in my thesis, was induced after heavy rains. Cracks appeared on the asphalted road, slided area was the road surface and the forest below the road. The cause of the landslide was the increased amount of surface water that flowed into the landslide area and the saturation of the soil. Geological research was carried out (geological borehole logging, geological mapping and laboratory tests). Two proposals for landslide rehabilitation are presented in the thesis.

The first variant is rehabilitation with a retaining stone wall. If the configuration of the terrain allows us to create a plateau from which excavation for the foundation of a retaining stone wall is possible up to a depth of 4.5m below the level of the plateau, one builds a retaining stone wall. The biggest advantage of the retaining stone wall is the easy drainage of backwater, as it contains little concrete (up to 30%) and is consequently water-permeable.

Water is the biggest problem of landslides, as it is necessary to remove the water outside the area of ​​the landslide in order to successfully rehabilitate the landslide. Another variant of landslide remediation is an anchored, reinforced concrete pile wall, which is the only sollution in a very steep areas and where the solid rock is too deep and the retaining stone wall would not be possible. For both construction proposals, the construction implementation process and the building materials are explained.

In the sixth chapter, the cost comparison for both constructions are given, they are also the basis for the evaluation of the hypotheses, which are given in the introduction and explained in the conclusion. In the core topic, a study was carried out on the carbon footprint of the basic building materials of a retaining stone wall and an anchored pile wall.