Causes of Landslide Movement and Remediation Proposals for the Landslide in the Area of the Public Road Čeplje – Zaboršt – Stari Grad

The basis for his diploma thesis is the project for the Remediation of the Landslide in the Area of the Public Road Čeplje – Zaboršt – Stari Grad. It concerns the remediation of a smaller landslide in the municipality of Vransko, for which the project documentation for construction implementation (PZI) was prepared by the company where he is also employed. Furthermore, two proposals for landslide remediation are presented in the diploma thesis. The first variant is remediation with a supporting stone masonry structure.

Problem

The basis for his diploma thesis is the project for the Remediation of the Landslide in the Area of the Public Road Čeplje – Zaboršt – Stari Grad.

Solution and Method

It concerns the remediation of a smaller landslide in the municipality of Vransko, for which the project documentation for construction implementation (PZI) was prepared by the company where he is also employed. At the beginning of the diploma thesis, he described the work in the project team. He presented the conceptual design of the diploma thesis to his fellow students.

Then, in the theoretical part, he described earth landslides in more detail. Earth landslides are a natural phenomenon where the earth mass moves as a body. We are talking about slope movements of earth masses under the influence of gravity.

Landslide movement is determined by observing the slope of the terrain, morphology and other characteristics that indicate terrain sliding (for example, the inclination of tree trunks). The landslide discussed in the diploma thesis was activated after heavy rainfall. Cracks appeared on the asphalted roadway, and the slipped area included the road surface and forest.

The cause of the landslide was the increased amount of surface water that flowed into the landslide area and the saturation of the soil in the embankment. Geological investigations were carried out (execution of exploratory boreholes, engineering geological mapping and laboratory tests).

Results

Furthermore, two proposals for landslide remediation are presented in the diploma thesis. The first variant is remediation with a supporting stone masonry structure. A supporting stone masonry structure is chosen if the terrain configuration allows the execution of a working platform from which excavation for the foundation of the stone masonry structure is possible to a depth of 4.5 m below the level of the working platform.

The greatest advantage of stone masonry is the simple drainage of hinterland waters, as it contains little concrete (up to 30 per cent) and is consequently water-permeable. Water is precisely the biggest problem with earth landslides, as for successful landslide remediation, water needs to be diverted outside the landslide area. The second variant of landslide remediation is a reinforced concrete anchored pile wall, which needs to be executed in very steep areas and where the solid base is too deep and stone masonry could not be executed.

For both remediation proposals, I present the execution procedure of the structures and the material required for this. In the sixth chapter, for the cost comparison of both solutions, design estimates are provided for both structures, which also form the basis for evaluating the hypotheses stated in the introduction and explained in the conclusion. In the umbrella part, research is carried out on the carbon footprint of the basic building elements of stone masonry and the anchored pile wall.