The dissertation concentrates on the field of geomechanics. The subject of the study is the presentation of technological procedures in the application of the pilot walls for the stabilisation of landslides. The first part of the dissertation deals with the general theoretical introduction of landslides. There is a relatively detailed description of the long-lasting and momentary factors and of the internal and external forces. These forces are mostly to blame for the emergence of landslides. Next, a classification of the individual types of landslides are given according to their characteristics. They are classified according to the following: the type of land sliding, the structure, velocity and depth and the shape of the sliding surface, and ultimately, the condition of the landslide. In order to achieve the geotechnical reconstruction of the landslides using the pilot walls there needs to be some investigation done, both in the laboratory as well as in situ. Within the framework, the investigations were described using the following: geotechnical boreholes, the standard penetration test, the dynamic penetration test, the pressuremeter test and the inclinometer. The obtained results of the site investigations were further supported by the results in the laboratory. Within the framework there is a description given of both, the one dimensional and triaxial pressure tests, and that of the direct shear test.
In the second part of this dissertation there are a description and a comparison of the procedures for the installation of the pilot walls for the stabilisation of landslides. There is a detailed presentation of the selection of geotechnical types of stabilisation of unstable slopes using the basic building blocks for pilot walls comprising pilots, patches and anchors (active and passive ones). The dissertation provides the description of various technological procedures for the installiation of the pilots. The specific technological procedures were examined for the pilots built in by soil spacing (imprinted or driven in), pilots inserted into the prepared hole (drilled-in pilots), excavated pilots (Benotto pilots) and injected pilots (Jet Grouting pilots). The main emphasis was placed on the technological procedures of implementing drilled pilots (with a column, with bentonite drilling muds, and CFA pilots) because these are the most commonly used for the stabilisation of landslides. The technical principles are underlined by the practical example in which there is a description of the landslide remedial works carried out on the regional road R1-207/1413 Col – Ajdovščina from km 2,400 to km 2,750. Destabilised slope or reconstruction slope has been interpreted in computer programme SLIDE in which i have verified state of load bearing capacity and the limit state of usability. The reconstruction of destabilised slope has been done according to the second engineering approach in accordance with the standard EC7.On the basis of the obtained results it was established that the instalment of the the anchored pilot wall meets the requirements for stabilisation of the slope since the obtained safety factors, which have been accomplished for three different geotechnical profiles, are greater than those defined by the Eurocode standards (FS > 1,25).
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