Stability of landslide slopes based on physical and mechanical properties of rocks and soils and inclinometer measurements

The subject of the research was to analyse the stability of slopes with varied geological structure covered by landslide processes. Such analyses are usually carried out for landslides where structural protection and construction works are planned. An important element is proper documentation of geological and engineering soil and rock parameters, which should form the basis for stability calculations. The GEO-5 software was used for the calculations – the slope and scarp stability module. The aim of the article is to promote the methodology of documenting geological and engineering conditions in landslide areas. The general characteristics of selected research areas where inclinometer columns were installed and the methods of landslide tests were described. They were applied in accordance with the scheme: field works, laboratory tests, inclinometer measurements, and slope stability calculations for selected calculation sections. Landslides, which were analysed, are located within the Outer Flysch Carpathians, classified as tectonic units: Magura, Silesia, Podlasie, Grybów, as well as the Miechów Basin and the Carpathian Foredeep. Both surface and subsurface parts of each of the selected landslides were studied. The studies allowed the creation of a landslide model based on geological research. As a result of detailed analysis of drill cores and identified shear planes in the form of clear slickenside, the main slip planes were determined. In each landslide area, inclinometer