The paper deals with an issue of closing small communal dumping sites for municipal wastes that, for various reasons, could not meet the legal regulations in force since 2003. One of such dumping grounds is situated in Chełmek Commune, in the west part of Malopolska Voivodship. The currently lasting process of closing it and reclamation encounters problems resulting from technical design as-sumptions of the seventieth. The question of geotechnical stability of the slope of the inclination 1:1 was analysed it the article. An influence of changes of the values of the angle of internal friction of wastes on the obtained values of the safety factor was determined using Bishop's method. The analysis concerns also the influence of the outside load that can occur on the crest of the landfill quarter as well as ground-water conditions in the subsoil. Data for stability calculations were compiled on the basis of the carried out in-situ tests as well as the existing documents concerning the dumping site. The obtained results of calculations show the existing risk of the slope stability loss in the case of certain assumed values of geotechnical parameters and outside loads. There were assumed, for the considered dumping site, three characteristic ...
The paper presents results of shallow landslides research located in Siary near Gorlice in June of 2010. In the frame of investigations were done in-situ tests including evaluation of geologic- engineering condition near the landslides and laboratory tests including determination of geotechnical properties of soils (grain-size distribution, Atterbergs' limits, shear strength parameters). The main part of paper included analysis of infiltration process and its influence on stability of slope. There were used two methods describing water flow through unsaturated soil: piston model of Lumb and Montrasio-Valentino model. Tests and slope stability analysis results proved that main factor controlling failure of analyzed parts of slope were very intense rainfall, which caused saturation of superficial slope layer built of gravelly silt. The another factor which contributed to saturation were impermeable soil layer of cohesive soil. Integrated infiltration and slope stability calculation results using Montrasio-Valentino model revealed its sensitivity on K parameter, which describes drainage capability of soil. It was indicated that K parameter can be interpreted as function of coefficient of permeability. Slope stability calculations made using Montrasio-Valentino model in analyzed case gave less values of stability factors than the ones based of infiltration calculations using piston flow model.
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