The boundary layer effect for multilayered composites with transversal and longitudinal gradation of effective properties for stationary elastic problems was inves-tigated. The consideration was reduced to the one-dimensional stationary problem within the frames of the asymptotic variant of the tolerance modelling – local homoge-nization. The relative difference between two solutions was investigated: the first one was obtained according the asymptotic variant of the tolerance modelling – local homogenization and the second one considered the boundary layer effect for the given type of gradation.

This paper presents an application of calculation scheme of slope stability reliability assessment published by Duncan and Wright in 2005. For the presentation of the calculation procedure, a case study of Warsaw Slope stability in the area adjacent to the rectory of St. Anne Church was analyzed. The shear strength reduction (SSR) technique, belonging to the FEM, was used for the calculation of geometrically spatial deformation state. On the basis of archival materials three sets of strength parameters (the lowest, medium and highst) were selected. Sets of strength parameters were used to safety factors (F) calculations. The results of F calculations were used to estimate the standard deviation and coefficient of variation. Subsequently using correlations made by Duncan and Wright, the probability of failure (Pf) and finally index of reliability (R) were determined. The analysis of stability using the Duncan and Wright method shows the possibility to take into consideration various safety factors, in relation to different strength parameters. Furthermore the used method enables quantitative comparison of various probably of landslide evaluations.

The purpose of this paper is to present how to proceed when choosing the most appropriate variant of household sewage treatment plants that could be built in the villages of dispersed buildings. The scope of work includes the preparation of two variants of the concept of household sewage treatment plants, analyze and choose the most appropriate variant for use in the village Kawęczyn. The paper presents, for what conditions soil-water can be used of household sewage treatment plants under the new Regulation of the Minister of the Environment [2014]. The presented was an analysis of the data collected to design and selected usable in the village Kawęczyn variants of household sewage treatment plants. Design methodology was given for selected variants household sewage treatment plants. The presented was results of hydraulic calculations and chosen were household sewage treatment plants for the analyzed variants. The calculated was cost for designed variants of household sewage treatment plants. The performed an analysis of all the data and selected for the village Kawęczyn variant of household sewage treatment plants with bio filter.

The article presents the research conducted to identify the submergence conditions of the rectangular permeable sill. They were executed as a laboratory tests and analysis aiming at determining the relation describing the submerged flow coefficient (kz). The submerged flow coefficient was calculated on the basis of the submerged to free flow discharge ratio. The analysis include definition of the parameters affecting the values of the submerged flow coefficient and the scientific description of calculation formula. The submerged flow coefficient depends on the ratio of the downstream water depth to the upstream headwater (hd/Hg). The submergence of the permeable sill stream begins when the ratio (hd/Hg) exceeds 0.60. In the initial phase the values of submerged flow coefficient are similar to values given for the permeable sills. The final phase is characterized by submergence flow coefficient similar to values for solid sills.

The paper explains a term of “solar thermal modernization” in the introduction, the term which bases mainly on acquiring and maximal utilization of the solar energy in active and passive systems. The proposal of its utilization in a single-family building was presented, consisting in putting of the optimal solutions into an architectural design, the solutions connected to a house shape, layout of rooms and functional connections, elements of a building structure, its location on the plot with the solution of surroundings and technical equipment. Finally, there was proved that the energy demand diminishes thanks to the applied elements of the thermal modernization.

This note describes the results of analyses of calculating circular tank embedded in an isotropic homogeneous elastic half-space as introduced by Vlasov and compared with analyses of the same tank in discrete soil as introduced by Winkler. The study made an attempt to see how not so widely used theoretical model of soil can influence soil-structure interaction. Based on the finding it was revealed that Vlasov’s elastic subsoil hypothesis is in advantage over Winkler’s model. The theoretical computations were validated by comparing them with the tested model research in very similar conditions to the natural environment. The data from model testing in dry sand and wet sand were collected in 1979.