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This paper is devoted to the specific difficulties connected to construction on problematic soils. Different type of structures like: road embankments, flood control levees, dykes and dams are often located in soft subsoil areas, which consists mainly of peat, calcareous soil with a very high content of calcium carbonate and other high plasticity organic and no organic soils. These soils can be characterized...
The paper treats on hydrological distributed model adaptation for a catchment with significant contribution of wetland. The WetSpa model was applied to analyzing the effects of topography, soil type, and land use cover on the runoff characteristics for upper Biebrza catchment. The derivation of parameter maps and analysis of the daily runoff as reaction of the catchment on rainfall was performed....
To determine the coefficient of consolidation using oedometer laboratory tests usually two common methods are used, Casagrande and Taylor. In the paper, the ACONS apparatus and ClispStudio program is characterized. The methodology and the test results of determination coefficient of consolidation in soft organic soils are presented. In the paper, the laboratory test results obtained from Automatic...
To identify the type of soils in subsoil profile from the dilatometer (DMT) tests the diagram charts are commonly used. Marchetti (1980), Marchetti and Crapps (1981) proposed the diagram chart based on the values of material index (ID) and the dilatometer modulus (ED). This chart is helpful for identifying both mineral (clay, silt and sand) and organic soils. The classifi cation to identify organic...
Derivation of consolidation partial differential equation with non-linear flow characteristics is proposed. The non-linear flow characteristics are obtained from flow-pump test on organic soil and described with empirical relationship. Several reasons were crucial to perform tests on organic soil. Firstly organic soils are very compressible, so that results in high permeability changes. Even with...
The paper is referring to vertical and horizontal laboratory permeability measurements in soft organic soils. The estimation of anisotropic permeability in soft organic soils, as peats, requires to use a special apparatus and the knowledge of proper analysis of the test results. During loading the void ratio decreases substantially that causes the changeability of the permeability. The change of permeability...
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