Woźniak, Henryk
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Item type:Article, Access status: Open Access , Osiadanie gruntów zwałowanych w poeksploatacyjnym wyrobisku odkrywkowym w wyniku odbudowy zwierciadła wody gruntowej(Wydawnictwa AGH, 2008) Woźniak, Henryk; Borecka, Aleksandra ; Kaczmarczyk, RobertCommon remediation method of inactive open pits is a partial or complete infilling with dump soil derived from removed overburden. A problems which rises during such remediation is a significant settlement of soils caused by its high compressibility. Recognition of compressibility and settlement enables the proper design of both required and final depths of the fill and allows to balance the required and existing volumes of dumped material. Authors proposed a calculation method for settlement of dumped fill deposited in an inactive open pit, which includes self-weight settlement and collapse settlement caused by recovery of groundwater table. The proposed calculation is based upon solution given by Nwabuokei & Lovell (1985) for settlement of fills composed of compacted soil. Examples of calculations are presented in which both the compressibility and collapse potential parameters were determined from authors' own studies.Item type:Article, Access status: Open Access , Determination of quasi-filtration phase of consolidation based on experimental and theoretical course of the uniaxial deformation and distribution of pore pressure(Wydawnictwa AGH, 2016) Olek, Bartłomiej Szczepan; Woźniak, HenrykIn this work the consolidation characteristics of the experimental and theoretical process of consolidation was studied. The analyses were carried out on the basis of the axial soil deformation progress and the pore pressure dissipation. The applied methodology gives possibility for the simultaneous comparison of the experimental and theoretical consolidation data and verification of the validity of calculated values of coefficient of consolidation, estimated using different methods. The aim of this research was to put some light on the quasi-filtration phase of consolidation. The results of consolidation studies on five high quality paste samples prepared from Krakowiec clays showed that the quasi-filtration occurs only in specific stages of the whole process. The analysis of changes in coefficient of consolidation depending on the degree of consolidation, enables the separation of the region of quasi-fixed values of $c_{v}$, which corresponds to the quasi-filtration phase of consolidation.