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    Wyświetlanie 1-9 z 9
    Tytuł:
    Zależność między wilgotnością a ciśnieniem ssania w profilu mio-plioceńskich iłów na Stegnach
    The relationship between water content and suction pressure in Mio-Pliocene silts in Stegny profile (Poland)
    Autorzy:
    Wójcik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074357.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    soil suction
    soil-water characteristic curve
    mio-pliocene clay
    Opis:
    The soil-water characteristic curve for a soil is defined as the relationship between water content and suction for the soil. It can be used to estimate various parameters which describe unsaturated soil behaviour. The paper presents the results of investigation of cohesive soils from the Warsaw area. As a result of the comprehensive studies the fundamental relationship between the soil suction and water content for mio-pliocene clay from Stegny was established. Using Fredlund and Xing (1994) equation the best-fit curves for experimental data are presented.
    Źródło:
    Przegląd Geologiczny; 2005, 53, 8; 699--702
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie właściwości ekspansywnych iłów neogeńskich z Mazowsza
    Comparison of expansive properties of Neogene clays from the Mazovia region
    Autorzy:
    Gawriuczenkow, I.
    Wójcik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075056.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    expansion
    Neogene (Mio-Pliocene) clay
    swelling pressure
    mineral composition
    clay fraction
    ekspansywność
    iły neogeńskie
    ciśnienie pęcznienia
    skład mineralny
    zawartość frakcji iłowej
    Opis:
    Development of building projects in the Mazovia region causes the risk of their location on the soils of specific expansive properties. These properties, expressed as swelling or shrinkage, are a serious engineering problem. Many methods are used for the evaluation ofexpansiveness; both direct and indirect test methods are used. Tests were performed on clays from the areas of Warsaw, Dobre near Mińsk Mazowiecki and Mszczonów. Comparative analysis of expansive properties of Neogene clays is based on the results of laboratory tests of mineral composition, grain size distribution, moisture content, free swelling and swelling pressure. The tests have shown that the expansive properties ofclays from the Mazowsze region can have extremely high values, which causes the needfor individual determination of potential expan-siveness for different types of clays, depending on moisture content, swelling pressure and chemistry of the environment.
    Źródło:
    Przegląd Geologiczny; 2013, 61, 4; 243--247
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ struktury na skurczalność gruntów spoistych
    The influence of soil structure on clay soil shrinkage
    Autorzy:
    Izdebska-Mucha, D.
    Wójcik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075049.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    shrinkage curve
    shrinkage limit
    clay soil
    soil structure
    void ratio
    skurczalność gruntu
    granica skurczalności
    grunt spoisty
    struktura gruntu
    wskaźnik porowatości
    Opis:
    This paper deals with the structural factors affecting shrinkage phenomena. Seventy eight soil samples were tested, including: Neogene (Mio-Pliocene) clays, glacial tills, clayey alluvial soils, bentonite, illitic clay and kaolinite. Destructed soils (remoulded samples) were compared with undisturbed soils (NNS). Analysis of shrinkage curves showed that the most hydrophilic clays and well-graded soils have the lowest void ratio and shrinkage limit. Shrinkage curves ofsilty and sandy soils are relatively plane with poorly differentiated shrinkage stages. For Neogene clays, shrinkage curves of remoulded samples are similar to the undisturbed ones. Both series of samples yielded similar final void ratio and shrinkage limit values. For alluvial soils and glacial tills, remoulded samples yielded a lower void ratio and higher shrinkage limit values than NNS samples. The results obtained showed that the soil fabric (natural preserved versus disturbed) does not influence shrinkage of Neogene clays while affects significantly shrinkage of alluvial soils and glacial tills. The statistical analysis revealed that there was no correlation between shrinkage limit and clay content or plastic index. A linear rela¬tionship was found between shrinkage limit and void ratio for clays as well as remoulded samples.
    Źródło:
    Przegląd Geologiczny; 2013, 61, 3; 195--202
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany mikrostrukturalne past gruntowych pod wpływem ciśnienia ssania
    Microstructural changes in remoulded specimens due to suction pressure
    Autorzy:
    Wójcik, E.
    Trzciński, J.
    Łądkiewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075002.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    microstructure
    pore space
    Neogene clay
    suction pressure
    mikrostruktura
    przestrzeń porowa
    iły neogeńskie
    ciśnienie ssania
    Opis:
    This paper presents an issue of microstructural changes in clay soils during the water loss due to increase of suction pressure. The change of microstructure affects the geological engineering properties of soils causes problems with the foundation of buildings. The volumetric changes of cohesive soils, containing significant amounts of clay minerals from the smectite group, are caused by a variable water content in soil. The phenomenon of the moisture change significantly alters the geological engineering properties of these soils as a result of shrinking and swelling. This paper aims at presenting the microstructural changes in remoulded specimens of Neogene clays caused by loss of moisture due to suction pressure. The scientific examination involved quantitative analyses of the microstructure using scanning electron microscopy (SEM) to study pore space details of remoulded specimens. Tested samples from selected levels of the Neogene clays (Poznan Series) were collected from the Warsaw-Stegny area. Samples were taken from a research polygon for these clay soils. The basic geological engineering properties of clay soils and remoulded specimens have been examined after being prepared according to strictly defined procedures. Through successive stages of the suction pressure (from 50 to 1600 kPa), the samples underwent the process of loss of moisture. Application of a novel method of sample preparation procedure for remoulded specimens allowed examining structurally homogeneous soils and obtaining results without an effect of material anisotropy. The qualitative and quantitative analysis of soil microstructures were performed using SEM and STIMAN software for quantitative images processing. The analysis allowed determination of the number of geometric and morphometric parameters of the microstructure with high accuracy. Based on this study, significant qualitative and quantitative changes in loss of moisture due to suction pressure in the process of remoulded specimens were noted along with changes in the microstructure and pore space of clay soils. The obtained results showed the effect of successive stages of "closing" of the structure of cohesive soils. Microstructural changes have a significant influence on the values of clay soil properties during the shrinkage and swelling process, which are caused by changes in the water content.
    Źródło:
    Przegląd Geologiczny; 2013, 61, 1; 74--82
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena możliwości zastosowania metody georadarowej i elektrooporowej do identyfikacji rozluźnionych stref gruntów niespoistych
    Evaluation of the applicability of GPR and resistivity methods for identifying loose zones in non-cohesive soils
    Autorzy:
    Mieszkowski, R.
    Zawrzykraj, P.
    Żmudzin, D.
    Wójcik, E.
    Popielski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075707.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    metoda georadarowa
    GPR
    metoda elektrooporowa
    ERT
    sondowanie dynamiczne
    DPL
    zagęszczenie nasypu
    wskaźnik zagęszczenia
    ground penetrating radar method
    electrical resistivity tomography method
    dynamic sounding
    relative density
    degree of compaction
    Opis:
    The results of the possibility of geophysical methods application (such as geoelectrical ones, including ground penetrating radar and electrical resistivity tomography) to identify areas of loose sands were presented in the article. Registered anomalies obtained from geophysical survey have been verified by geological and engineering tests (drillings and dynamic probing). Measurements were carried out along the part of the lateral earth dam, consisting of man-made soils with a thickness of approximately 7 m and underlying alluvial medium grained sands. The results obtained from the geophysical survey and direct assessment of density by means of dynamic probing allowed to demonstrate the relationship between a specific type of geophysical anomalies and the density of non-cohesive man-made soils.
    Źródło:
    Przegląd Geologiczny; 2017, 65, 10/2; 779--784
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie numerycznych obliczeń stateczności zboczy dla oceny potencjalnych stref przemieszczeń zwietrzelin i koluwiów rozwiniętych na podłożu fliszowym
    Application of slope stability numerical calculation for evaluation of potential displacement zones in weathered and colluvial soils on the flysh base
    Autorzy:
    Dobak, P.
    Gawriuczenkow, I.
    Kaczmarek, Ł. D.
    Kiełbasiński, K.
    Wójcik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075539.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    zbocze
    stateczność
    modelowanie numeryczne
    materiałowy model multilaminate
    zwietrzelina
    development of slope
    stability
    numerical modeling
    multilaminate material model
    weathering
    Opis:
    This study concerns the modeling potential of slopes development with use of numerical stability calculations. Boundary conditions of performed numerical simulations are according to morphological and geological engineering conditions of the flysch slope shaped by weathering and surface mass movements. The multilaminate material model was used in order to imitate shale spatial variation in weathering zones. Furthermore, X-ray computed microtomography technique enabled for visualization of varied condition of shear surface extortion, which cause physical and strength parameters diversity. Calculation outputs show that geometry and location of deformation zones are affected by a model input strength parameter. The presented results confirm utility of numerical modeling as important aspect in the investigation and verification of spatiotemporal slope development cycle.
    Źródło:
    Przegląd Geologiczny; 2016, 64, 9; 683--693
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie metody georadarowej do identyfikacji stref erozji dna rzecznego na przykładzie wybranego odcinka doliny Wisły w Warszawie
    Application of GPR method for identifying riverbed erosion zones on the example of selected section of the Vistula valley in Warsaw
    Autorzy:
    Mieszkowski, R.
    Wójcik, E.
    Żmudzin, D.
    Szwarc, A.
    Sosnowska, A.
    Popielski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075716.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    metoda georadarowa
    GPR
    dolina Wisły
    erozja
    ground penetrating radar method
    Vistula riverbed
    erosion processes
    Opis:
    In the article the occurrence ofseveral natural thresholds in Vistula River valley was discussed. These forms are stabilizing river channel regime and impeding shipping at the same time. The example of application of ground penetrating radar (GPR) for detecting and identifying the erosion zones in the bottom of the river valley was presented. The investigations were carried out along the chosen section of Vistula River in the vicinity of Gdansk Bridge (Most Gdański) in Warsaw. The survey was conductedfrom a motorboat with the MALA GroundExplorer (GX) georadar system installed with 160 MHz screen antenna. The prospection down to 7.5 m below the water surface was obtained. The applied methodology allowed to obtain radar echograms indicating the following anomalies: from the river bottom, from cohesive soil (includingNeogene clays) andfrom thresholds (noticeably elevatedforms in the bottom). In identifying and interpreting georadar anomalies, archival boreholes data were used.
    Źródło:
    Przegląd Geologiczny; 2017, 65, 10/2; 785--789
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Źródła w zlewni górnej Wołosatki w Bieszczadach Wysokich
    Springs of the upper Wołosatka River catchment in the Wysokie Bieszczady Mountains
    Autorzy:
    Rzonca, B.
    Kołodziej, A.
    Laszczak, E.
    Mocior, E.
    Plenzler, J.
    Płaczkowska, E.
    Rozmus, M.
    Siwek, J.
    Ścisłowicz, B.
    Wójcik, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074599.pdf
    Data publikacji:
    2008
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    źródła
    źródło wody
    Bieszczady
    rzeka Wołosatka
    Karpaty zewnętrzne
    springs
    spring hydrology
    Bieszczady Mountains
    Wołosatka River
    Outer Carpathians
    Opis:
    Paper presents results of mapping of springs of the upper Wołosatka River catchment (Wysokie Bieszczady Mts. -Outer Carpathians). Springs were the most common outflow type in the area (52.55%). Outflow density in the area studied (8.32 km2) was equal 23.56 per km2, while spring rate was 12.4 per km2. Outflow discharges were low and very low- most springs belong to Meinzer classes VI-VIII. Only seven springs had discharges higher than 0.5 dm3/s, and three-over 1 dm3/s. The spatial outflow distribution strongly depends on geology, tectonics and river valley direction. High density of outflows was especially observed within the Bukowe Berdo anticline, where the Otryt sandstones are alternated by thin-bedded flysch of high shale content. All these layers dip down in the opposite direction to the slope, which creates numerous springs and other outflows. Furthermore, a spectacular spring line is visible in the field lying along the Halicz fault.
    Źródło:
    Przegląd Geologiczny; 2008, 56, 8/2; 772-772
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ropa naftowa i gaz ziemny w Polsce : obszary perspektywiczne oraz postępowanie przetargowe w 2018 r. (część I)
    Oil and gas in Poland : prospects and licensing rounds in 2018 in terms of hydrocarbon concessions (part I)
    Autorzy:
    Jagielski, G.
    Feldman-Olszewska, A.
    Janas, M.
    Kiersnowski, H.
    Krzyżak, E.
    Podhalańska, T.
    Roszkowska-Remin, J.
    Sobień, K.
    Wójcik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075843.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    koncesje na poszukiwanie
    rozpoznawanie węglowodorów
    eksploatacja węglowodorów
    Ministerstwo Środowiska
    concessions for prospection
    exploration of hydrocarbons
    exploitation of hydrocarbons
    Polish Ministry of the Environment
    Opis:
    On the 28th of June 2017, the Polish Ministry of the Environment announced the boundaries of the tender areas selected for the third licensing round for concessions for prospection, exploration and exploitation of hydrocarbons. This round is going to be proceeded in the 4th Quarter of 2018 and 1st Quarter of 2019. The geologists of the Polish Geological Survey selected 15 tender areas (promising for discoveries of conventional and unconventional oil and gas fields) based on the geological data resources stored in the National Geological Archive, other published data, as well as the knowledge and experience of employees of the Polish Geological Institute - National Research Institute and the Polish Ministry of the Environment. All selected areas are located onshore. In this article we describe 10 tender areas located in the Gdańsk, Pomerania and Wielkopolska petroleum provinces. Other tender areas situated in the Carpathians (Błażowa, Proszowice W, Rudnik-Lipiny, Wetlina) and in the Lublin Petroleum Province (Ryki) will be discussed in the next publication. Three areas: Wejherowo, Bytów and Braniewo-Miłakowo are located in the northern Poland (Gdańsk Petroleum Province). The exploration targets of these areas are generally related to structural-lithological traps in the Middle Cambrian beds of the Baltic Basin, as well as to unconventional shale oil and gas in the Lower Paleozoic. Seven tender areas are situated in the northwestern Poland (Pomerania and Wielkopolska Petroleum Provinces). Three of them - Chodzież, Piła and Leszno are dedicated to conventional gas deposits in the Rotliegend sandstones and, in some cases, also oil deposits in the Zechstein/Main Dolomite. Excluding the Leszno tender area, chances for tight gas discoveries exist within the Rotliegend sandstones. The exploration target of the Konin tender area is related to possible conventional fields in the Jurassic and Lower Cretaceous beds. In the Pomerania region the exploration target is generally related to conventional hydrocarbon deposits in the Devonian, Carboniferous and Permian (Rotliegend and Zechstein/Main Dolomite). Three tender areas are situated within the region of: Sierpowo, Orle and Chełmno. As a rule, a concession is granted for a period of 10 to 30 years and is divided into 2 phases: 1) prospecting and exploration phase (which lasts from 4 to 5 years and can be extended to another 2-year period), 2) production phase. Every entity interested in obtaining a concession needs to undergo the qualification procedure. We believe that this publication will contribute to better understanding of the offered tender areas and encourage activity in the Polish oil and gas sector.
    Źródło:
    Przegląd Geologiczny; 2018, 66, 12; 724--740
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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