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Warianty tytułu
Characterization of deformation changes in anthropogenic soil from the wet dumps of sugar factories
Języki publikacji
Abstrakty
Sewer sludge that fills four wet dumps of the closed Małoszyn Sugar Factory in Malczyce near Środa Śląska, Lower Silesia constitutes a very specific anthropogenic soil. It is composed of grains and mineral particles transported in suspension after sugar beets pre-processing treatment. Presently the wet dumps are to be recultivated to meet the requirements of environmental protection. According to the recultivation project the wet dumps will be backfilled with suitable waste material and covered with sand and soil to stimulate soil forming processes. Finally grass, clover and shrubs will be introduced. The recultivation layer thickness will reach 3-6 m. Anthropogenic soil that fills the wet dumps is up to 2-3 m thick. The grain-size distribution is generally consistent with silty loam, silty clay loam and silty clay. Quartz, illite and chlorite dominate the mineral composition. The wet dump's bottom is formed by clays of the Poznań Formation, practically impermeable. Silt-dominated soils deposited in a water environment are highly susceptible to deformations caused by water and overload. Deformation behaviour was studied for the soil in a semi-solid state as well as in a soft-plastic state. Varying influence of water results, among others, in shrinkage (Ls) and swelling of the soils, characterized in the present study by swelling strain (p). Load-induced deformation of the soils is described basing on the modulus of primary compressibility. Basing on the results obtained it may be stated that the investigated anthropogenic soil undergoes moderate deformations under the influence of water. The swelling strain does not exceed 0.5-1.2% for the soil in a soft-plastic state and amount to 3.1-4.3% in a semi-solid state. The soil shrinkage limit varies between 3 and 5%. On the other hand load-induced deformations will be of remarkably higher importance. The soil in a soft-plastic state shows high shrinkage that is comparable with the one for organic soils. The modulus of primary compressibility is 282.3-925.9 kPa. The compressibility is markedly lower for a semi-solid state (MO =1 190.5-2 000 kPa). Characteristically, in both soft-plastic and semi-solid states the soil shows higher compressibility for lower load values 0-50 kPa than for the higher range 0-200 kPa. These compressibility values should be taken into account during backfilling of the wet dumps with various safe waste materials at recultivation. The load-induced pressure, initially low, will increase with adding consecutive layers. Thus highest soil deformations should be expected during the initial backfilling stages and their intensity may be estimated using the modulus of primary compressibility.
Czasopismo
Rocznik
Tom
Strony
892--897
Opis fizyczny
Bibliogr. 13 poz., rys., tab., wykr.
Twórcy
autor
- Instytut Nauk Geologicznych, Uniwersytet Wrocławski, pl. Maksa Borna 9, 50-204 Wrocław, krystyna.choma-moryl@ing.uni.wroc.pl
Bibliografia
- CHOMA-MORYL K. 2004 - Badania wybranych gruntów spoistych z terenu Dolnego Śląska jako uszczelnień składowisk odpadów komunalnych. Acta Univ. Wratisl. Hydrogeol., 2599.
- DRĄGOWSKI A., CABALSKI K. & RADZIKOWSKI M. 2002 - Badania bezpośrednie procesów samouszczelniania się składowisk mokrych na przykładzie składowiska w Przeworsku. Prz. Geol., 10: 975-979.
- DRĄGOWSKI A. 1981 - Inżyniersko-geologiczna charakterystyka niszczenia skał mastrychckich Wyżyny Lubelskiej w wyniku pęcznienia i skurczu. Biul. Geol. Uniw. Warsz., 29: 5-104.
- GLAZER Z., DOMAGAŁA M., DRĄGOWSKI A., KACZYŃSKI R. & WYSOKIŃSKI L. 1971 - Problematyka badań inżyniersko-geologicznych przy składowaniu odpadów przemysłowych w stawach osadowych. Prz. Geol., 19: 244-248.
- HEAD K.H. 1992 - Manual of soil laboratory testing. T. 1 - Soil classification and compaction tests. Whittles Publishing, London.
- KACZYŃSKI R. 1992 - Anisotropic swelling and shrinkage of Miocene carpatian Foredeep clays. Proceeding 7th International Conference on Expansive Soils, 1: 251-255, Dallas.
- KAŹMIERCZAK U., MILIAN A. & MORYL J. 2010 - Projekt rekultywacji osadników Cukrowni Małoszyn w Malczycach. Arch. KMM Projekt s.c.
- MADSEN F.T. & MÜLLER-VONMOOS M. 1989 - The swelling behaviour of clays. Applied Clay Science, 4: 143-156.
- MORYL J. (red.) 1977 - Geneza i stratygrafia osadów trzeciorzędowych i czwartorzędowych - arkusz Prochowice. PTPNoZ Oddz. Doln., Arch. PROXIMA, Wrocław.
- MYŚLIŃSKA E. 2002 - Laboratoryjne badania gruntów. Wyd. Nauk. PWN, Warszawa.
- PN-88/B-04481 - Grunty budowlane. Badania próbek gruntu.
- SRIDHARAN A. & PRAKASH K. 1998 - Mechanism controlling the shrinkage limit of soils. Geot. Test. Journ., 21: 240-250.
- SZAŁAJDEWICZ J. 1980 - Szczegółowa Mapa Geologiczna Polski w skali 1 : 50 000, ark. Prochowice. Objaśnienia. Wyd. Geol., Warszawa.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUS6-0023-0049