Sedimentary Environment and Geotechnology in the Post-glacial Sediments from Drammen, Near Oslosfjord, Norway.
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Accession number;02A0568394
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| Title;Sedimentary Environment and Geotechnology in the Post-glacial Sediments from Drammen, Near Oslosfjord, Norway. |
| Author;
KAMEI TAKESHI
(Shimane Univ., Interdisciplinary Faculty of Sci. and Engineering, JPN)
ISHIHARA HIROKAZU
(Nihonkensetsukikaikaken)
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Journal Title;Journal of the Japan Society of Engineering Geology
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Journal Code:G0269B
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ISSN:0286-7737
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VOL.43;NO.2;PAGE.92-100(2002)
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| Figure&Table&Reference;FIG.7, TBL.2, REF.29 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Drammen is located 40km southwest of Oslo, in the valley of the Drammen river. The landscape consists of terraces of post-glacial marine clay. CNS elemental analysis was performed on Drammen clay to investigate the relationship between total sulfur (TS), total organic carbon (TOC) and total nitrogen (TN) in the post-glacial sediments from Drammen, near Oslosfjord. A simplified method for distinguishing freshwater sediments from marine sediments based on TOC and TS has already been proposed. The method was defined as the weight ratio of organic carbon to pyrite sulfur (C/S). Variations in TS, TOC and TN with depth were determined. The principle of this method is also useful for evaluating sedimentary environments, namely normal post-glacial marine sediments and fresh water sediments poor in organic matter. In addition, an attempt was made to determine calcium carbonate contents of the actual specimens used for assessing engineering characteristics. The variation of calcite (CaCO3) content within natural soils with respect to depth and its effect on strength-deformation characteristics is also investigated. The results show that strength-deformation characteristics generally increase with increasing CaCO3 content of the soils. Use of the CNS elemental analysis makes such determinations relatively quick and inexpensive and is recommended. (author abst.) |
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