Geo-engineering properties and settlement of peaty soils at an industrial site (Turkey) |
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Authors: | R Ulusay E Tuncay N Hasancebi |
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Affiliation: | (1) Department of Geological Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey |
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Abstract: | Peats consist of the partly decomposed remains of vegetation, which have accumulated in waterlogged areas. They are often
unsuitable for supporting structures of any kind due to their high water content, high compressibility, low shear strength
and high degree of spatial variability. The paper reports a preliminary study on peats from industrial sites in the city of
Kayseri, Turkey. The soils in the study area are classified as peat to muck. The peats are fibrous at shallow depth and become
amorphous as they extend to some 8 m depth. The ranges of geo-engineering properties are generally consistent with those reported
in the literature, with some variation due to their higher mineral soil contents. The behavior of the peats is essentially
frictional, with high friction and relatively small cohesion. The direct shear tests yielded higher shear strengths than those
from the triaxial tests, due to the fact that the peat specimens used in the direct shear tests were rich in fibers and mineral
soils. Back analysis of the settlement of heavy rolls of metal wires laid on the peat generally confirmed the consolidation
properties of the soil determined in laboratory. |
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