Article

Construction of a highway embankment on thick marshy ground

Article

Construction of a highway embankment on thick marshy ground

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Abstract

A section of a bypass motorway north of Kaposvár, South Hungary, was to traverse a fishpond in a length of 150 metres field up with thick (up to 7 meters), fresh, water-logged, organic sediments. Removal of the thick, soft soil was disregarded of enormous costs. In order to prevent base failure stage construction has been adopted using counter-weight berms. By continuous monitoring of settlements, it has been possible to control construction and reliably predict final consolidation settlements.

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... As can be seen from Table 2, the other index properties generally fall within the ranges quoted in the literature for peats from other countries (Adams 1965;Edil and Mochtar 1984;Yamaguchi et al. 1985;Hanzawa et al. 1994;Fox and Edil 1996;Moczar 2003;Masawi 2004;Duraisamy et al. 2007;Dykes et al. 2008), although some dry unit weight and specific gravity values are higher. Hobbs (1986) presented a summary of the bulk density values of some UK mires as a function of water content (Fig. 8). ...
Article
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.
Alapozás kedvezőtlen talajon, Akadémiai kiadó
  • L Rétháti
RÉTHÁTI, L., Alapozás kedvezőtlen talajon, Akadémiai kiadó, Budapest, 1994.