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  • In North-western Bohemia the excavated overburden from open-cast coal mines is end-dumped in fills. Clay-type soil prevails among the filled soils. As a consequence of the character and state of the soil, together with the mining and dumping technology, the clay fill comprises a typical lumpy structure. Large and open macrovoids between the single lumps are a characteristic feature of the clay fills. The filled overburden forms spoil heaps under high angles of repose (as high as 40 degrees) which is governed by size and shape of the lumps. However these slopes cannot be considered for design of clay fill final slopes. The lumpy clay fill structure is metastable. Structure transitions influencing the mechanical behaviour and thus slope inclination of the heaps are presented in this contribution. Three main agents are responsible for the transitions of the lumpy structure: Plastic straining of relatively weak lumps as a consequence of overburden load; collapse on wetting of the open metastable structure mainly in the early stages after landfilling; and oscillations of matric suction. Long-term monitoring of matric suction in years 2004 - 2008 at depths up to 2 metres in the low-gradient slope of the reclaimed clay fill in the Bilina mine show clear seasonal suction oscillations. (C) 2014 Elsevier B.V.
  • In North-western Bohemia the excavated overburden from open-cast coal mines is end-dumped in fills. Clay-type soil prevails among the filled soils. As a consequence of the character and state of the soil, together with the mining and dumping technology, the clay fill comprises a typical lumpy structure. Large and open macrovoids between the single lumps are a characteristic feature of the clay fills. The filled overburden forms spoil heaps under high angles of repose (as high as 40 degrees) which is governed by size and shape of the lumps. However these slopes cannot be considered for design of clay fill final slopes. The lumpy clay fill structure is metastable. Structure transitions influencing the mechanical behaviour and thus slope inclination of the heaps are presented in this contribution. Three main agents are responsible for the transitions of the lumpy structure: Plastic straining of relatively weak lumps as a consequence of overburden load; collapse on wetting of the open metastable structure mainly in the early stages after landfilling; and oscillations of matric suction. Long-term monitoring of matric suction in years 2004 - 2008 at depths up to 2 metres in the low-gradient slope of the reclaimed clay fill in the Bilina mine show clear seasonal suction oscillations. (C) 2014 Elsevier B.V. (en)
Title
  • Transitions in structure of clay fills due to suction oscillations
  • Transitions in structure of clay fills due to suction oscillations (en)
skos:prefLabel
  • Transitions in structure of clay fills due to suction oscillations
  • Transitions in structure of clay fills due to suction oscillations (en)
skos:notation
  • RIV/00216208:11310/14:10293221!RIV15-MSM-11310___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 51051
http://linked.open...ai/riv/idVysledku
  • RIV/00216208:11310/14:10293221
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Matric suction oscillations; Structure degradation; Lumpy soil; Clay fill (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [8A76DEF59D58]
http://linked.open...v/mistoKonaniAkce
  • Naples, ITALY
http://linked.open...i/riv/mistoVydani
  • AMSTERDAM
http://linked.open...i/riv/nazevZdroje
  • THIRD ITALIAN WORKSHOP ON LANDSLIDES: HYDROLOGICAL RESPONSE OF SLOPES THROUGH PHYSICAL EXPERIMENTS, FIELD MONITORING AND MATHEMATICAL MODELING
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Kostkanová, Vladislava
  • Boháč, Jan
  • Herle, Ivo
http://linked.open...vavai/riv/typAkce
http://linked.open...ain/vavai/riv/wos
  • 000345396400016
http://linked.open.../riv/zahajeniAkce
issn
  • 1878-5220
number of pages
http://bibframe.org/vocab/doi
  • 10.1016/j.proeps.2014.06.011
http://purl.org/ne...btex#hasPublisher
  • ELSEVIER SCIENCE BV
http://localhost/t...ganizacniJednotka
  • 11310
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