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Browsing by Author "Noga, Lech"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Ocena warunków geotechnicznych i standardów jakości osadów dennych dla potrzeb modernizacji kanału miejskiego we Wrocławiu
    (2008) Dzidowska, Krystyna; Noga, Lech
    The paper describes the geotechnical conditions and the quality of the bottom deposits in the invert of the Municipal Interceptor Sewer in Wrocław in view of its upgrading to accommodate a great-flood water flow. On the whole, the soil subbase has been found to be able to carry the load. The Holocene and Pleistocene sand-gravel soils are medium-compacted and compacted. The ground moraine sandy clay is in a hard-plastic state verging on a compact state. The clay stratum should be considered as a tight base to be used in the construction of curtain sealing walls. The bottom deposits in the invert of the sewer, when extracted, would be dangerous to the environment due of their total cadmium, zinc, nickel and mercury content. Because of their pollution by heavy metals, the extracted deposits as waste will have to managed or disposed of. Considering their final destination, the potential and actual environmental hazard which the extracted bottom deposits pose should be assessed by determining the leachability of the heavy metals.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Ocena warunków geotechnicznych podłoża na potrzeby modernizacji jazu na Nysie Łużyckiej przy elektrowni wodnej Zielisko
    (Wydawnictwa AGH, 2008) Dzidowska, Krystyna; Noga, Lech
    The paper presents an assessment of subsoil geotechnical conditions, aimed at eliminating hazards to the planned safe operation of the weir. Borehole drilling and sounding results showed that the subsoil under the weir structure is made up of loose aggregates, clayey aggregates and plastic loams. The adverse condition of the soils had been caused by intensive river water infiltration through the subsoil under the weir. A »hollow channel« filled with clayey suspension was the evidence of intensive tunnelling in the clays and that the tunnelling already assumes the form of a hydraulic punch-through which poses a danger that the soils under the weir will be displaced and as a result the weir will be damaged or destroyed.