Počet záznamů: 1  

Grain size distribution of soils within the Cordillera Blanca, Peru: An indicator of basic mechanical properties for slope stability evaluation

  1. 1. 0434609 - USMH-B 2015 RIV CN eng J - Článek v odborném periodiku
    Novotný, J. - Klimeš, Jan
    Grain size distribution of soils within the Cordillera Blanca, Peru: An indicator of basic mechanical properties for slope stability evaluation.
    Journal of Mountain Science. Roč. 11, č. 3 (2014), s. 563-577 ISSN 1672-6316
    Grant CEP: GA ČR(CZ) GAP209/11/1000
    Institucionální podpora: RVO:67985891
    Klíčová slova: moraines * grain size distribution * shear strength * hydraulic conductivity * Cordillera Blanca
    Kód oboru RIV: DE - Zemský magnetismus, geodézie, geografie
    Impakt faktor: 0.963, rok: 2014

    This paper presents results of a study on the mechanical properties of sandy and gravely soils within the Cordillera Blanca, Peru. The soils were divided into groups according to their origin (glacial, fluvial, or debris flow). The grain size distribution of forty three soil samples was used to classify the soils according to the scheme of the Unified Soil Classification System (USCS). These distributions have then been used to estimate shear strength and hydraulic properties of the soils. There are clear differences between the soils which reflect their divergent origins. The glacial soils normally fit within one of two distinctive groups according to the proportion of fines (Group A, 7%-21.5%; Group B, 21%-65%). The estimation of shear strength at constant volume friction angle and peak shear strength of the glacial sediments with low content of fines was made using published data relating to the measured shear strength characteristics of soils with similar origins and grain size distributions. The estimated values were supported by measurements of the angle of repose taken from fourteen samples from two moraines and by shear tests on samples from one locality. The results of the grain size distribution were also used to estimate the average hydraulic conductivity using the empirical Hazen formula which results were verified by field infiltration tests at two localities.
    Trvalý link: http://hdl.handle.net/11104/0238584