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Title:
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Experimental investigation on an effective stress law in compacted clayey/silty soil
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Author:
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Alonso Pérez de Agreda, Eduardo; Romero Morales, Enrique Edgar
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica; Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques |
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Abstract:
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Experimental results of isotropic stress tests performed on statically compacted clayey silt are presented to examine the volume change response of the material subjected to controlled increments in net
mean stress and suction within the elastic domain. The results were interpreted with the help of a single effective stress equation –expressed as the sum of two components: the net stress and a fraction of suction– and enabled the determination of the constitutive parameter X entering into the fraction of the prevailing suction. Volume change results on this medium plasticity soil suggest that the proportion of suction contribution to the effective stress is smaller than predicted by the term ‘suction times degree of saturation’ (i.e., X = Sr), generally used in the effective stress expression of Bishop type. Experimental results were fitted to a power law, X = Sr N, where N is a parameter (N > 1) that changed the effect of the degree of saturation. This power law takes microstructural effects into consideration. |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
-Soil compaction--Mathematical models
-effective stress
-compacted soil
-laboratory tests
-Sòls -- Compactació |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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