Suitability of Engineering-Geological Environment on the Basis of Its Permeability Coefficient: Four Case Studies of Fine-Grained Soils
| Autor: | Zofia Zięba, Jolanta Dąbrowska, Dominik Niemiec, Jakub Mońka, Marian Marschalko, David Neuman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Water flow Compaction Soil science Surface finish engineering geology Article Sphericity scanning electron microscope technique General Materials Science methods of permeability coefficient determination Kozeny-Carman Formula Microscopy QC120-168.85 Engineering geology QH201-278.5 fine-grained soils Foundation engineering Slichter Formula laboratory soil permeability testing Engineering (General). Civil engineering (General) soil permeability TK1-9971 Permeability (earth sciences) Descriptive and experimental mechanics Soil water Seelheim Formula Environmental science Electrical engineering. Electronics. Nuclear engineering TA1-2040 soil microstructure |
| Zdroj: | Materials, Vol 14, Iss 6411, p 6411 (2021) Materials Volume 14 Issue 21 |
| ISSN: | 1996-1944 |
| Popis: | The aim of the article is to compare two classifications systems of engineering-geological environment sustainability in terms of its permeability evaluated on the basis of permeability coefficient. The first evaluated classification assumes a permeable environment to be a positive characteristic in the engineering-geological assessment, while the other considers an impermeable environment as favourable. The four fine-grained soil materials were selected, as they had very similar, almost identical grains-size distribution, but different microstructure characterized by grains sphericity, angularity, and roughness. At the same time, the influence of changes in the density of soil materials (density index 10%, 30%, 60%, 90%) was analysed. Permeability coefficient was determined using six methods (empirical formulae, laboratory and microscopic analysis). The laboratory method falling head test (FHT) was taken as a reference test that reflected the actual water flow through the soil. It was found that with an increase in grain angularity and roughness (and a decrease in sphericity), the permeability coefficient was decreasing and this trend culminated along with gradual compaction. Moreover, the research shows that unsuitable methods may classify soil materials into wrong engineering-geological permeability classes, which may have negative consequences during engineering-geological or geotechnical assessment and cause subsequent problems in foundation engineering. Web of Science 14 21 art. no. 6411 |
| Databáze: | OpenAIRE |
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