Wszystkie pola: permeability of cohesive soil - Katalog OPAC zbiorów

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Tytuł:: Zachowania konsolidacyjne past gruntowych jako potencjalnego materiału izolacyjnego
Consolidation behavior of soil paste applied as an potential insulating material
Autorzy:: Dobak, P.
Kowalczyk, S.
Powiązania:: https://bibliotekanauki.pl/articles/2074812.pdf
Data publikacji:: 2010
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: glinka zielona
Bełchatów
przepuszczalność gruntu spoistego
bariery izolacyjne gleby
Neogene green clay
permeability of cohesive soil
insulating soil barriers
Opis:: The paper presents the application of consolidation tests for coefficient permeability evaluation in cohesive soils. The insulating property of Neogene green clays from overburden of Bełchatów lignite mine are subject to study. These soils are potentially fine material to construct barriers for insulating of contaminations. The results of paste samples tests are compared with behavior of non disturbed structure. The difference of natural and artificial formed structure affect on physical properties and permeability behavior too. The continuous loading consolidation tests let to obtain effective seepage of pore water in short time but head gradient is higher than in natural conditions. It caused contraction effects and may decrease the permeability, when pore water pressure is not dissipate. The consolidation stress and pore water pressure is mainly factor of tests results variability. Differences between permeability of samples formed from paste and natural structure samples may depend on mineral composition and compaction of paste. Consolidation tests let quickly evaluate permeability of cohesive soil with respect for the different factors considered in optional barriers designs.
Źródło:: Przegląd Geologiczny; 2010, 58, 9/2; 903-911
0033-2151
Pojawia się w:: Przegląd Geologiczny
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Evaluation of soil permeability from consolidation analysis based on Terzaghi’s and Biot’s theory
Autorzy:: Dobak, P.
Gaszyński, J.
Powiązania:: https://bibliotekanauki.pl/articles/2060271.pdf
Data publikacji:: 2015
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: consolidation
cohesive soils
Terzaghi’s theory
Biot’s theory
permeability
geological barriers
insulation properties
Opis:: Proper evaluation of permeability parameters has a crucial signification in multi-scale prediction of consolidation. Drainage path is connected with the time of one-dimensional consolidation in Terzaghi’s theory and numerous later solutions. That is why the evaluation of permeability factor allows to model the settlement’s time of geological layers based on results obtained on a laboratory scale. Numerous tests show a difference of the consolidation degree obtained from one-dimensional strain course and pore pressure distribution. Evaluation of consolidation coefficient cv based on a newly proposed method allows better understanding of the basic reasons of unconventional behaviour of tested soils. Unparallel characteristics of strain and pore pressure distribution show important role of soil’s skeleton creep and its relation to permeability aspects. Solutions proposed by Biot’s theory allow analysing the different velocity of strain and pore pressure distribution. The article presents a new approximated method based on Terzaghi’s theory and evaluation of parameters which are necessary in application of Biot’s one–dimensional solution. These parameters are connected with compressibility and coefficient of permeability. The goal of presented methodological studies is comparison between permeability obtained from application of Terzaghi’s and Biot’s theory. It allows trying to explain physical reasons of differences between applied models and testing results, and improving the methodology of one–dimensional consolidations tests.
Źródło:: Geological Quarterly; 2015, 59, 2; 373--381
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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