Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
In situ study of the shrinkage-swelling of a clay soil over several cycles of drought-rewetting
Abstract This article presents results describing the in situ behavior of clay soils (Pleistocene Brach formation) regarding shrinkage and swelling; an experimental site was established. Different types of sensors were used to continuously measure the movements of the clay bed-rock and variations in the temperature and water content of the soil. These parameters were correlated with annual climatic variations as measured at an on-site meteorological station. The results obtained thus far represent five cycles of drought-rewetting, thus enabling a medium-term study of the shrinkage-swelling of a clay soil over time. A cumulative effect of shrinkage over several cycles was observed with non-negligible variations of water content to a depth of 3m. Almost 1cm of cumulative shrinkage occurred over the first three cycles of a 2-meter-thick clay layer. The last two cycles were marked by a stabilization of the swelling. By determining the accumulated soil hydric condition over time, we discovered a correlation between this parameter and the periods of shrinkage-swelling. The accumulated hydric condition, as defined in this article, is a good indicator of the behavior of soil under shrinkage and swelling.
Highlights An observation of soil displacements over five cycles of shrinkage-swelling is proposed. Water content is correlated with temperature and displacement. The influence of heterogeneous lithology is observed on the soil behavior. The accumulated hydric condition is a good indicator of the behavior of soil under shrinkage and swelling.
In situ study of the shrinkage-swelling of a clay soil over several cycles of drought-rewetting
Abstract This article presents results describing the in situ behavior of clay soils (Pleistocene Brach formation) regarding shrinkage and swelling; an experimental site was established. Different types of sensors were used to continuously measure the movements of the clay bed-rock and variations in the temperature and water content of the soil. These parameters were correlated with annual climatic variations as measured at an on-site meteorological station. The results obtained thus far represent five cycles of drought-rewetting, thus enabling a medium-term study of the shrinkage-swelling of a clay soil over time. A cumulative effect of shrinkage over several cycles was observed with non-negligible variations of water content to a depth of 3m. Almost 1cm of cumulative shrinkage occurred over the first three cycles of a 2-meter-thick clay layer. The last two cycles were marked by a stabilization of the swelling. By determining the accumulated soil hydric condition over time, we discovered a correlation between this parameter and the periods of shrinkage-swelling. The accumulated hydric condition, as defined in this article, is a good indicator of the behavior of soil under shrinkage and swelling.
Highlights An observation of soil displacements over five cycles of shrinkage-swelling is proposed. Water content is correlated with temperature and displacement. The influence of heterogeneous lithology is observed on the soil behavior. The accumulated hydric condition is a good indicator of the behavior of soil under shrinkage and swelling.
In situ study of the shrinkage-swelling of a clay soil over several cycles of drought-rewetting
Fernandes, Marion (Autor:in) / Denis, Alain (Autor:in) / Fabre, Richard (Autor:in) / Lataste, Jean-François (Autor:in) / Chrétien, Marie (Autor:in)
Engineering Geology ; 192 ; 63-75
29.03.2015
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
In situ study of the shrinkage-swelling of a clay soil over several cycles of drought-rewetting
| British Library Online Contents | 2015
In situ study of the shrinkage-swelling of a clay soil over several cycles of drought-rewetting
| Online Contents | 2015
Shrinkage and swelling of clay soil
| Taylor & Francis Verlag | 2011
Swelling—Shrinkage Properties of Expansive Moreland Clay
| British Library Conference Proceedings | 2018