Oedometer Tests:an aid in determination of the geological load history

• Main Author: Thorsen, Grete
• Format: Article in Journal/Newspaper
• Language: English
• Published: 1996
• Subjects: Oedometer Tests; Preconsolidation Pressure; Weichselian Ice Age; Eemian Fresh Water; Ice Sheet
• Online Access: https://vbn.aau.dk/da/publications/827eaf90-8093-11db-8b97-000ea68e967b

The paper describes the results of oedometer tests carried out with samples from Eemian fresh-water deposits and the methods used to determine the preconsolidation pressure from the test results. The influence of creep in the material on the apparent preconsolidation pressure is estimated from a model set up by Moust Jacobsen in 1992. The test results do not show any significant difference in the determined values of the overconsolidation ratio (OCR) for the samples from Hollerup and Solsø, east and west of the main stationary line for the last ice sheet in Weichselian, respectively. The results, however, tell nothing about the kind of actions, which has caused the overconsolidation. The determined OCR-values might be due to previous ice caps but a big difference in the two values from Solsø indicates a considerable influence from other actions. The sediments from Hollerup and Solsø are not identical, and the effect of temperature, chemical and biological processes on the apparent preconsolidation pressure has not been evaluated.