CPTU-based settlement modelling for Kujala test embankments on overconsolidated silty clay: A probabilistic approach
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A4 Artikkeli konferenssijulkaisussa
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Authors
Date
2021-04-26
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
10
Series
IOP Conference Series: Earth and Environmental Science, Volume 710, issue 2021
Abstract
Sounding resistance, such as CPTU cone tip resistance, is often used to estimate the settlement of the subsoil when designing ground-supported structures. This paper utilizes CPTU-based probabilistic modelling to estimate the settlement of two test embankments located in Finland. The model is based on an empirical correlation between CPTU net cone resistance and constrained modulus (M0), described by factor α. Besides the existing correlation (prior distribution of α), this paper also considers the site-specific observations via Bayes’ theorem. By means of Monte Carlo simulation, the settlement histograms were produced and the results compared to the observed settlements. Lastly, the effect of dry crust on the embankment load transmission was considered in order to decrease the model bias. The results indicate that for the other embankment the effect of dry crust has to be considered in order to acquire satisfactory results. It is concluded that this CPTU-based settlement model might be suitable for stiff, overconsolidated silty clay soils in Finland. However, model calibration using site-specific oedometer test data is recommended. On the other hand, such simplified model with a singular modulus should not be used for normally consolidated clay subsoils.Description
Keywords
Other note
Citation
Löfman, M & Korkiala-Tanttu, L 2021, ' CPTU-based settlement modelling for Kujala test embankments on overconsolidated silty clay: A probabilistic approach ', IOP Conference Series: Earth and Environmental Science, vol. 710, no. 1, 012070 . https://doi.org/10.1088/1755-1315/710/1/012070