Observational method applied to the decision optimizing of foundation method in Kujala Interchange on silty clay subsoil

Monica Löfman*, Leena Korkiala-Tanttu

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

1 Sitaatiot (Scopus)
71 Lataukset (Pure)

Abstrakti

Observational method is a powerful approach to dealing with uncertainty in subsoil conditions. In the presented case study, Kujala Interchange, constructing test embankments and applying the observational method enabled to replace many initially planned pile slab foundations with ground-supported road embankments. The residual settlements of these embankments were controlled by means of preloading accompanied with monitoring. This paper demonstrates how a decision tree analysis can be employed to assess the feasibility of constructing the test embankments. The prior probability of acceptable settlements of the ground-supported embankments is estimated for a typical soil profile in Kujala area via Monte Carlo simulation. This prior probability is then updated via monitoring results and Bayes’ theorem. Lastly, the expected costs of each design alternative are derived based on their respective probabilities and the actual cost savings acquired at Kujala Interchange. The results of the decision tree analysis confirm that constructing the test embankments and minimizing the pile foundations were the optimal decision in this case study. In sum, this paper shows how the observational method can be employed to reduce the expected costs and environmental impact of foundation design characterized by significant uncertainty in subsoil conditions. However, it is concluded that besides monetary costs, one should also include non-monetary consequences such as carbon dioxide emissions.

AlkuperäiskieliEnglanti
OtsikkoAdvances in Transportation Geotechnics IV - Proceedings of the 4th International Conference on Transportation Geotechnics Volume 3
ToimittajatErol Tutumluer, Soheil Nazarian, Imad Al-Qadi, Issam I. A. Qamhia
KustantajaSpringer
Sivut739-751
Sivumäärä13
ISBN (elektroninen)978-3-030-77238-3
ISBN (painettu)978-3-030-77237-6
DOI - pysyväislinkit
TilaJulkaistu - 2022
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaInternational Conference on Transportation Geotechnics - Virtual, Online
Kesto: 23 toukok. 202126 toukok. 2021
Konferenssinumero: 4
http://conferences.illinois.edu/ICTG2020/

Julkaisusarja

NimiLecture notes in civil engineering
Vuosikerta166
ISSN (painettu)2366-2557
ISSN (elektroninen)2366-2565

Conference

ConferenceInternational Conference on Transportation Geotechnics
LyhennettäICTG
KaupunkiVirtual, Online
Ajanjakso23/05/202126/05/2021
www-osoite

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