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TUTCRIS

Back-calculation of the Saint-Alban A test embankment with a new modelling approach in LEM

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Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoProceedings of the The 17th Nordic Geotechnical Meeting, Reykjavik Iceland
Alaotsikko25th - 28th of May 2016
Sivut691-699
Sivumäärä9
ISBN (elektroninen)978-9935-24-002-6
TilaJulkaistu - 2016
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaNORDIC GEOTECHNICAL MEETING -
Kesto: 1 tammikuuta 1900 → …

Conference

ConferenceNORDIC GEOTECHNICAL MEETING
Ajanjakso1/01/00 → …

Tiivistelmä

To facilitate the continued use of limit equilibrium method (LEM) in stability design of embankments on soft clays, the new calculation method “Hybrid su” (HSU) has been developed. It is used to derive undrained shear strength from effective strength parameters, or to predict the excess pore pressure at failure. The HSU method uses an anisotropic effective stress soil model with volumetric hardening, from which a closed form solution for the effective mean stress at failure p’f is derived. This in turn is used to derive the anisotropic undrained shear strength (for use in total stress analyses), or excess pore pressure (for use in undrained effective stress analyses). The model accounts for factors such as anisotropy, consolidation state, volumetric hardening and to some extent, rate effects. An advantage of the model over traditional undrained effective stress calculations is that the overestimation of shear strength at F > 1 is avoided.

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