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Record nummer 2253749
Titel Implementation of the New Dutch Guidelines on the Macrostability Assessment of Dikes using Different Constitutive Models : Case study: KIJK Dike in the Netherlands
Auteur(s) Iereidis, C.
Uitgever Delft : T.U. Delft
Jaar van uitgave 2019
Pagina's 161 p
Online full text
Publicatie type Studentenverslag
Taal Engels
Toelichting (Engels) The National Flood Protection Program (HWBP) periodically calls for safety assessments to ensure that the primary flood defenses in the Netherlands meet the safety standards. During the 3rd National Testing Round (LRT3) it was established that a large portion of the KIJK dike which serves as a primary flood protection of the adjacent Hollandsche IJssel failed to comply a macrostability inspection of its inner slope. The macrostability of the dike is of critical importance in the safety analysis since this can lead to severe outcomes (e.g. fatalities and economical losses). Nowadays in the Netherlands there is an explicit cluster, namely POV-M which deals with this assessment. The efficiency is achieved through the development of concrete and unequivocal guidelines. These guidelines are applied in successive phases which are implemented in the stage construction mode of PLAXIS finite element code with the final aim to determine the FoS (factor of safety) of the dike at critical loading under undrained conditions using the CSSM (Critical State Soil Mechanics) framework. The FoS is determined with the use of the strength reduction method. Moreover, the CSSM framework is coupled with the SHANSEP (Stress History and Normalized Soil Engineering Properties) concept enabling the incorporation of the effect of stress history and the stress path characterizing the undrained shear strength in the design. The CSSM framework is applied in the design by determining the strength parameters of clays from an axial strain level equal to 25% under triaxial compression whereas for peats at 40% shear strain level under direct simple shearing conditions. In this study the strength parameters were additionally determined from the service conditions strain levels which are the 2% and 5% strain levels for clays and peats, respectively.
Betrokken instanties Technische Universiteit Delft
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