The paper describes model tests on flood embankments, performed within the frame of EC 6th Framework Integrated Project FLOODsite (LEŚNIEWSKA et al. 2007). It is focussed mainly on presenting physical phenomena observed during the tests and related to air entrapment within embankment body and its subsequent release. The most important conclusion derived from recent tests is the existence of clear relationship between air entrapment and release and failure of internal embankment structure. Primary results of deformation of the embankment with a help of PIV analysis are also presented in the paper, showing air trapping influence on the embankment global failure mechanism.
The paper compares the results of a study on a plane physical model of a flood embankment with the outcome of a numerical modeling using the finite element method (FEM). The numerical modeling was performed with the PLAXIS software package while the empirical data were processed with the geoPIV programme. Two types of model studies were completed, consisting of alternately raising (up to complete flooding) and lowering (to complete desiccation) the water table which affected the flood embankment model. The objective of the study was to assess the applicability of the particle image velocimetry (PIV) method to analyzing deformations of a flood embankment under changeable hydrological conditions. Qualitative agreement was found between the empirical and numerical displacement fields in the body of a flood embankment.
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