Current Research

_____



objectives of the experimental studies

To perform and interpret suffusion tests under complex hydraulic and mechanical loadings
To characterize the influence of scalping techniques on soils mechanical behavior

To propose and to validate an empirical relationship designed to describe the development of suffusion
To investigate suffusion and the mechanical behavior of eroded soils at the micro-scale (REV of several grains)
To simulate suffusion and its mechanical consequences at the macro-scale (specimens, physical models, real earth structures)



objectives of the numerical studies

RESEARCH

Prior Research

_____

Six devices were already developed in order to study interface erosion and suffusion processes (see publications):

a jet erosion device including the eroded mass measurement. A comparative analysis with the hole erosion test permits to propose an energy based method for providing soil surface erodibility rankings (Regazzoni P.L., 2009)

a large triaxial erodimeter permits the characterization of undisturbed specimens (f 200 or 300mm)

the second triaxial erodimeter is dedicated to fine soils with a multichannel optical sensor to quantify the mass of eroded fine particles (Bendahmane F., 2005)

a rigid wall erodimeter with the measurement of spatial change of density and interstitial pressure along the specimen (Sail Y., 2012)

a centrifuged bench in partnership with IFSTTAR (Le V.D., 2011)

a multidirectional flow erodimeter which permits to perform test directly in the core sample for limiting the disturbance (Le V.T., 2017)

Marot et al. (2012a) and Zhong et al. (2018) investigated the spatial scale effect. Nguyen H.H. (2012) and Rochim A. (2015) investigated the time scale effect.

Moreover, a suffusion erodibility classification was proposed (Marot et al., 2016) and several parametric studies permit to identify the predominant parameters which affect the soil erodibility (Bendahmane et al., 2008; Marot et al., 2009; Regazzoni and Marot, 2011; Marot et al., 2012b; Le et al., 2018).

RESEARCH

Industrial Researches

_____

Current Studies

Oedopermeter tests for geophyConsult

Prior studies related to the soil erosion

Triaxial tests and oedopermeter tests for Compagnie Nationale du Rhone (France)
Jet erosion tests for Town Council of Saint-Nazaire (France)
Large triaxial erodimeter tests for EDF

Small triaxial erodimeter tests and jet erosion test for Charier

Triaxial tests and suffusion tests with the large triaxial erodimeter for Soletanche Bachy, on treated soils.