Etienne Gonzalez, PhD student
Research topic: Experimental study of the behavior and performance of geosynthetic-encased columns in laponite
Previous degree(s): MSc. EFPL, Switzerland; B.Eng. UNAM, Mexico
Fun fact: I enjoy repairing my old car.
Description of research
My research focuses on experimentally studying the behavior and performance of Geosynthetic-Encased Columns (GECs) installed in laponite, a transparent clay surrogate. GECs consist of a granular column encased in a cylindrical geotextile and are implemented as a ground improvement technique. While previous laboratory research has studied parameters like GEC geometry and materials, questions remain regarding the actual level of strength improvement achieved and how stresses are transferred through the GEC system under embankment loading conditions. The objectives are to evaluate the effects of parameters like encasement stiffness and column size on the overall composite strength and load transfer; measure radial and vertical strains during loading and imaging techniques; compare experimental results to analytical prediction methods; and validate the laboratory modeling methodology. A unique large-scale laboratory model is developed, with emphasis on reproducing field conditions through appropriate scaling and boundary conditions.
Other experience
I have over four years of professional engineering experience as a contractor and consultant. I have worked on major infrastructure projects including stabilization of landslides along the Tijuana-Ensenada Highway in Mexico, construction of the Metro line 15 stations in Paris, and deep foundations for high-rise buildings.