Educational Module to Demonstrate the Seismic Behavior of Piles in Improved and Unimproved Soft Soils

Abstract

This engineering educational module on the behavior of piles in soft clays during earthquake loading sought to introduce engineering as a viable career to eighth graders and teach students how geotechnical engineers design foundations in marginal soils to minimize damage to infrastructure during earthquakes. This module could also be used at various educational levels, from elementary to middle and high school, as well as at the undergraduate level, with appropriate modifications. A 5-h module was created to simulate the real-world behavior of piles in soft clays during earthquake loading and visually show the improvement in how these same piles behave after being stabilized with a deep-soil-mixing technique. In this module, soft soil was simulated using Jell-O, piles were simulated using Slim Jims, and soil stabilization was simulated using peanut butter, marshmallows, or cheese. Each student group had to design a stabilization procedure to improve the behavior of the piles. The students competed to see who could design a stabilized pile with the least amount of deflection for the least amount of money. An abbreviated module was also administered to a group of middle-school science and mathematics teachers. The students’ and teachers’ learning and perceptions were assessed by administering pre- and post-assessment questions, which were matched.