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Seismic Liquefaction Mitigation and Foundation Stability

Design and construct a scaled foundation system capable of supporting a weighted superstructure atop a saturated granular soil medium during simulated seismic liquefaction events. Participants must devise a mitigation strategy, such as dynamic compaction, soil reinforcement, or drainage systems, to maintain vertical displacement within a 5mm tolerance when subjected to horizontal harmonic excitation. Your final report must include an analysis of pore-water pressure dissipation rates and effective stress distribution across the failure plane.

Materials: Fine-grained sand, plastic container, water, small vibrating motor or eccentric weight mechanism, lead weights, porous mesh fabric, and rulers.

Deadline: October 24, 2026
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Background: NASA/ESA Hubble