To illustrate the concept of liquefaction, loose saturated sand is installed inside a 5-gallon bucket, and a metal structure is placed on top of the soil foundation. The instructor puts a static force on the surface of the sand to show that this building appears to be on a solid soil foundation. Subsequently, the bucket is hit repetitively with a rubber mallet to simulate an earthquake force (hard and fast) and students will witness the loss of strength in this soil as the building begins to sink into the soil without any effort. The process of liquefaction and the impact on the strength of the soil is discussed.


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