Retaining walls are common geotechnical engineering applications. Although they appear simple on the outside, there is a bit more that's going on behind them. This video dives deeper into the soil mechanics of retaining walls building on the previous video of introduction to geotechnical engineering. Soil mechanics is absolutely important for this video, our previous video provides a good introduction if you want to get a better understanding of this topic. Geotechnical Series Videos: 1. Understanding why soils fail (https://www.youtube.com/watch?v=5iROUI49Cjw) 2. Understanding the Soil Mechanics of Retaining Walls (https://www.youtube.com/watch?v=YtQ9ubNbytE) 3. Geotechnical Analysis of Foundations (https://www.youtube.com/watch?v=KgKW10iA_4w) 4. The Leading Cause of Foundation Failures (https://www.youtube.com/watch?v=qR5PrbDBCLw) References: [1] C. Clayton, R. Woods, A. Bond and J. Milititsky, Earth Pressure and Earth-Retaining Structures, CRC Press Taylor & Francis Group, 2013. [2] D. P. Coduto, M.-c. R. Yeung and W. A. Kitch, Geotechnical Engineering Principles and Practices, Pearson, 2011. [3] D. P. Coduto, Foundation Design: Principles and Practices, Upper Saddle River: Prentice-Hall, Inc., 2001.