Lecture
This lecture covers the concepts of drained and undrained conditions in soil mechanics, focusing on the effects of loading on water pressure and volume changes. It explains the differences between short-term undrained conditions, where pore pressures develop, and long-term drained conditions, where water can escape. The lecture also delves into laboratory tests such as triaxial tests, highlighting the importance of understanding soil behavior under different loading conditions. It discusses the significance of effective stress, consolidation, and the use of different criteria for drained and undrained scenarios, emphasizing the role of pore pressure and soil permeability. Additionally, it explores the concept of overconsolidation ratio and its implications on soil behavior.