Three-Dimensional finite-element and constitutive modeling emerged as the dominant framework for analyzing foundations, settlements, and pile–soil interactions across buildings, embankments, and dams. Mindlin elastic theory was integrated with 3-D analyses to capture complex stress states and soil-structure coupling under static and dynamic loads. Field tests on permafrost behavior, creep, and anchor performance, together with advanced cementitious material modeling, linked laboratory insights with real-world design practice.