The Triaxial Test is a laboratory procedure used to determine the mechanical properties of soil. It involves placing a cylindrical soil sample in a chamber where it is subjected to controlled pressure from all sides, simulating conditions found underground. The test measures how the soil behaves under different stress levels, providing valuable data for engineering projects. During the test, the soil sample is also subjected to axial loading, which helps assess its strength and deformation characteristics. The results are crucial for understanding soil stability and are often used in the design of foundations, retaining walls, and other structures in civil engineering.