Journal of Engineering Research

As an important component in geotechnical engineering, unsaturated soils exhibit complex mechanical properties. Their unique behaviors in terms of moisture, stress, and deformation directly affect the stability and safety of engineering projects. This study conducts an in-depth analysis of the mechanical properties of unsaturated soils, exploring their performance and applications in different engineering environments, particularly in foundation engineering, slope stability, and underground engineering. Several theoretical models and experimental methods are proposed in this paper, aiming to provide guidance and references for the design and construction involving unsaturated soils in geotechnical engineering. Through research on key mechanical parameters such as soil-water characteristic curves and soil elastic modulus, the mechanical performance of unsaturated soils under different environmental conditions is clarified. Combined with engineering practice, the application prospects and challenges of the mechanical properties of unsaturated soils in modern geotechnical engineering are put forward.

Unsaturated soil; Mechanical property; Geotechnical engineering; Application; Soil-water characteristic curve