The behavior of unsaturated soils significantly influences the stability of geotechnical engineering structures. Unsaturated soils, often known as partly saturated or compacted soils, are soils in which the voids contain both air and water. Unsaturated soils have negative pore water pressure due to the attraction of water molecules to soil particles. Suction affects the soil's strength and volume-change behavior. Moisture content, which represents the amount of water present in the soil, also plays a vital role in determining soil properties. The shear strength of unsaturated soils differs from that of saturated soils due to the presence of suction. Unsaturated ground can withstand volumetric alterations in response to modifications in humidity content or stress conditions. These volume changes can lead to soil collapse, settlement, or heave, affecting the stability of engineered structures. Proper characterization of volume change behavior is essential for designing foundations and assessing the long-term performance of geotechnical systems. Overall, this topic highlights the significance of considering unsaturated soil mechanics for planning and analyzing geotechnical engineering structures to ensure their safe and reliable performance. Trích dẫn: Le, T.B.T. (2024). Study on Unsaturated Soils’s Influence on Stability of Geotechnical Engineering. Tạp chí Khoa học và Công nghệ Trường Đại học Xây dựng Miền Tây, số 9, tr. 5-16.