Shear Wave Velocity as a Measure of the Dynamic Properties of Confined Silty Soil

Abstract This study was conducted to assess how various confinement levels impacted the dynamic and mechanical characteristics of silt layers in different locations. Results showed a direct correlation between the level of confinement and the natural frequency of vibration in the silt layers. More specifically, confinement ranged from 11 to 225 kPa, with changes observed in resonance frequency, shear velocity, and maximum shear modulus (Gmax). For instance, as confinement increased, so did the shear velocity, which strengthened the forces connecting soil particles and improved stiffness. Additionally, the maximum shear modulus increased, showcasing the development of stronger inter-particle connections and a denser soil structure. These findings demonstrated the considerable impact of confining pressure on various aspects of geotechnical engineering. A deeper comprehension of the consequences of long-term confinement, including liquefaction and structural design, will be vital for successful engineering projects. Furthermore, the soil categorization based on shear wave velocities established in this study will help in decision-making regarding geotechnical engineering. Finally, this research established the relation between confinement and resistance to shear stresses, showing the importance of proper ground improvement techniques to reduce confinement pressure.