饱和度及盐分对海砂动模量和阻尼比的影响OA

This study utilizes a controlled or measurable unsaturated soil vibration triaxial testing instrument to analyze the effect of saturation and salinity on the dynamic properties of sea sand.The findings reveal that the dynamic elastic modulus and damping ratio of sea sand are significantly affected by the degree of saturation:the dynamic elastic modulus decreases and the damping ratio increases as saturation increases.Saturated sea sand has a lower dynamic elastic modulus and a higher damping ratio than unsaturated sea sand.Furthermore,the presence of salt has a significant impact on the dynamic properties of sea sand,with washed sea sand demonstrating reduced dynamic strength,dynamic elastic modulus and damping ratio.These findings are crucial for understanding and predicting the deformation and stability issues in sea sand subgrades subjected to train vibration,providing a scientific basis for subgrade design and maintenance in railway construction.