ABSTRACT
ABSTRACT: The remoulded red clay retains the beneficial engineering characteristics such as high strength and low compressibility of the original red clay, and eliminates the physical and mechanical properties such as high aquosity and cranny property which are adverse to the high-speed railway engineering. Therefore, the research on the dynamic shear modulus and damping ratio of the remoulded red clay under small strain amplitude can be one of the discriminating standards to decide whether the remoulded red clay can be used as the foundation of the high railway. On the basis of the indoor experimental such as grain analysis, liquid-plastic limit analysis and hit-solid tests, the paper does study on the standard red clay specimens under different confining pressures by using the resonant column test instruments. After sorting out the relevant test data, the paper analyzes the correlation between the dynamic shear modulus, dynamic damping and dynamic shear strain and its law. Then the paper does comparative research on the dynamic property between the remolded red clay and other different kinds of soil, and analyzes their differences and reasons causing the differences. Therefore, the unique dynamic properties are found. The research results can provide basic data and analysis reference for the relevant high-speed railway subgrade.
