The index for evaluating the compressibility of foundation soil is

The indexes for evaluating the compressibility of foundation soil are compression index Cc, consolidation index Cs, compression modulus E50, compression coefficient Cr and compression strength. These indexes can reflect the properties of soil such as compressibility, consolidation, compressive stiffness and compressibility, and are important indexes to evaluate the engineering performance of soil.

The indexes for evaluating the compressibility of foundation soil include:

Compressibility index Cc: Compressibility index refers to the compressibility of soil under specified consolidation stress and reflects the compressibility of soil. The greater the Cc, the stronger the compressibility of the soil.

Consolidation index Cs: Consolidation index refers to the volume deformation performance of soil under specified consolidation stress, which reflects the consolidation property of soil. The larger Cs is, the stronger the consolidation performance of soil is.

Compressive modulus E50: Compressive modulus refers to the stress-strain relationship of soil under 50% maximum stress difference, and is an index of compressive stiffness of soil. The greater the E50, the greater the compressive stiffness of the soil.

Compressibility coefficient Cr: Compressibility coefficient refers to the compressibility of soil under specified consolidation stress and reflects the compressibility of soil. The greater the Cr, the stronger the compressibility of soil.

Compressive strength: compressive strength refers to the maximum compressive strength of soil under specified stress and is an index of soil compressive strength. The greater the compressive strength, the stronger the compressive capacity of soil.