Loess subgrade strength law

The saturability and infiltration coefficient caused by infiltration water were analyzed by indoor experiments, and the variation law of its shear strength in accompany with compaction degree and water content was studied. The experiment results indicate that compacted fill still has collapsibility, water content influences the basic properties of compacted loess fill seriously, such as saturability, permeability coefficient and compressibility, etc. When water content increases, its saturability and compressibility remarkably decrease, but the permeability coefficient has a crest value near the optimum water content, and its shear strength and water content have non-linear relationship, it and compaction degree have linear growth relationship. The research results show that strict controlling water content of compacted fill and enhancing the compacted degree standard of loess subgrade can enhance loess subgrade massive character.