Segment Measurement and Verification of Permeability Coefficient of Reconstituted Unsaturated Loess

The unsaturated soil permeability decreases with the moisture content change, but the relations between them is difficult to determine. According to the previous research, the permeability coefficient of unsaturated heavy loess of large and medium pore drainage section and micro pore drainage section are researched by direct and indirect method. The results show that the permeability coefficient of unsaturated soil can be determined by indirect method and direct method measurement.