Experimental study on soil water characteristic curves of unsaturated loess
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Abstract:
Pressure plate extractor is used to study the soil water characteristic curve of unsaturated remolded soil under different dry densities. The results showed that (1) when the sample has smaller dry density, the slope of soil water characteristic curve has higher variation during the low suction segment, the residual water rate is lower, and the moisture holding capacity is worse; ( 2) with the increase of suction, the decreasing range of moisture content becomes smaller with the increase of matrix suction and tends towards stability; ( 3) the power function has good results to fit the obtained data obtained; and ( 4) the soil water characteristic curve results are similar to those tested by VG model. At the same time, penetration tests were carried out for the soil samples under each suction effect using the micro penetrometer, and the relationships between matric suction and bearing capacity of the foundation, liquid index, and compression modulus were obtained.
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