Considering effective action area of matric suction on granular media, the concepts of equivalent matric suction and generalized soil—water characteristic curve were presented.

The methods of calculating the effective wetting front suction were summarized in this paper.

Experimental study on influence of matrix suction to unsaturated soil strength of Huanghe river dike;

Influence of density on matrix suction of sandy soil;

For loess sample in certain water content,the change of matrix suction resulting from variation of soil temperature is less in bigger water content,and is more in lower water content.

Influence of matric suction on shear strength behavior of unsaturated soils;

Stability analysis of soil slope considering matric suction;

One-dimensional constitutive model of unsaturated soil considering change of matric suction;

After the infiltration of precipitation,it will make the slippery band soil hydrate,turn into clay,and cause the suction of the bas.

In this article, the experiential mathematical model expressing the relation between the suction (ψ) and the volumetric water content (θ) is established,based on the experiential parameters in the soil engineering technique of the tailings sediment.

The displacement of slope due to rainfall is related to suction and the stress-strain behavior of unsaturated material.