Experimental Research on Filtration Effect of Mesh Filters in Dewatering of Silt Foundation

The filtration effect of four different filter structures is studied. These four designed filters are used in three different dry densities silt sand. The four filters are: 1) without filter; 2) 80 mesh single-layer filter structure; 3) 120 mesh single-layer filter structure; 4) one 80 mesh and one layer of 120 mesh filter combination structure. The result shows that the permeability coefficient of the soil is affected by the mesh size. The smaller the pore size, the lower permeability in the soil. The effect of filter depends on the aperture. The aperture of the filter influences the quality of sand adhere to the filter, and affects the silt erosion. The result of the experiment provides a suggestion for the selection of the mesh filters in the precipitation of the two-dimensional foundation.