Abstract: Placement of foraminous dual piping in non-cohesive subsoil, and use in beach stabilization or use in fluidization as navigation channel maintenance. Air, water, or mixed fluid medium is jetted from the foraminous piping downward onto and into such subsoil so as to fluidize it, while the piping is pressed downward, as by earth anchors, into the fluidized subsoil until it is below the level of adjacent subsoil located apart from the fluidization vicinity. A zigzag arrangement of flanking earth anchors as viewed from above and interconnected by tie bars from earth anchor to adjacent earth anchor in the pattern.