surrounding sand soil graded as desired the tiered arrangement of cell modules of the present invention of which fig9 11 represent examples create a sand and or soil internal reinforcement system that increases the effective tensile strength of the sand soil and that can be formed without the need for heavy moving equipment the system has the capacity to be penetrable by sand soil and water and enables the release of hydrostatic pressure the cell modules may be configured and arranged such that at no point within the vertical rise of the multi tiered reinforcement system does the hydrostatic pressure exceed one pound per square inch regardless of the number of tiers the horizontal tiers may be extended selectively to widen the overall footprint of the system so that the energy of plunging type waves is uniformly absorbed by the mass of sand soil where the system is located it is to be noted that the reinforcement system also forms horizontal terraces which after exposure by wave or wind action may remain uncovered and is thereby suitable to establish separate planter boxes for native coastal vegetation further the arrangement of the multi tiered reinforcement system upon exposure after aggressive wave action can be traversed by pedestrians without difficulty more generally and as earlier noted the present invention is advantageous in that the modules may be arranged at angles with respect to one another such that curved and other complex.