Mold panel unit and spring-water processing structure using mold panel units

A spring-water processing structure formed on a slab, comprising a plurality of mold panel units and a cement filler after-cast on said mold panel units, each of the mold panel units comprising:

• a mold panel having one and other sides and made of one of a synthetic resinous material and a fiber-reinforced plastic material;
• a plurality of projections each of identical shape, said projections being formed on the one side of said mold panel, said projections being arranged longitudinally and laterally of said mold panel in equidistantly spaced relation to one another;
• a plurality of recesses formed in the other side of said mold panel in corresponding relation to the respective projections;
• a plurality of projecting ridges formed continuously in a criss-crossing manner, respectively, between rows and columns of said projections to define a plurality of checkers each having four sides, said projecting ridges projecting on the same side as said projections, each of said projections being located within a corresponding one of said checkers formed by said projecting ridges;
• and
• a plurality of cross-projecting ridges each extending from and intersected by a respective side of said checkers and projecting on the same one side as are said projections,
• said mold panel units being laid on the slab such that end faces of the respective projections of each of said mold panel units are in abutment with an upper surface of the slab, said recesses of the mold panel unit opening upwardly.