Form-fill concrete wall

A form-fill wall structure for forming a sheathed concrete wall comprising:

• first and second substantially parallel wall panels spaced a predefined distance from one another, the panels being fabricated of a water impervious material;
• interconnection means on each wall panel adapted to engage interconnecting cross webs;
• a plurality of interconnecting, metallic cross webs having ends, the ends being engaged with the interconnection means on each wall panel to maintain the wall panels in a spaced, interconnected relationship;
• and,
• end containing means for forming a form structure adapted to receive a concrete slurry, wherein the wall panels and cross webs are part of a unitary wall when the form structure is filled with concrete, wherein the wall panels have elongated corrugations and when first and second wall panels are positioned in a spaced, parallel arrangement to form the form structure, the corrugations being vertically oriented with a series of alternating flat segments and V-shaped segments, the V-shaped segments of opposed panels being inwardly directed forming a series of vertical constrictions in the form structure wherein the V-shaped segments each have an apex and the interconnection means on the wall panel is at each apex, wherein the cross webs engage the interconnection means and interconnect the spaced panels at the constrictions in the forms structure, the corrugations and cross webs forming a series of substantially octagonal wall segments.