Patent ID: 7837174

Claim:
A liquid-tight formwork wall for use in a formwork assembly for forming a concrete structure, said formwork wall comprising: at least two panels each defining a front face, a rear face and a peripheral edging extending between said front face and said rear face, each one of said panels having at least one first dovetail joint means made continuously and coextensively on said peripheral edging; a panel connector having at least two second dovetail joint means coplanar with said first dovetail joint means, each said second dovetail joint means being complementary to said first dovetail joint means of a corresponding one of said panels; wherein each said second dovetail joint means is interlocked with said first dovetail joint means of a corresponding one of said panels to form a dovetail joint therewith, in order for said connector to hold said panels in an edgewisely juxtaposed coplanar fashion to form said formwork wall, and wherein said panel connector extends generally within the plane of said at least two panels; a securing member for securing said connector and said panels with one another; and at least one support member attached to said formwork wall, for supporting an armature grid adjacently to said formwork wall, wherein said at least one support member defines opposite first and second ends, and is attached at said first end to a first one of said formwork wall, and is further attached at said second end to a second one of said formwork wall, said support member maintaining said first and second formwork walls spaced apart from each other.