Precast segmented annular structure with structural joint

A segmented annular structure comprising:

• a plurality of segments arranged to form a hollow annular body, each segment comprising
• an arcuate body extending between a first end and a second end, the body having an inside surface and an outside surface;
• a first plurality of interlocking portions extending from the first end of the arcuate body and a second plurality of interlocking portions extending from the second end of the arcuate body;
• and
• a flange proximal to each of the first end and the second end of the arcuate body, each flange including a first spacing portion that extends radially outward from the outside surface and a second extending portion that extends distally from a distal end of the first spacing portion away from the arcuate body;
• and
• wherein joints between adjacent segments of the plurality of segments comprise an overlap of a first plurality of interlocking portions of one of the plurality of segments with a second plurality of interlocking portions of another of the plurality of segments.

A method for forming a joint between adjacent segments in an annular structure such that the joint transfers moments and shear forces between adjacent segments, the method comprising:

• overlapping interlocking portions extending from a free ends of a first segment with interlocking portions extending from a second segment;
• and
• casting a field closure over the overlapping interlocking portions;
• wherein each segment of the adjacent segments in the annular structure comprises:
• an arcuate body extending between a first end and a second end, the arcuate body having an inside surface and an outside surface;
• a first plurality of interlocking portions extending from the first end of the arcuate body and a second plurality of interlocking portions extending from the second end of the arcuate body, and
• a flange proximal to each of the first end and the second end of the arcuate body, each flange including a first spacing portion that extends radially outward from the outside surface and a second extending portion that extends distally from a distal end of the first spacing portion away from the arcuate body.