Precast segmented annular structure with structural joint

1. A segment for an annular structure, comprising:

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.

2. The segment of claim 1 , wherein each interlocking portion comprises a first leg and a second leg each partially embedded in the arcuate body and a connecting portion connecting the first leg and the second leg, the connecting portion external to the arcuate body.

3. The segment of claim 1 , wherein each interlocking portion comprises a hairpin bar.

4. The segment of claim 1 , wherein the segment is a precast structure.

5. The segment of claim 4 , wherein the precast structure comprises concrete or cement.

6. The segment of claim 1 , wherein the first plurality of interlocking portions is offset from the second plurality of interlocking portions.

7. 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.

8. The segmented annular structure of claim 7 , wherein the joints further comprise a field closure casting over the overlap of the first plurality of interlocking portions and the second plurality of interlocking portions.

9. The segmented annular structure of claim 8 , wherein the field closure casting comprises concrete or cement.

10. The segmented annular structure of claim 7 , wherein the interlocking portion of the first plurality of interlocking portions and the second plurality of interlocking portions comprises a first leg and a second leg each partially embedded in the arcuate body and a connecting portion connecting the first leg and the second leg, the connecting portion external to the arcuate body.

11. The segmented annular structure of claim 7 , wherein the segmented annular structure is a precast structure.

12. The segmented annular structure of claim 7 , wherein the segmented annular structure is a manhole.

13. The segmented annular structure of claim 7 , wherein each segment comprises a precast structure.

14. The segmented annular structure of claim 7 , wherein the joints are configured to transfer moments and shear forces between adjacent segments.

15. 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.

16. The method of claim 15 , further comprising:

inserting a support member into the overlap between the interlocking portions.

17. The method of claim 16 , wherein the support member comprises rebar.

18. The method of claim 16 , wherein the field closure comprises cement or concrete.

19. The method of claim 16 , wherein casting the field closure comprises casting the field closure from an interior side of the annular structure.

20. The method of claim 16 , further comprising positioning a first segment relative to a second segment to form a section of the annular structure.