Precast segmented annular structure with structural joint

Abstract

A segment for an annular structure is disclosed. The segment includes an arcuate body extending between a first end and a second end. The segment includes a first plurality of interlocking portions extending from the first end and a second plurality of interlocking portions extending from the second end. Each interlocking portion includes a first leg and a second leg 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. The segment also includes a flange proximal to the first end and the second end of the arcuate body. Each flange includes a first spacing portion that extends radially outward from the outside surface and a second extending portion that extends distally from the main body portion.

1 - 14 . (canceled) 
     
     
         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.   
     
     
         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.