While in the tubed wall for covering works of the excavation hole, junction structure null

摘要

PURPOSE:To eliminate the necessity of embedding joint fittings in a connection surface and alleviate a trouble of jointing work by connecting the an intermediate wall and a branch segment to each other with a bolt via a convex part formed on one of the surfaces of the aforesaid wall and segment. CONSTITUTION:A recess part 8 is formed on the edge 7 of an intermediate wall 4 in contact with a branch segment 3. Also, a convex part 10 is formed on the edge 9 of the branch segment 3 opposite to the edge 7 for coupling to the recess part 8. Then, the aforesaid recess part 8 and the convex part 10 are coupled to each other. Through-holes 12 and 13 are formed on the convex part 10 and the periphery 11 of the recess part 8 of the intermediate wall 4 in a direction cross a cylindrical wall body. A long bolt 14 is passed through the holes 12 and 13 and a nut 15 is screwed thereto for tightening the connection of the intermediate wall 4 and the branch segment 3.