| 摘要 |
PROBLEM TO BE SOLVED: To provide a tubular buried object in which earthquake resistance and water-tightness of a tubular buried object which has been buried already or is to be buried can be improved, and a manufacturing method thereof.SOLUTION: In a tubular buried object (1), a fragile part (3) is formed to induce cracking in a joint part (J) or on a wall surface between tubular buried objects (1) which are provided successively forward and backward. The tubular buried object (1) comprises a pair of recessed grooves (4) which are recessed on the wall surface of the tubular buried object (1) and at positions on both sides with the joint part (J) or the fragile part (3) interposed therebetween, a sheet member (6) which is disposed between one recessed groove (4a) and another recessed groove (4b) and covers the joint part (J) or the fragile part (3), and a fixing member (8) which is held internally between the recessed grooves (4) together with the sheet member (6) and holds and fixes the sheet member (6). |
