| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a buried curved pipe structure whereby displacement of the ground from a belly part side of a curved pipe can be absorbed. SOLUTION: A curved pipe 10 is connected by welding between pipe main bodies 3a, 3b. The curved pipe 10 is formed in a structure making its thickness with a belly part side 10a in a degree equal to thickness of the pipe main body 3a, 3b and a back part side 10b larger than the belly part side 10a. Forming the back part side 10b larger than the belly part side 10a is for a reason that in the case of receiving displacement of the ground to the belly part side 10a by an earthquake or the like, and before buckling is generated in the back part side 10b, plastic deformation is generated in the belly part side 10a. In this way, a critical bending angle of the curved pipe is increased, the displacement of the ground can be absorbed.</p> |
