| 摘要 |
<p>PURPOSE:To easily destroy a spiral pipe in spiral form by only pulling a core wire, by embedding the core wire into an engagement rib, in the disassembly method for a spiral pipe having a joint part in which an engagement rib and a socket for receiving the engagement rib are engaged. CONSTITUTION:A spiral pipe has an engagement rib 3 in the longitudinal direction on one edge part of a basic part 2, and a strip-shaped body 1 having a socket 4 for receiving the engagement rib 3 is wound in spiral form on the other edge part, and a connection part 32 in which the engagement rib 3 and the socket 4 are engaged each other is formed. Further, a core wire 5 is embedded into the engaging rib 3 of the spiral pipe, or into the wall in the vicinity of the engagement rib 3 or into the socket 4 or into the wall in the vicinity of the socket 4. The connection part 32 is destroyed in spiral form by pulling out the core wire 5. Therefore, the spiral pipe as the inner mold frame for a concrete structure can be demounted easily after the concrete curing.</p> |
