| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a construction method of a drainpipe to be buried in foundation, capable of easily mounting an inner pipe in a sleeve pipe. <P>SOLUTION: A drainpipe 2 to be buried in foundation comprises a sleeve pipe 10 and an inner pipe 20, of which body parts 11 and 21 have approximately the same bending radii S10 and S11, respectively. In a state that the inner pipe 20 is mounted in the sleeve pipe 10 buried in a foundation 1 of a building in a penetration state, a pipe axis L1 of the sleeve pipe 10 and a pipe axis L2 of the inner pipe 20, or a pipe axis of the circular arcuate body part 11 and a pipe axis of the circular body part 21, approximately coincide to each other. In order to insert the inner pipe 20 into the sleeve pipe 10 buried in foundation 1 of a building, after a downstream pipe end 20A of the inner pipe 20 is inserted into an upstream pipe end 10B of the sleeve pipe 10, the inner pipe 20 is rotated around an axis in the insertion direction of the inner pipe 20, so as to reach a position where the pipe axis L1 of the body part 11 of the sleeve pipe 10 and the pipe axis L2 of the body part 21 of the inner pipe 20 approximately coincide to each other through the insertion into the sleeve pipe 10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
