| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a buried pipe inside filling method and a trap used for the method for efficiently and safely filling a buried pipe with sediment without sucking residual water or the like by a suction means. Ž<P>SOLUTION: The buried pipe inside filling method includes an exposure step of exposing both ends of the buried pipe, a connection step of connecting one end of the buried pipe to a filling sediment supply pipe 26, connecting the other end to a suction pipe 30 and connecting the other end of the suction pipe to the suction means 80 through the trap for foreign matter in the buried pipe, and a filling step of filling the buried pipe with the filler sediment 60. The trap 40 for foreign matter in the buried pipe includes a water storage tank 46 provided with an intake port 41 and an exhaust port 45 in a top face, and a float valve element 47 provided in the water storage tank and floating to block the exhaust port. The trap 40 can eliminate residual water in the buried pipe so as not to reach the suction means 80. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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