WATERWAY CONSTRUCTION MEMBER

PROBLEM TO BE SOLVED: To provide a waterway construction member which is easy to set and adjust their grades, and can reduce the volume of required packings. SOLUTION: The waterway construction member 1 comprises an upward opening gutter-like invert member 2, where dirty water etc. flow, used for constructing a new water way within a duct P buried underground, and is provided with a plurality of elastic legs 10 as supports of which the lower ends contact with the inner surface of the duct. Each leg 10 consists of an inner circumferential central shaft 12 and an outer circumferential fixed pipe 11. A hexagonal hole 13 is formed on the top end face of each central shaft, and the vertical position of the waterway construction member is adjustable by inserting a hexagonal rod spanner S into the hole 13 and rotating the central axis. Each leg 10 is set at a position so that its hexagonal hole 13 can be exposed upward and can adjust the vertical position of waterway construction member 1 by rotating its central axis from above. COPYRIGHT: (C)2006,JPO&NCIPI