| 摘要 |
The invention relates to a pipe system 20 comprising four pipes or tubes 21 each with external corrugations 22. The pipes 21 also have an end sleeve or connector joint 23. As in the first embodiment, the pipes of the system 20 are supported in a desired array by an initially separate support 24, comprising in use base element or part 25, an intermediate or middle, in use, cruciform element or part 26 and in use upper element or part 27. The upper part 27 is shown cut away to show the pipes 21 in position. The parts 25 - 27 of the support 24 are bound together by a shrink-wrapped film e.g. of polyethylene, and can be delivered to a building site and laid in a trench without the need to import on the site expensive gravel, sand, soil or the like. Material removed from the trench is used as the back fill. |
