TEMPORARY WATERWAY INSTALLED WITHIN PIPELINE

摘要

PROBLEM TO BE SOLVED: To provide a substantial by temporary waterway installed within a pipeline, enabling easy installation and removal and almost dispensing with maintenance after the installation. SOLUTION: The temporary waterway S is installed between manholes located at both ends of a renewed section when part of an existing pipeline is renewed so as to be taken as a new pipeline having a larger diameter than itself. The temporary waterway S is composed of gutters whose peripheral surfaces are provided with protrusive ribs along a peripheral direction, inverts 2 and 2' installed within the manholes, and trestles 3 whose top surfaces are provided with fixing fittings whereinto the protrusive ribs of the gutters can be fitted. The adjacent gutters are detachably coupled together through the inserting part and receiving part of each gutter within the pipeline and taken as a gutter like waterway. The gutter-like waterway and the inverts 2 and 2' are detachably coupled together through the inserting part and receiving part of each of them. The gutter-like waterway is approximately straightly arranged by means of crosswise position adjusting implements 32 installed in the side surfaces of the trestles 3 and vertical position adjusting implements 33 installed in the under surfaces of them, and the joints of the inverts 2 and 2' and the existing pipeline are detachably coupled together.