Abstract:The central conduit is a commonly used temporary diversion facility in trenchless repair construction of pipeline. The pipe segment is used to lay within the pipeline to be repaired by segments, and then its two ends are sealed for interception, which makes the water within the pipeline flow into it, creating a dry environment inside the pipeline and providing the conditions for pipeline repair. However, due to the heavy weight of the central conduit segment, narrow space and complex environment inside the pipeline, the construction of the central conduit is extremely difficult. To solve this problem, a set of new equipment has been designed and used, including transport buoyancy tank and fixed lever hanger. This new equipment successfully solves the construction problems in the transportation and splicing of the central conduit within the pipeline, significantly improving the construction efficiency and bringing the noticeable economic and social benefits.
