METHOD OF PIPELINE REHABILITATION, MOBILE REPAIR COMPLEX FOR REHABILITATION AND PIPELINE COVERING EQUIPMENT Russian patent published in 2008 - IPC F16L55/16 F16L58/06 

FIELD: construction and refurbishment of pipelines without unearthing them.

SUBSTANCE: in the repair method, the pipeline trench which also work as formwork for the construction of new pipes, after placement of earth backfill, successive layers of loading bearing materials, either smooth or with longitudinal reinforcement and a cover layer are placed. An S-shaped fitting joint, with an elastic shell inside it, is mounted onto the pipe entrance, and an alluvial chamber pipe, with a spatula shell, is fitted onto the fitting. After this, polymer cement concrete "ФОРТ" is injected onto the space between the shells. When placing the loading bearing layers with longitudinal reinforcement, the spatula shell, which is equipped by a profile cuff is used to make lateral furrows on the earth backfill. After the layer sets up, the spatula shell, starting from the smooth edge, is used to place load bearing layer of poly cement "ФОРТ" with a high content of poly-acryl, carbon plastic or metallic fibres in the furrow and these forms longitudinal reinforcement. A rehabilitated pipeline contains a proper repaired pipe, backfill layers of load bearing materials, smooth or with longitudinal reinforcement, placed between layers of soil backfills and protective cover of polymer-cement "ФОРТ". These layers have different composition depending on the intended purpose of the whole system of the new pipe. Apart from this, the solution fall into the mobile repair complex for its repairs and equipment for covering pipelines.

EFFECT: improvement of strength and operational characteristics of covers and the pipe as a whole; betterment of workability process; increment of the extent of the repaired part in one technological cycle.

7 cl, 12 dwg