METHOD FOR RESTORING A PIPELINE AND A PIPELINE

摘要

The invention relates to the field of constructing and restoring a pipeline without ripping thereof and could be used in restoring thereof by deposing an inner coating in constructing and restoring a pipeline by the ditch-free technique. The technical result in the invention consists in enhancing strength and operational characteristics of the applied coating and overall pipe construction, increasing the technological effectiveness of the process, ensuring a possibility for enlarging a length of the section being repaired in a single technological cycle. The method for restoring a pipeline including, after the step of applying the undercoat plugging layer, a step of applying successively layers in the passageway of the restored pipeline serving simultaneously as a formwork when making a new pipe, which layers carry functions of a heavy-loaded layer being smooth or having longitudinally placed stiffening ribs and a protective operational layer, for which purpose the method including steps of: mounting a S-shaped technological pipe branch at the input of the pipeline, inserting an elastic tool thereinto, providing the pipeline with an spreading chamber, inserting into that chamber an applicator tool, and mounting that chamber onto the pipeline branch, whereupon pumping between the tools as the concrete composition a FORT group polymer-cement composition, wherein, during the step of applying the heavy-loaded layer having longitudinally placed stiffening ribs using the applicator tool provided with the profiled collar, performing a step of making longitudinal technological valleys in the body of the undercoat plugging layer being applied, and, upon setting this layer, performing a step of applying by the applicator tool having the smooth application edge the heavy-loaded layer from the FORT group polymer-cement composition rich of polyacrylic, carbon composite or metal fiber, which heavy-loaded layer fills the technological valleys thus forming the longitudinal stiffening ribs. The restored pipeline comprises the restored pipeline itself and layers that carry functions of an undercoat plugging layer, a heavy-loaded layer being smooth or having longitudinally placed stiffening ribs disposed between the undercoat plugging layer and heavy-loaded layer, and a protective operational layer from a FORT group polymer-cement composition having a various content depending on the layer designation, thus forming a single system construction of the new pipe.