METHOD FOR TRENCHLESS RECONSTRUCTION OF INTERNAL SURFACE OF CULVERT SYSTEM Russian patent published in 2017 - IPC F16L55/165 F16L55/163 B29C53/78 

FIELD: construction.

SUBSTANCE: for the method implementation, the reinforcement frame in the form of a nonequilateral profile 2 is fixed on the inner side of the reconstructed section 1. The vertical ledges 3 of the profile 2 have transverse openings 4. The initial spiral turn of the belt 7 is aligned with the profile 2 so that its ledges 3 are mated to the base 8 of the belt 7 and have a pitch sufficient to accommodate at least two elements 9 of the belt 7. The openings 4 in the profile 2 are arranged coaxially with the transverse openings 11 on the vertical ledges 10 of the elements 9 of the belt 7 for fixing them by the rod elements 13. The second and subsequent spiral turns are wound. The turns are connected by a profile connecting device 14 equipped with the membrane compensator 15 and the composite base 16. The device 14 is also equipped with primary 20 and secondary 21 locking elements, which are able to interact with the elements 12 of the belt 7. The winding of the belt 7 and the device 14 is carried out by winding machines, with permanent fixation by the elements 13, until the plastic pipe 22 is obtained along the entire length of the section 1. The volume between the inner surface of the section 1 and the outer surface of the pipe 22 is filled with a polymer-cement composition.

EFFECT: increasing the strength of connecting the winding elements together and fixing them to the culvert system.

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