METHOD FOR REPAIRING TUNNEL MANIFOLDS AND UNDERGROUND PIPELINES Russian patent published in 2017 - IPC F16L55/165 F16L55/163 B29C53/78 

FIELD: construction.

SUBSTANCE: method consists in installing a pipe 18 on a worn-out section 1 and in repair works carried out stage by stage. The pipe 18 of a plastic material is formed by means of winding a profile plastic tape 6 along a spiral. Within the section 1, an anchor frame 2 with anchor racks 3, a transverse anchor rib 4 and longitudinal guides 5 is installed. The tape 6 with a profile connecting device 10 is fed, fixed transversely by the rib 4 and providing rigid connection to form the pipe 18 along the length corresponding to the length of the section 1. The pipe 18 is then divided into section portions 19, each of which is insulated by an intermediate wall 20 obtained by pouring a quick-hardening grout with a thickness of at least 100 mm. An outer crimping ring 21 is installed, and a pouring material is introduced into each portion 19, forming an inner insulating annular bridge 22 ensuring that the joint of the pipe 18 and the section 1 is monolithic, regardless of its shape. The pouring material thickness is limited by the racks 3. The pouring material is prepared directly at workplace while controlling the consistency and density, and then fed by a pump.

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

6 cl, 11 dwg