Mystery cable installation process - GIF

[Jon]

Mystery cable installation process. Anyone know what's going on here? Found this on TikTok here.




Previously:

Internal pipe coating tool - GIF
Laying miles of pipe in a ditch at once - GIF
Friction welding drill pipe for oil exploration
Trenchless V-plow pipe layer
One-man concrete pipe unloading onto tires - GIF
Pipe stretcher - photo
Deep ocean pipe laying machine - video

[DIYSwede]

Long shot: -Re-lining a leaking sewage/ drain tunnel?
Seems like the flat ribbon feeds through and around the perimeter and (perhaps get heat-welded or just)
zip-locked to the previous turn, making a tight liner, albeit with a smaller section than the tunnel itself...

[clavius]

Long shot: -Re-lining a leaking sewage/ drain tunnel?
Seems like the flat ribbon feeds through and around the perimeter and (perhaps get heat-welded or just)
zip-locked to the previous turn, making a tight liner, albeit with a smaller section than the tunnel itself...

That would be my guess as well. One of the comments mentioned a product called "SRP" and some judicious googling got me to this, that is perhaps the same thing or very similar:


https://www.conteches.com/pipe/steel...rpe-pipe/sprpe

[DIYSwede]

Thanks, Clavius! Excellent link. -So that's why the tube's dia is less than the surrounding concrete culvert,
to have grout pressure injected between it and the liner (then itself probably filled to resist the grout's pressure).