ᐅ Sewer pipe: Repair a 20 cm hole

While digging in the garden, I came across a sewer pipe (rainwater). How can I permanently repair it without replacing the pipe?

I would prefer to avoid fully exposing the pipe to swap out the damaged section. Is there a reliable method to make a lasting repair (fiberglass mat + epoxy resin, self-fusing repair tape, etc.)?
See the attached picture.

Thanks in advance!

There should be suitable couplers available (slip coupling and repair coupling, or in this case possibly just a matching piece of pipe since a coupling will be used) that allow you to replace the damaged section without fully exposing the pipe. Any other approach is likely just a temporary fix, and it’s uncertain whether it will remain leak-proof.

Basically, you cut out the damaged pipe section and fabricate a new piece that is slightly shorter so it can be inserted properly. For the resulting gap, you use the slip coupling, which you slide over the pipe coming from above before inserting the new pipe section. You then use this coupling to connect the pipe sections and close the gap.

I would replace the entire section. How much effort could that really be? I would avoid patchwork underground. Otherwise, you might regret it later...

Hello,
the pipe is already exposed, so where is the problem? Remove it and replace it with a slightly shorter one and a slip coupling.
With some effort, you might even be able to fit two standard pipe sections into the gap. Each piece about half the length of the damaged one, with the ends inserted into the existing pipe, so the middle parts form a sort of triangle in the center. If the old pipe section was very long, it could work to join the two new sections in the middle and then push them down.

Best regards,

Andreas

You have all been very helpful to me, thank you very much!