How to Repair a Broken Sewer Pipe under a Concrete Slab?

call a plumber, this takes expertise and you could make it worse by doing it yourself.

A broken sewage pipe can create massive headaches for any When a pipe breaks,

You need to call a registered and qualified Plumber or you could do more damage.

a new sleeve inside or surrounding the existing pipe,concrete is broken with a jack hammer, then soil dug out muck cleaned, drained of water,done from one exposed end only,,excavate the entire trench,and lay new pipe,

A common method these days inserts a liner inside the existing pipe to repair breaks. This can be done with access to the pipe at one side of the concrete without access to the entire line.

two choices ... break through the concrete slab or abandon the pipe and install a replacement that doesn't go under the slab. [btw, what is over this 'slab'?]

Make a hole through the slab.

usually the easiest thing is to simply run a new pipe line. Maybe it can be above the slab at least until you are near the edge.

There are several ways to do this.

https://www.rotorooter.com/blog/4-types-of-sewer-l...

There are contractors that do that. I don't know how. They don't tear up concrete.