Slab drain pipe issues!! HELP!

Hello from a new member. I have been reading alot of info here and now have ny question/problem/ordeal I need asssitance and advice with.

My house was purchased 4 years ago,and it was built in 1971. The inspector didnt do a very good job it appears because we have had plumbing issues and electrical off and on since the purchase.

The most recent issue was a blockage of some sort in the drain pipe in the floor of the house which is a slab concrete foundation. The beginning of the drain starts in the kitchen in the farthest corner of the house,and the drain moves diagonally across the kitchen floor,where it then ties into the washer drain (RED Y on the diagram). I have had a camera go through the pipe and seen two issues that are circled on the diagram. The first issue is the first blue circle which the camera showed to fall down into a section of the pipe like the floor was bad for just a few inches,then the camera popped back up Unless that was a grease trap?.....Traveling down the line the Y part of the drain is where the washer drain ties in and there is a collaped pipe section right on the union it appears. The broken pipe even though obstructed dont seem to actually hurt flow with just water but could see if the garbage disposal could send junk down and actually block the flow.

The problem arose when we had blockage in the pipe and causes water to over fill into the sinks and out the drain pipe which caused water damage to a few walls and cabinets. Insurance gave us money for damages,but after depreciation,and deductables we barley have enough to get the main work done without digging into our personal account but it appears the job is way more thna insurance expected/quoted.

My actual questions are these.
1) do I have to cut the concrete to access the broken/damaged pipe below th slab?
2) are there options other than breaking up the floor or digging under the house??
Is there a way to fix the pipe with as little damage to the floor as possible that isnt a VERY expensive job to do ?

if you could provide any assistance or need personal contact info from me I could explain a little better.

Here is my reason,I already have emptied the kitchen totally to bare studs,fixed all the other little things and water damage,and moved around the layout a little to make a larger kitchen. So Now I have drywall all up,new cabinents and new laundry room layout and cabinets in there too. So now its time to dig the the concrete up or figure another option to repair the pipes inthe slab,before I can go any further.

Below is a rough diagram of the layout. Red is the drain,and can see the blue circled areas where the collapsed floor is and the actual breakage.

Thanks for any help you may provide.
Brian

Also the tile floor isnt laid down yet,so we are still on a bare concrete floor. And the kitchen sink hasnt been opertional for 4 months,as neither has the kitchen itself,so this has been a timely repair. I am to the stage I need the pipes fixed so I can continue on finishing this large project and make the wife happy to get her kitchen back.The only items running on that end of the house is the washer drain,and then both bathrooms and toilets. Nothing is going down the drain from the sink area at all only the washer dumping its waste down towards the broken area at the Y.

question , Are You still married?

Dig up the floor. Shot cuts got you here. Stop using the disposal until the drain is fixed. Looks like 1 days work 2 men

Yes,I am still married and will continue to be,as she is OK with this project even though it has been hectic.The kitchen was showing its age anyway,and with the water damage,and drain issue,we were able to double the size of the old kitchen while also updating the cabinets which are new not repaired (lots of particle wood was in there)

I stopped using the disposal and one wont go back in once done so I am hoping that alone will help in the future. We most likely wont add a diposal to the new sink this time around just to help not have blockage anymore.

I have been told that pipes are laid on the foundation and then gravel or footing placed on top of that before the actual concrete is poured,so that tells me the pipes are actually bedded below the concrete and not surrounded by concrete correct? I am confident that once the openings are made,and the pipes exposed the repair will be fairly easy once access to them is made. The only thing that has help this repair off is naturally the mess from the concrete saws. I guess I would like a guesstimate on how thick the concrete standard was in 1971 for th slab so I can expect how thick I am goign to have to cut for access.

The camera only showed the two bad spots that were causing the issues,and marked them on the floor so I have everything at my disposal to carry on with the project,was just leary that after I was done I would hear or read about some other time saving new product to do the repair with out destroying the flooring.

The only short cuts I have made is to do most the work myself,which I am very proud of by saving as much money as possible,being that the insurance company didnt calculate correctly the amount of damage and the amount of money for the repaiir. For instance they priced repairing the cabinets which were original 1971 cabinets,and also gave a 600.00 dollar allowance per bad spot in plumbing in the floor,so there is 1200.00 in that alone we were given before depreciation and deductibles were taken.

Thanks for your reply.

the slab is probably a minimum of 4" and could be quite a bit more; especially as you get towards the edges near the footers.