OK previously I had to cut a small trench (4" wide) in my concrete slab in the kitchen to bury a drain pipe for the sink in the island. The trench was
9' long I cut it with a angle grinder and a demo hammer drill and it was not too bad, I put the 2" PVC drain in and poured concrete over it no problem.Now I have to cut two more slots to accomodate a new 3/4" PVC electrical conduit, one in each slot. The length is about five feet, see the diagram below for my floor plan.
The slab is 4" thick and it continues to the interior courtyard (shown in yellow). The cyan color area is the pool. You will see that there are several planter areas in black. On the left side you should see two thick red lines. I need to run a 3/4" PVC electrical conduit along those lines. Because of the fact the cut especially the one on the upper left is going to come pretty close to the garage on one end and the planter area (no slab there) on the other. I am concerned about cutting a trench there will cause a crack that will never really heal and will become an "expansion joint" of sort.
So my question is, what is the least destructive way to accomodate the 3/4" PVC pipe?
Options:
(1) Cut a slot about 1" wide and 1" deep, put the pipe in, pour concrete to seal off excess space then lay pavers back on top. (2) Cut a 1" slot all the way through the 4" slab, put the pipe below the slab then put back concrete and paver. (3) Excavate the planter area soil down to 3 or 4', then do a mini tunnel with the pipe to try to bridge the 5' length below. Then break a small opening on the other side near the wall, and put in an elbow to the pvc pipe, that way the slab is not being cut at all...however I can see many things that could go wrong.
Thoughts?
MC