If you are working with a concrete block foundation wall rather than solid concrete you may be able to use a carbide tipped core bit on a hammer drill to cut through the block walls.
How to cut through poured concrete wall.
That s a hydraulic hand saw probably cutting 10 deep by making 5 passes of 2 ea pro s use a diamond ring saw 14 20 24 hand saws track mounted wall saws 16 horizontal ft suggests wall saw hand saw for the vert cut s figure 4 5 per inch foot in atl.
Line up the blade of a concrete saw over the marks on one side of the wall.
A circular saw is used to make entry through a cinder block wall into the future waiting room of a hospital.
A circular saw with a masonry blade can also be used to either score or completely cut through the block.
If your cut doesn t need to be exact use a cold chisel and hand sledge to cut the concrete.
This is the first cut through the wall.
Get a friend to hold one end while you hold the other and run the line over the region to be cut.
When you re cutting concrete that is already poured and finished use a chalk line to mark the region.
Once both sides ware cut he used a sledge hammer and some wedges to knock the wall out of position and into the pre dug hole awaiting outside.
Don t force a blade into a cut.
Score the length of the cut three or four times with the chisel.
Designate the area of finished concrete to be cut using chalk lines.
6 move to the other side of the.
This process took approximately one hour to complete.
Start at the top of the opening and cut carefully along the lines you made on the wall.
My plan here was to bury the knocked out concrete wall slab under the future concrete floor.