Waterproofing the wall around a crack

I wonder if this would work. As I mentioned in my other thread in this forum I suspect that I have a crack in one of my basement walls. This is just below an above the grade window on the same wall (for the layout see my other thread) While I am waiting for my USB borescope to arrive so I can assess the damage behind the wall of the finished basement I am evaluating my options to fix the problem on that wall. I don't want to dig the entire wall and to water proof is since it seem to be ok for the rest of it. (the problem comes from the wall that forms a corner with this one where the crack is) So I am thinking about digging all the way down to the footing but just around the crack and under the window. Next I will fix the crack using one of the recommended concrete or expoxy or whatever. After that I will apply whatever asphalt solution and membrane that is recommended and after that I am planning to backfill with the previously excavated soil. No draining at the base As someone pointed here by doing the above I am going to create a sort of gap there where the soil will be softer that the surrounding soil and the water could migrate toward this spot due to some lateral pressure (I forgot the exact term) In order to avoid this migration I am thinking of adding two plastic membranes positioned like in this picture (only closer to the exterior edge of the dig)