[austin]

This is a basement 2-car garage at grade level. The other 3 sides of the house are back filled with sand to about 2/3 the height of the cinder block foundation. Winter temperatures here go to -20 to -30. The concrete floor is cracked in several areas, especially near the garage doors door. When I purchased the house, the gravel driveway sloped toward the garage. I regraded it a couple of years ago to slope away from the house. I want to repair the cracks, so I began by digging out the area in front of the garage door. Please see the uploaded photos. There were 2" x 1' rigid polystyrene foam lying vertically against the front of the slab and horizontally in front of and below the bottom edge of the slab. The edges/joints of the foam wasn't sealed, so water could get in behind it. There doesn't appear to be a French drain, unless it's under the foam, but that wouldn't seem to make sense to me. I haven't finished digging it all out yet, but it looks like I'm going to find a similar picture all along the front of the garage. What do I do about all this?! It will have to be a quick DIY fix because it will soon be winter here. We're look at a few days now of above freezing temperatures, so I hoping I'll be able to get it done now.