Shift work occurs in a work schedule that utilizes 24 hours a day and occasionally, 7 days a week, to keep an organization operating. Shift work occurs whenever 24-hour coverage is necessary or when a 24 hour day optimizes work output and productivity.
You want to cut at a 45-degree angle so that the PVC ends in a sharp point. The rest is just a matter of cementing the PVC to the adapter and attaching it to your hose. Trench, Then Tunnel. The first step in tunneling under a sidewalk is to dig a trench perpendicular to the sidewalk. You want it to be deep enough to let you tunnel several inches below the bottom of the sidewalk and as long as the PVC pipe you attached to the hose.
1. Measure the distance between the tilted end of the unlevel concrete slab on the sidewalk and the ends of the two adjacent concrete slabs. If the slab tilts 3 inches or more above or below the two adjacent concrete slabs, you need a 4-by-4 board that is 2 feet long to hold it up as the new concrete sets.. Pry up each corner of the concrete slab with the pry bar and two-by-four. This may take a few rotations of prying up each of the corners before the concrete slab loosens enough for your to lift 1 inch or more out of its seat in the ground.