Installing a Bench in Garden
Depends on the type of anchor.  Some cement anchors are similar to your average screw, except the threads are wider.  Other cement anchors are similar to a toggle screw, and can be much larger.  What follows is how to fasten a concrete anchor that is similar to a screw.

You will need to drill a pilot hole with a concrete drill bit. The packaging will likely say what size bit you need, but a rule of thumb is for the pilot hole to be narrower than the threads of the screw (in this case, the anchor) so they can grip the surrounding material firmly.  A hammer drill will work well for your pilot hole, though I managed with the 18v dewalt drill/driver for 1/4" anchors.  Then you drive your anchor using a drill.  It helps to drill the pilot a bit deeper than the length of the anchor.  This will ensure the anchor will drive cleanly.

Not sure about your "Mound of cement" statement.