That's an excellent and practical question. As someone who's dealt with this in community projects, the "best" method balances security, durability, and minimal damage to the sidewalk. The most reliable and professional solution is using concrete expansion anchors or sleeve anchors.
Here’s a natural, step-by-step approach:
First, you'll need the right materials: a heavy-duty trash bin with a flange or anchor points at its base, concrete sleeve anchors (stainless steel is best for weather resistance), a hammer drill, a masonry drill bit, a wrench, and a marker.
Start by positioning the bin exactly where you want it. Through the bin's base holes, mark the drilling spots onto the concrete. Move the bin aside. Now, put on your safety glasses. Using the hammer drill and a masonry bit matched to your anchor's diameter, drill straight down into the concrete at your marks. The hole depth should slightly exceed the anchor's length—blow out the dust.
Next, insert the sleeve anchors into the holes. Place the bin back, aligning the holes over the anchors. Hand-tighten the washer and nut onto each anchor. Finally, use the wrench to firmly tighten each nut. The anchor expands inside the concrete, creating a incredibly strong, permanent mechanical lock.
Why is this the best way? It creates a formidable anti-theft and anti-vandalism hold. The bin becomes part of the sidewalk, unable to be tipped over easily or carried away. It also allows for removal if absolutely necessary by unbolting, though the anchors remain in the concrete.
A quick pro tip: For a slightly less permanent but still secure option, consider using a heavy-duty epoxy adhesive to glue anchor studs to the concrete, then bolting the bin down. It's very strong but can be ground off later if needed. Whichever method you choose, securing bins makes our urban spaces cleaner and more orderly for everyone.