I don’t have a stationary base. But if I did, it would have soooo many bear traps and landmines. Walls enveloped by security cameras. Pits, yes. Barbed wire just for the looks of it. Turrets on top of turrets. A battery storage so large it could power a small city for months. On the other hand, I just might hole up/down into a lab or an evac shelter. The basements are almost irresistible. No sunlight there will ever bother your sleep.
I’m now thinking of putting a base next to a lava streak, using the streak as a front entrance trap. A “Welcome” doormat.
Another idea that pops into my mind is to build a wall of shredders and by using blunt weapons and high strength one might be able to send zombies flying into the shredders. Not sure if they’d take damage from the shredders though.
Or how about a long narrow corridor and a “vehicle” that consists mainly of a frame, a shredder, a battery, an engine and a wheel. The idea is to send the tiny vehicle down the corridor when it’s full of zombies. Accelerate to whatever speed and jump out. Could even have several of those lined up and ready.