Do you have heavy clay soil? Are these on every side of your home? They may be part of your home's stabilizing level system. They're meant to keep your soil from causing heave damage when it alternates between too dry and too wet. We have something like this in our house because of the heavy clay.
A few years ago we put up a fence around our back property and in May of '15 we had only three days of dry ( or non-rainy) weather. I had to dig up and reset more than a few posts because they began to wildly tilt because of the thick slurry that the soil turned into...... I'd leave it be or maybe even have it checked to make sure everything is working.
By the way
