Our soils here are a mixture of silts, sands, loams, some clay, and some peat. Liquifaction is more prevalent in saturated soils that share the same particle size like the sand fills of Seattle. Our soils lock together a bit better and the water table is lowered by all of the utilities.
Almost all soil acts as a sponge in that it can be compressed by a load and when the load is removed it will expand. When the soil is compressed, you are squeezing the air or water out of it. So long as you keep the weight on the soil it will stay compressed and if you remove the weight it will slowly fluff back up. Really, just like a sponge.
How would the building heave? We don't get frost heave here. The entire site will sit under a slab of concrete and storage which is the "load" keeping the sponge compressed.
They've been doing it this way for decades with no issues. We didn't learn much about the preload process in school but it was emphasized during preparation for my license exams.
Now the next cool/weird thing we do is Concrete Treated Base. We lay out several inches of straight cement on top of the mud and then take a monster Caterpillar tiller and till it in to a depth of 14 inches. Then come back with a grader and smooth it out. It sets up like a weak concrete to provide a firm base for site/road pavement.