NASA's fact sheet mentions relevant weights, and that each corner of the crawler has a two-belt truck, but it omits the footprint of the 8 belts.
From differing sources, the shoes are either 7.5 feet x 1.5 feet (2.286 meters x 0.4572 meters) or 0.3 meters x 2.3 meters (7.54593 feet x 0.984252 feet), for an area between 1620 in2 and 1070 in2 which is a bit of a range, but workable.
Given a 500,000 lb load test, that gives an upper bound to the between 308 PSI and 467 PSI, but that's the design per-shoe and not the capacity or weight of the system.
According to this page, the crawler itself weighs "Approximately 6.6 million pounds", with a maximum load of 18 million pounds, while this sheet lists the Artemis I launch vehicle at "Approximately 3.5 million pounds" and ML-1 (Mobile Launcher-1) as "Approximately 11.3 million pounds". That gives us a total weight of 21.4 million pounds for Artemis 1, with a max design weight of 24.6 million pounds.
Thanks to Organic Marble for the wonderful picture of the crawler, where I agree with his count of 22 shoes on the ground at a time. With 22 shoes per track and 8 tracks per crawler, that gives 176 total shoes.
|Shoe area||Artemis I||At Maximum Capacity|
|1620 in2||75.1 PSI||86.3 PSI|
|1070 in2||114 PSI||131 PSI|
Taking a few of the the examples of ground pressures from the question,
|Object||Ground pressure (psi)|
|Road racing bicycle||90|
Unless my math above is heinously wrong, the ground pressure would seem to be within the range of some common vehicles.