Increasing the size of the contact area on the ground (the footprint) in relation to the weight decreases the ground pressure. Ground pressure of 2 PSI or less is recommended for fragile ecosystems like marshes. Decreasing the ground pressure increases the flotation, allowing easier passage of the body over soft terrain. This is often observed in activities like snowshoeing.
Rubber-tracked ATV: 0.75 psi
Diedrich D-50 - T2 Drilling rig: 3.8 psi
Human Male (1.8 metre tall, medium build): 8 psi
M1 Abrams tank: 15 psi
1993 Toyota 4Runner / Hilux Surf: 25 psi
Passenger car: 30 psi
Wheeled ATV: 35 psi
Mountain bicycle: 40 psi
Racing bicycle: 90 psi
Note pressures for Man and Horse are for standing still. A walking human will exert double it's standing pressure. A galloping horse will exert up to 500 psi
Patent No. 7,740,419 Issued on June 22, Assigned to Maruyama Kougyo for Soft Ground Improvement Method (Japanese Inventor)
Jun 23, 2010; ALEXANDRIA, Va., June 25 -- Kazuyoshi Nakakuma, Saitama, Japan, has developed a method for improving soft ground. The inventor...
WIPO ASSIGNS PATENT TO HNT ENVIRONMENTAL CONSTRUCTION DEVELOPMENT FOR "CONSTRUCTION METHOD FOR IMPROVING SOFT GROUND" (SOUTH KOREAN INVENTORS)
Sep 24, 2010; GENEVA, Sept. 25 -- Publication No. WO/2010/059016 was published on May 27. Title of the invention: "CONSTRUCTION METHOD FOR...