is desert soil expansive
The problem of âexpansive soilsâ is well. known to engineers and builders. It affects. construction sites throughout the US and. Canada, and particularly those in the desert, Rocky Mountain and the mid continent. regions. Whether the cause is âclay heaveâ from naturally. occurring shrinkable or swelling clay soils, expansive shale or overburden recovery associated. with excavation, if the movement is restrained the. lateral and uplift forces produced are massive.