Abstract: Compression of soft subsoils to support loads such as roadways, widened roadways, etc. with conventionally accomplished product piling surcharge onto the subsoils for a time long enough to compress them. The speed and undesirable compression (which often causes interference with aquifers) can be avoided by installing isolation slabs supported at or near the grade of the subsoil by caps resting on piles driven to sufficient depths to support the intended load. Fill can then be placed on the isolating slabs without the undesirable compression of the subsoil.