Current research provides results of experimental tests of soft water saturated clayey soils reinforced with vertical elements. Tests were performed by using compression-filtration equipment (odometers) at the laboratory of Soil, foundation and engineering geology of Kazan State University of Architecture and Building Construction. Main goal of current research is increase of experimental base that would confirm theoretical equations also under development by the Author. Article describes assumed reasons and justifications of processes going within models that are presented at the results of current research. Up to date society of geologists, researchers of foundations and soils under buildings and structures actively investigates potential methods of deformability parameters of soft water saturated clays and methods on calculation of similar strengthening. One of the most beneficial directions is reinforcement of soils mass that already has weak parameters.