1 Uni ver sity of War saw, Fac ulty of Ge ol ogy, 炉wirki i Wigury 93, 02-089 Warszawa, Po land 2 Cra cow Uni ver sity of Tech nol ogy, Fac ulty of En vi ron men tal En gi neer ing, Warszawska 24, 30-155 Krak贸w, Po land Dobak, P., Gaszy帽ski, J., 2015. Eval u a tion of soil per me abil ity from con sol i da tion anal y sis based on Terzaghi's and Biot's theories. Geo log i cal Quar terly, 59 (2): 373-381, doi: 10.7306/gq.1197Proper eval u a tion of per me abil ity pa ram e ters has a cru cial sig ni fi ca tion in multi-scale pre dic tion of con sol i da tion. Drain age path is con nected with the time of one-di men sional con sol i da tion in Terzaghi's the ory and nu mer ous later so lu tions. That is why the eval u a tion of per me abil ity fac tor al lows to model the set tle ment's time of geo log i cal lay ers based on re sults ob tained on a lab o ra tory scale. Nu mer ous tests show a dif fer ence of the con sol i da tion de gree ob tained from one-di men sional strain course and pore pres sure dis tri bu tion. Eval u a tion of con sol i da tion co ef fi cient c v based on a newly pro posed method al lows better un der stand ing of the ba sic rea sons of un con ven tional be hav iour of tested soils. Un paral lel char ac ter is tics of strain and pore pres sure dis tri bu tion show im por tant role of soil's skel e ton creep and its re la tion to per me abil ity as pects. So lu tions pro posed by Biot's the ory al low ana lys ing the dif fer ent ve loc ity of strain and pore pres sure dis tri bu tion. The ar ti cle pres ents a new ap prox i mated method based on Terzaghi's the ory and eval u a tion of pa ram e ters which are nec es sary in ap pli ca tion of Biot's one-di men sional so lu tion. These pa ram e ters are con nected with com press ibil ity and co ef fi cient of per me abil ity. The goal of pre sented meth od olog i cal stud ies is com par i son be tween per me abil ity ob tained from ap pli ca tion of Terzaghi's and Biot's theories. It al lows try ing to ex plain phys i cal rea sons of dif fer ences be tween ap plied mod els and test ing re sults, and improv ing the meth od ol ogy of one-di men sional con sol i da tions tests. Key words: con sol i da tion, co he sive soils, Terzaghi's the ory, Biot's the ory, per me abil ity, geo log i cal bar ri ers, in su la tion proper ties.