Liquefaction represents loss of the shear strength and shear resistance of the saturated soil due to the sudden increase in pore pressure caused by monotonous, impulsive or repeated loads. The earthquake is one of the most common factors for the onset of liquefaction.
The thesis describes the basic mechanism of the loss of shear strength of the soil that may result in the ground liquefaction. Two types of liquefaction (soil liquefaction and cyclic mobility) are described together with the conditions for their occurence and the characteristics of both phenomena.
The geological conditions and material properties required for liquefaction are presented and the criteria for liquefaction innitiation proposed by some authors are given. The influence of earthquake parameters as a triggering event for liquefaction are also discussed. Historical examples and theoretical knowledge are used to describe the consequences of and the usual measures to be taken against liquefaction.
In the practical part of the thesis we evaluate the liquefaction potential using the results of CPT investigation, which is widely used geotechnical in-situ test method. Susceptibility of the ground for the liquefaction occurance was assessed on the basis of known methods (Robertson and Wride, 1998 and Boulanger and Idriss, 2014) and the results of both were compared. The data from port of Ploče in Croatia were used. A short description of the site with its geological and seismological properties is included. Finaly, the remedial measures for the upper sandy layer that was found to be prone to liquefaction, were proposed.