Studies of the phenomenon of liquefaction on cohesive soils showed that loess liquefaction can occur in certain circumstances. Loess liquefaction mechanism is different from that of sand, involving dissolution of the soil structure salts. Loessial soils have high porosity, in the range of 45 ÷ 50%, and most of them are collapsible, meaning that settlements occur after flooding. During the earthquake, through loess collapse, pore water pressure increases and the low plasticity material liquefies and becomes susceptible to flow. In order to determine soil liquefaction potential of the analyzed area, are performed laboratory and in situ tests, as well as chemical analysis. The tests will follow both loess soil characterization but also the characterization in terms of liquefiability. Will be taking into account the soil behavior under dynamic conditions and the results will be compared with relevant data from case histories. In the end, suitable soil improvement solutions will have framed.
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