Abstract
Loessial collapsible soils are in the group of problematic soils and have been encountered in many parts of the world such as some regions in Iran. In these soils, sudden and large volume changes occur while the water content, overburden stress or both are passed a threshold limit. In this paper the collapse potential of a loessial soil taken from Gorgan; a city in Golestan province in North of Iran; has been investigated on both undisturbed and remolded specimens by using oedometer tests. For both types of samples, the effect of initial moisture content and also inundation stress have been investigated on the collapse potential and permeability behavior of the aforementioned soil. The results show that the type of specimen, initial water content, initial dry density and inundation stress have strong affect on collapse potential and permeability coefficient of the studied loess.
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