Abstract
The contribution made by osmotic suction to unsaturated shear strength analysis has not been considered for the past few decades. Osmotic suction is generated by the salt in pore water, especially in coastal environments, and it can be more significant than matric suction. Tree roots can also induce osmotic and matric suction by continuous transpiration, and when these saline and rooted environments are combined under unsaturated conditions, they can challenge conventional shear strength models. Electrical resistivity can be used as a proper tool to evaluate the properties of soil in a large scale. This review summarizes the historical development of studies related to osmotic suction as well as the present situation of osmotic suction for soil shear strength.
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