Cyclic Shear Behavior of Unsaturated Soil with Varying Pore Water and Pore Air Condition

Abstract

The objective of this study is to identify the deformation characteristics and pore water state of unsaturated soils during dynamic loading. In this study, laboratory tests have been carried out to understand the liquefaction behavior of unsaturated soil with the varied pore water state. To change the moisture condition in the unsaturated soil air entraining agent was added into the unsaturated soil sample to forcibly change the state of the pore air and pore water and to imitate the condition of soil during mudflow slope failure due to the earthquake. As the test results, it is concluded that the dynamic deformation behavior of unsaturated soil is not determined only by the amount of water but also greatly depending on water state (pore air and pore water).