Abstract
AbstractThe stress-strain behavior of clayey soil is time dependent. Laboratory study and constitutive modeling of the time-dependent stress-strain behavior are needed to understand the soil behavior and analyze displacements of reclamation works and foundations on clayey soils. The stress relaxation, as one of the significant time-dependent phenomena in clayey soils, has been observed and examined in excavations and constructions, such as the short-term change in lateral earth pressure after installation of a supporting system. In this study, Hong Kong marine deposits (HKMDs), which are clayey soils, and a sand-mixed bentonite (SMB) soil were investigated in relaxation tests. Relaxations were performed in both the loading stage and the unloading stage. This paper is focused on the testing study and modeling of the time-dependent relaxation behavior of clayey soils. Relaxation tests were carried out to measure the changes of the effective stress with time in one-dimensional (1D) straining condition. A new...
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