| dc.description.abstract | The investigation of the cut-and-cover tunnel uplift in liquefiable soil has become a
significant concern due to the limitations of current uplift prediction equations, time-consuming
physical models, and restricted applicability of numerical models. The study of 5 centrifuge
tests at 50 g artificial gravity is conducted to simulate the seismic response of a rectangular
tunnel embedded in saturated sandy soils. The results revealed that the tunnel uplift is primarily
influenced by Arias Intensity and indicated a strong correlation, unlike other indices such as
peak ground acceleration, peak ground velocity, peak ground displacement, and cumulative
absolute velocity which showed no correlations with tunnel uplift. Moreover, the responses of
a rectangular tunnel in liquefiable soil under different input motions such as maximum ground
surface displacement, the angle of inclined failure surface in a rectangular tunnel, tunnel
rotation angles, tunnel uplifting, variation of safety factor, sensor displacement, and formation
of fluid flows were also examined. The findings highlight the significance of incorporating the
relationship between Arias Intensity and uplift into a prediction equation. This innovative
equation can serve as a benchmark for engineers, offering a reference for predicting uplift.
Additionally, this study enhances the understanding of the dynamic behavior of the rectangular
tunnel subjected to various input motions. | en_US |