Shaking Table Tests on Model Pile in Saturated Sloping Ground

Shaking Table Tests on Model Pile in Saturated Sloping Ground

For the study of soil-structure interaction, including the effect of lateral spreading, in a saturated sloping ground during earthquake, shaking table tests on a model pile in an inclined large biaxial laminar shear box filled with saturated clean sand were conducted at the National Center for Research on Earthquake Engineering(NCREE), in Taiwan. The pile tip was fixed at the bottom of the shear box to simulate the condition of a pile foundation embedded in a firm stratum. The pile top was mounted with 6 steel disks to simulate the superstructure. Input shakings including sinusoidal and recorded earthquake accelerations were imposed either perpendicular or parallel to the slope direction. Strain gauges and accelerometers were placed on the pile surface to obtain the response of the pile under shaking. The near-field and far-field soil responses, including pore water pressure changes, accelerations, and settlements were also measured. The lateral spreading displacement of the soil and pile behavior were observed and evaluated while soil liquefaction was triggered under shakings in either direction.