液状化して側方流動する地盤中の群杭の挙動

抄録

A series of shaking table model tests have been carried to observe the behavior of group pile foundation subjected to laterally spreading liquefied soil in gently-sloping deposits triggered by strong sinusoidal ground motion. A 3 x 3 group pile foundation, free at the top, was placed in saturated silt-sand soil and instrumented by strain gauges to measure bending moment distribution of its component piles in different soil density and slope. The soil displacement was measured by means of colored sand Marker lines and compared with inclinometers; also, the soil was instrumented with pore water pressure transducer and accelerometers. Results show that the maximum bending moments measured are influenced by changes in the soil density and slope, being the changes in the slope, the most influenced factor.