NONLINEAR CHARACTERISTICS OF HORIZONTAL SUBGRADE REACTION OF PILE IN LIQUEFIED SOIL BASED ON SHAKING TABLE TEST

Shaking table tests and a static horizontal loading test are conducted to investigate coefficient of subgrade reaction of pile in liquefied soil. It is shown that (1) The relation between subgrade reaction and pile displacement obtained from the static horizontal loading test can be modeled in the hyperbolic function; (2) The relation between subgrade reaction and relative displacement during liquefaction obtained from shaking table test can be modeled by considering the excess pore water pressure variation and hyperbolic function; (3) The experimental result can be explained the best, when that subgrade reaction was proportional power of 0.5 to 1.0 of the pressure was assumed.