This research investigates behavior of gravel drain piles under high-level earthquake loading beneath
the structures foundation. To achieve this purpose one of the waste water septic tank project in north
of Persian Gulf in Hormoz Island was selected as a
case study to find suitability of gravel drain pile
system to reduce excess pore water pressure. According to high susceptibility of local soil layers
liquefaction and its short distance of waste water tank to the sea, the mentioned project becomes one
of the most important issues regarding geo-enviro
nmentally hazards impact after tank structural
collapsing. The drain piles were used to control excess pore water pressures beneath the foundation of
mentioned project. Furthermore, different static and cyclic triaxial tests, Standard Penetration Test
(SPT), the hydraulic conductivity and density
tests were conducted to enhance the proper
understanding of the dynamic behavior of soil layer under the foundation. According to the numerical
modeling results, using these drain piles has focal effects on the excess pore water pressure rate and
creates a liquefaction zone during
the time of earthquake loading