BEHAVIOR OF GEOGRID-PILE FOUNDATION SYSTEM IN LOOSE SANDY SOILS UNDER HALABJAH EARTHQUAKE

Abstract

Due to the increase in seismic activity in Iraq recently and the need to reduce the damage to the foundations, this research has been carried out in order to study the response of the pile foundation reinforced by geogrid in loose sandy soils.  Because of the paucity of information linking the pile foundations with geogrid, the geogrid used in this research to reinforce the loose sandy soil under earthquake loading. Three types of geogrid are used in loose sand under the influence of the largest wave of earthquakes hit the regions of Iraq zones known Halabjah earthquake. Results predict the impact of treatment on the piles, and to study the settlement, horizontal displacements and bending moment of the piles, as well as the accelerations and pore water pressure of the soil. It was concluded that adding geogrid to the pile foundation would be reduced settlement, horizontal displacement, tip load and bending moment of the pile.