Yazarlar: Atilla Horoz, Özgür Kuruoğlu
Yayın Yeri : Proceedings of the 18th International conference on soil Mechanics and Geotechnical Engineering, Paris
Yayın Yılı : 2013
Açıklama : This study uses a 3D finite element program, calibrated with the results of a full scale instrumented load test on a
limited size footing, to estimate the settlement improvement factor for footings resting on rammed aggregate pier groups. A simplified
3D finite element model (Composite Soil Model) was developed, which takes into account the increase of stiffness around the piers
during the ramming process. Design charts for settlement improvement factors of square footings of different sizes
(B = 2.4m to 4.8m) resting on aggregate pier groups of different area ratios (AR = 0.087 to 0.349), pier moduli
(Ecolumn = 36MPa to 72MPa), and with various compressible clay layer strengths (cu = 20kPa to 60kPa) and thicknesses
(L = 5m to 15m) were prepared using this calibrated 3D finite element model. It was found that, the settlement improvement factor
increases as the area ratio, pier modulus and footing pressure increase. On the other hand, the settlement improvement factor is
observed to decrease as the undrained shear strength and thickness of compressible clay and footing size increase.