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Numerical Study of Cyclic Behavior of Shallow Foundations on Sand Reinforced with Geogrid and Grid-Anchor

Authors: Alireza Hajiani Boushehrian, Nader Hataf, Arsalan Ghahramani


When the foundations of structures under cyclic loading with amplitudes less than their permissible load, the concern exists often for the amount of uniform and non-uniform settlement of such structures. Storage tank foundations with numerous filling and discharging and railways ballast course under repeating transportation loads are examples of such conditions. This paper deals with the effects of using the new generation of reinforcements, Grid-Anchor, for the purpose of reducing the permanent settlement of these foundations under the influence of different proportions of the ultimate load. Other items such as the type and the number of reinforcements as well as the number of loading cycles are studied numerically. Numerical models were made using the Plaxis3D Tunnel finite element code. The results show that by using gridanchor and increasing the number of their layers in the same proportion as that of the cyclic load being applied, the amount of permanent settlement decreases up to 42% relative to unreinforced condition depends on the number of reinforcement layers and percent of applied load and the number of loading cycles to reach a constant value of dimensionless settlement decreases up to 20% relative to unreinforced condition.

Keywords: Numerical Analysis, Reinforced Soil, cyclic loading, shallow foundation, Grid-Anchor

Digital Object Identifier (DOI):

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[1] J. Binquet, J. and K. L. Lee, "Bearing capacity tests on reinforced earthslabs." Journal of Geotechnical Engineering ASCE 101 (12), 1975, pp 1241-1255.
[2] C.C Huang,., F. Tatsuoka,. "Bearing capacity of reinforced horizontal sandy ground." Geotextiles and Geomembranes, 9 (1), 1990, pp. 51-82.
[3] N. Hataf and M.H.Bazyar, "Use of tire shreds for bearing capacity improvement of shallow footings on sands." Presented in The 3rd Int Conf. on Ground Improvement Techniques, Singapore, 2000.
[4] V. A. Guido, D. K. Chang, and M. A. Sweeny, "Comparison of geogrid and geotextile reinforced slabs." Canadian Geotechnical Journal, (23), 1986, pp 435-40,
[5] A.H. Boushehrian. and N. Hataf, "Bearing capacity of ring footings on reinforced clay." in Proce. 12th. Conf. of Int. Assoc. for Computer Methods and Advances in Geomechanics (IACMAG), Goa, India, 2008, pp. 3546-3551.
[6] T. Yetimoglu, J. T. H. Wu and A. Saglamer, "Bearing capacity of rectangular footings on geogrid-reinforced sand." Journal of Geotechnical Engineering ASCE, 120 (12): 1994, pp.2083-2099.
[7] M. T. Adams and J. G. Collin, "Large model spread footing load tests on geosynthetic reinforced soil foundations," Journal of Geotechnical and Geoenvironmental Engineering ASCE, 123(1): 1997, pp. 66-72.
[8] B. M. Das and E. C. Shin, "Strip footing on geogrid reinforced clay: behaviour under cyclic loading," Geotextiles and Geomembranes, 13, 1994. pp 657-667.
[9] N. Unikrishnan, K. Rajagopal and N. R. Krishnaswamy, "Behavior of reinforced clay under monotonic and cyclic loading." Geotextile and Geomembranes, 20, , 2002, pp 117-133.
[10] J. H. Boushehrian and N. Hataf, "Experimental and numerical investigation of the bearing capacity of model circular and ring footings on reinforced sand." Journal of Geotextiles and Geomembranes (21), 2003, pp. 241-256.
[11] W. Chung and G. Cascante, " Experimental and numerical study of soilreinforcement effects on the low-strain stiffness and bearing capacity of shallow foundations." Geotechnical and Geological Engineering, 25, 2006, pp. 265-281.
[12] M. Mosallanezhad, N. Hataf and A. Ghahramani, "Experimental study of bearing capacity of granular soils, reinforced with Innovative Grid- Anchore system." Geotechnical and Geological Engineering, 25 (1), 2007, pp 123-137.
[13] Shin, E. C. Das, B. M. and Atalar, C., "Cyclic plate load test on geogridreinforced granular pad." Unpublished Material, 2008.
[14] A.H. Boushehrian. and N. Hataf, "Numerical behavior of shallow foundation on reinforced sand."Presented in the 8th Int-l Congress on Civil Eng., Shiraz, I.R. Iran, 2009.
[15] A.H. Boushehrian. and N. Hataf and A. Ghahramani, "An investigation on the cyclic behavior of shallow foundations resting on Grid-Anchor reinforced sand." KSCE Journal of Civil Engineering (KJCE), Korean Society of Civil Engineers, submitted for publication, 2009.
[16] A.H. Boushehrian. and N. Hataf and A. Ghahramani, "Experimental and numerical behavior of shallow foundations on sand reinforced with geogrid and Grid-Anchor sand under cyclic loading." Sientia Iranica International journal of Science and Technology, Sharif University of Technology Press, submitted for publication, 2009.