Experimental Testing and Analytical Modeling of Strip Footing in Reinforced Sandy Soil with Multi-Geogrid Layers Under Different Loading Conditions
American Journal of Civil Engineering
Volume 4, Issue 1, January 2016, Pages: 1-11
Received: Jan. 20, 2016; Accepted: Jan. 30, 2016; Published: Feb. 19, 2016
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Aram Mohammed Raheem, Civil Engineering Department, University of Kirkuk, Kirkuk, Iraq
Mohammed Abdulsalam Abdulkarem, Geotechnical Engineer, Ministry of Construction and Housing, Kirkuk, Iraq
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In this study, large-scale physical models with dimensions of (0.9m * 0.9m * 0.55m) have been designed and constructed to investigate the behavior of strip footing in reinforced sandy soil with multi-geogrid layers under inclined and eccentric loading conditions. The effect of several parameters such as geogrid layers (N), soil relative density (RD), depth of the topmost geogrid layer (U/B), load inclination angle () and load eccentricity ratio (e/B) on the bearing capacity ratio (BCR) of reinforced soil have been investigated through 120 experimental tests. As the number of the geogrid layers increased from 0 to 4, the BCR increased by 255% for 15o load inclination angle and by 470% for 0.05 load eccentricity ratio in 60% RD. When the RD of the soil increased from 60% to 80%, the average decreases in horizontal displacement and footing tilting angle were about 35% and 21% respectively. Hyperbolic analytical model was used to predict the relationships of most of the studied parameters. However, p-q analytical model was suggested to model the relationship between the BCR versus U/B. Both suggested models (hyperbolic and p-q) were in a very good agreement with the experimental results.
Strip Footing, Experimental Study, Sandy Soil, Geogrid, Analytical Models, Different Loading Condition
To cite this article
Aram Mohammed Raheem, Mohammed Abdulsalam Abdulkarem, Experimental Testing and Analytical Modeling of Strip Footing in Reinforced Sandy Soil with Multi-Geogrid Layers Under Different Loading Conditions, American Journal of Civil Engineering. Vol. 4, No. 1, 2016, pp. 1-11. doi: 10.11648/j.ajce.20160401.11
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