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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Authors
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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Abstract
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.
Keywords
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
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
References
[1]
El Sawwaf M. (2009). “Experimental and Numerical Study of Eccentrically Loaded Strip Footings Resting on Reinforced Sand,” Journal of Geotechnical and Geoenvironmental Engineering ASCE, 135(10), 1509-1517, DOI: 10.1061/ASCEGT.1943-5606.0000093.
[2]
LU Liang, Wang Zong-Jian and K. Arai (2014). “Numerical and Experimental Analyses for Bearing Capacity of Rigid Strip Footing Subjected to Eccentric Load,” J. Cent. South Univ., 21, 3983−3992, DOI: 10.1007/s11771-014-2386-5.
[3]
Dewaikar D. M., Guptha K. G. and Chore H. S. (2011). “Behavior of Eccentrically Loaded Model Square Footing on Reinforced Soil: An Experimental Investigation,” Proceedings of Indian Geotechnical Conference, December 15-17, Kochi (Paper No. D-380).
[4]
Meyerhof G. G. (1953). “The Bearing Capacity of Footings under Eccentric and Inclined Loads,” Proc., 3rd Int. Conf. on Soil Mech. and Found. Engrg., 1, 440–445.
[5]
Mahiyar H. and Patel A. N. (2000). “Analysis of Angle Shaped Footing under Eccentric Loading,” J. Geotech. Geoenviron. Eng., 126(12), 1151–1156, DOI: 10.1061/(ASCE)1090-0241(2000)126:12(1151).
[6]
Zhang M. X., Qiu C. C., Javadi A. A. and Zhang S. L. (2014).” Model Tests on Reinforced Sloped Embankment with Denti-Strip Inclusions under Monotonic Loading,” KSCE Journal of Civil Engineering, 18(5), 1342-1350, DOI: 10.1007/s12205-014-0222-y.
[7]
Guido V. A., Chang D. K., and Sweeney M. A. (1986). “Comparison of Geogrid and Geotextile Reinforced Earth Slabs,” Can. Geotech. J., 23(4), 435–440., DOI: 10.1139/t86-073.
[8]
Huang C. C. and Tatsuoka K. (1990). “Bearing capacity of reinforced horizontal sandy ground,” Geotextile and Geomembranes, 9(1), 51-82.
[9]
Yoo W., Kim B. and Cho W. (2015). “Model Test Study on the Behavior of Geotextile-Encased Sand Pile in Soft Clay Ground,” KSCE Journal of Civil Engineering, 19(3), 592-601, DOI: 10.1007/s12205-012-0473-4.
[10]
Chakraborty D. and Kumar J. (2014). “Bearing Capacity of Strip Foundations in Reinforced Soils,” International Journal of Geomechanics, 14(1), February 1, 45-58. DOI: 10.1061/(ASCE)GM.1943- 5622.0000275.
[11]
Yetimoglu T., Jonathan T. H. Wu and Ahmet S. (1994). “Bearing Capacity of Rectangular Footings on Geogrid-Reinforced Sand,” Journal of Geotechnical Engineering, 120(12), 2083-2099, DOI: 10.1061/(ASCE)0733-9410(1994)120: 12(2083).
[12]
Binquet J. and Lee K. L. (1975). “Bearing Capacity Tests on Reinforced Earth Slabs,” J. Geotech. Engrg. Div., 101(12), 1241–1255.
[13]
Fragaszy R. and Lawton E. (1984). “Bearing Capacity of Reinforced Sand Subgrades,” J. Geotech. Engrg., 1500–1507, DOI: 10.1061/(ASCE)0733-9410(1984)110:10(1500).
[14]
Khing K., Das B. M., Puri V. K., Cook E. E., and Yen S. C. (1993). “The Bearing Capacity of A Strip Foundation on Geogrid-Reinforced Sand,” Geotext. Geomembr., 12(4), 351–361.
[15]
Omar M. T., Das B. M., Puri V. K., and Yen S. C. (1993). “Ultimate Bearing Capacity of Shallow Foundations on Sand With Geogrid Reinforcement,” Can. Geotech. J., 30(3), 545–549, DOI: 10.1139/t93-046.
[16]
Shin E. C., Das B. M., Puri V. K., Yen S.-C. and Cook E. E. (1993). “Bearing Capacity of Strip Foundation on Geogrid-Reinforced Clay,” J. ASTM Geotech Test., 16(4), 534–541, Paper ID GTJ10293J.
[17]
Das B. M., Shin E. C. and Omar M. T. (1994). “The Bearing Capacity of Surface Strip Foundation on Geogrid-Reinforced Sand and Clay—A Comparative Study,” Geotech. Geol. Eng., 12(1), 1–14.
[18]
Das B. M. and Omar M. T. (1994). “The Effects of Foundation Width on Model Tests For The Bearing Capacity of Sand With Geogrid Reinforcement,” Geotech. Geol. Eng., 12(2), 133–141.
[19]
Asaoka A., Kodaka T. and Pokhaerl G. (1994). “Stability Analysis of Reinforced Soil Structures Using Rigid Plastic Finite Element Method,” Soils Found., 34(1), 107–118.
[20]
Ochiai H., Otani J., Hayashic S. and Hirai, T. (1996). “The Pull-Out Resistance of Geogrids in Reinforced Soil,” Geotextiles and Geomembranes, 14(1), 19-42, DOI: S0266-1144(96)00027- I.
[21]
Ghazavi M and Lavasan A. A. (2008). “Interference Effect of Shallow Foundations Constructed on Sand Reinforced With Geosynthetics,” Geotext Geomembr, 26, 404–415, DOI: 10.1016/j.geotexmem.2008.02.003.
[22]
Reza N. and Ebrahim M. (2014). “Bearing Capacity of Two Close Strip Footings on Soft Clay Reinforced With Geotextile,” Arab J Geosci, 7, 623–639, DOI: 10.1007/s12517-012-0771-7.
[23]
Won M. S., Ling H. I. and Kim Y. S. (2004). “A Study of the Deformation of Flexible Pipes Buried Under Model Reinforced Sand,” KSCE Journal of Civil Engineering, 8(4), 377-385, DOI: 10.1007/BF02829161.
[24]
Vipulanandan C. and Kirshnan S. (1993). “XRD Analysis and Leachability of Solidified Phenol–Cement Mixtures,” Cem. Concr. Res., 23,792–802, DOI: 10.1016/0008-8846(93)90033-6.
[25]
Ata A. and Vipulanandan C. (1998). “Cohesive and Adhesive Properties of Silicate Grout on Grouted – Sand Behavior,” J. Geotech. Geoenviron. Eng., 124(1), 38–44, DOI: 10.1061/(ASCE)1090-0241(1998)124:1(38)).
[26]
Vipulanandan C., AhossinY. J. and Bilgin O. (2007). “Geotechnical Properties of Marine and Deltaic Soft Clays,” GSP173 Adv. Meas. Model. Soil Behav., 1–13, DOI: 10.1061/40917(236)5.
[27]
Usluogullari O., VipulanandanC. (2011). “Stress–Strain Behavior and California Bearing Ratio of Artificially Cemented Sand.” J. Test. Eval., 39(4), 1–9, Paper ID JTE103165.
[28]
Vipulanandan C., Raheem A. M., Basirat B., Mohammed A. and Richardson D. (2014).” New Kinetic Model to Characterize the Filter Cake Formation and Fluid Loss in HPHT Process”, OTC, 25100-MS, Houston, TX, 5-8 May, 1-17, DOI: 10.4043/25100-MS.
[29]
Raheem A. M and Vipulanandan C. (2014). “Effect of Salt Contamination on the Bentonite Drilling Mud Shear Strength and Electrical Resistivity,” THC Proceedings Conference & Exhibition, Houston, TX, USA.
[30]
Vipulanandan C. and Raheem A. M. (2015). “Rapid Detection of Salt Contamination in Bentonite Drilling Mud in Deep Oil Well Applications,” AADE National Technical Conference and Exhibition, San Antonio, Texas, April 8-9, 15-NTCE-30, pp. 1-7.
[31]
Mebarkia S. and Vipulanandan C. (1992). “Compressive Behavior of Glass-Fiber-Reinforced Polymer Concrete,” J Mater Civ Eng, 4(1), 91–105, DOI: 10.1061/(ASCE)0899-1561(1992)4:1(91).
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