Evaluating of Bearing Capacity of Two Adjacent Strip Foundations Located around a Soil Slip

Authors: M. Meftahi, M. Hoseinzadeh, S. A. Naeini

Abstract:

Selection of soil bearing capacity is an important issue that should be investigated under different conditions. The bearing capacity of foundation around of soil slope is based on the active and passive forces. On the other hand, due to extension of urban structures, it is inevitable to put the foundations together. Concerning the two cases mentioned above, investigating the behavior of adjacent foundations which are constructed besides soil slope is essential. It should be noted that, according to the conditions, the bearing capacity of adjacent foundations can be less or more than mat foundations. Also, soil reinforcement increases the bearing capacity of adjacent foundations, and the amount of its increase depends on the distance between foundations. In this research, based on numerical studies, a method is presented for evaluating ultimate bearing capacity of adjacent foundations at different intervals. In the present study, the effect of foundation width, the center to center distance of adjacent foundations and reinforced soil has been investigated on the bearing capacity of adjacent foundations beside soil slope. The results indicate that, due to interference of failure surfaces created under foundation, it depends on their intervals and the ultimate bearing capacity of foundation varies.

Keywords: Adjacent foundation, bearing capacity, reinforcements, settlement, numerical analysis.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.3299609

References:

[1] L. Prandtl, “Über die Eindringungsfestigkeit (Härte) plastischer Baustoffe und die Festigkeit von Schneiden,” Journal of Applied Mathematics and Mechanics, vol.1, 1921, pp.15-20. (In German).
[2] H. Reissner, “Zum Erddruckproblem (Concerning the earth-pressure problem),” Proc. 1st Int. Congress of Applied Mechanics, Delft, 1924, pp. 295–311.
[3] K. Terzaghi, “Structure and volume of voids of soils,” (1925), Pages 10, 11, 12, and part of 13 of Erdbaumechanik auf Bodenphysikalisher Grundlage, translated by A. Casagrande in From Theory to Practice in Soil Mechanics, John Wiley and Sons, New York, 1960, pp. 146–148.
[4] G. G. Meyerhof, “Bearing capacity and settlement of pile foundations,” Journal of Geotechnical Engineering, ASCE, vol. 91 (2), 1965, pp. 21–31.
[5] J. B. Hansen, “A Revised Extended Formula for Bearing Capacity,” Danish Geotechnical Institute Bulletin, vol.28, 1968.
[6] E.E. De Beer, “Experimental determination of the shape factors and the bearing capacity factors of sand,” Journal of Geotechnique., vol. 20 (4), 1970, pp. 387–411.
[7] J. G. Sieffert, and Ch. Bay-Gress, “Comparison of the European bearing capacity calculation methods for shallow foundations Geotechnical Engineering,” Institution of Civil Engineers, vol.143, 2000, pp.65-74.
[8] V. A. Guido, D. K. Chang, and M. A. Sweeney, “Comparison of geogrid and geotextile reinforced earth slabs,” Canadian Geotechnical Journal., vol. 23, 1986, pp. 435–440.
[9] M. T. Omar, B. M. Das, V. K. Puri, and S. C. Yen, “Ultimate Bearing capacity of shallow foundations on sand with geogrid reinforcement,” Canadian Geotechnical Journal, 1993, vol. 30, pp. 545–549.
[10] T. Yetimoglu, J. T. H. Wu, and A. Saglamer, “Bearing capacity of rectangular footings on geogrid reinforced sand,” Journal of Geotechnical and Geoenvironmental Engineering—ASCE., vol. 120 (12), 1994, pp. 2083–2099.
[11] 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., vol. 123 (1), 1997, pp. 66–72.
[12] C. C. Huang, and L. L. Hong, “Ultimate bearing capacity and settlement of footings on reinforced sandy ground,” Soils and Foundations, vol. 9 (5), 2000, pp. 65–73.
[13] J. H. Boushehrian, and N. Hataf, “Experimental and numerical investigation of the bearing capacity of model circular and ring footings on reinforced sand,” Geotextiles and Geomembranes., vol. 23 (2), 2003, pp. 144–173.
[14] A. Alimardani, and M. Ghazavi, “Behavior of closely spaced square and circular footings on reinforced sand,” Soils and Foundations J. vol. 52(1), 2012, pp.160–167.
[15] C. R. Patra, B. M. Das, M. Bhoi, and E. C. Shin, “Eccentrically loaded strip foundation on geogrid-reinforced sand,” Geotextiles and Geomembranes., Vol. 24, 2006, pp. 254–259.
[16] A. Al. Tirkity, and Al. Taay, “Bearing capacity of eccentrically loaded strip footing on geogrid reinforced sand,” Journal of Engineering Sciences, vol. 19 (1), 2012, pp. 14-22.
[17] K. Y. Rakesh, S. Swami and Sh. Daya, “Interference between Two Adjacent Footings Located in Seismic Region,” Geosciences, vol. 7(4), 2017, pp.129-140.
[18] R. Acharyya, and A. Dey, “Importance of dilatancy on the evolution of failure mechanism of a strip footing resting on horizontal ground,” 2018. INAE Letters DOI: 10.1007/s41403-018-0042-3.