Journal of Mining and Environment

Current Issue

By Issue

By Author

By Subject

Author Index

Keyword Index

About Journal

Aims and Scope

Editorial Board

Publication Ethics

Indexing and Abstracting

Related Links

FAQ

Peer Review Process

News

Journal Forms

Journal Metrics

Formulation of a Bearing Capacity Equation for a Circular Footing with Vertical and Inclined Loads on Layered Sand

Document Type : Original Research Paper

Authors

Civil Engineering Department, NIT Hamirpur, Himachal Pradesh, India.

Abstract

This research work provides a bearing capacity equation for a circular footing placed on dense sand overlying loose sand and subjected to vertical and inclined loading, utilizing the limit equilibrium followed by the projected area approach. For the parametric study, the variables include upper dense sand layer thickness ratio (0.5 to 2.00), friction angle of upper dense sand (41° to 45°) and lower loose sand layer (31° to 35°), and applied load inclination (0° to 30°). The highest and lowest increases in bearing capacity are reported for friction angle combinations of 45°–35° and 41°–31° for various thickness ratios, respectively. For load inclinations of 0°, 10°, 20°, and 30°, bearing capacity is reduced by 43.51%, 72.17%, 85.64%, and 22.62%, 48.56%, 62.17% for friction angles of upper dense and lower loose sand layer combinations of 45° and 35° and at a thickness ratio of 0.5 and 2.0. Considering finite element results, the average deviation of the bearing capacity derived from the suggested equation at surface footing is 7%, 5%, 22%, and 23% for 0°, 10°, 20°, and 30° load inclinations, respectively. The proposed bearing capacity equation yield results that are compared with the available literature, with average deviations of 62%, 50%, 36%, and 36% for load inclination values of 0°, 10°, 20°, and 30°, respectively.

Keywords

References
[1]. Meyerhof, G.G. and Hanna, A.M. (1974). Ultimate Bearing Capacity of Foundation on Layered Soils Under Inclined Load. Can Geotech Journal. 15 (4): 565–72.
[2]. Meyerhof, G.G. and Hanna, A.M. (1978). Ultimate Bearing Capacity of Foundations on Layered Soils Under Inclined Load. Can Geotech Journal. 15 (4): 565–72.
[3]. Hanna, A.M. (1981). Foundation on Strong Sand Overlying Weak Sand. J Geotech Engrg Div.107(7): 915–27.
[4]. Michalowski, R.L. and Shi, L. (1995). Bearing capacity of footings over two-layer foundation soils. J Geotech Eng. 121 (5): 421–8.
[5]. Al-Adly, A.I.F., Fadhil, A.I. and Fattah, M.Y. (2019). Bearing capacity of isolated square footing resting on contaminated sandy soil with crude oil. Egypt J Pet [Internet]. 28 (3): 281–8. Available from: https://doi.org/10.1016/j.ejpe.2019.06.005
[6]. Das, P.P. and Khatri, V.N. (2020). Bearing capacity estimation of shallow foundations on dense sand underlain by loose sand strata using finite elements limit analysis. Lect Notes Civ Eng. 84, 203–14.
[7]. Gupta, S. and Mital, A. (2022). A comparative study of bearing capacity of shallow footing under different loading conditions. Geomech Geoengin [Internet]. 17 (4): 1338–49. Available from: https://doi.org/10.1080/17486025.2021.1940310
[8]. Khatri, V.N., Kumar, J. and Akhtar, S. (2017). Bearing capacity of foundations with inclusion of dense sand layer over loose sand strata. Int J Geomech. 17(10): 1–8.
[9]. Das, P.P., Khatri, V.N. and Kumar, J. (2022). Bearing capacity of strip and circular footing on layered sand with geogrid at the interface. Arab J Geosci [Internet]. 15 (4): 1–13. Available from: https://doi.org/10.1007/s12517-022-09614-1
[10]. Joshi, V.C., Dutta, R.K.and Shrivastava, R. (2015). Ultimate bearing capacity of circular footing on layered soil. J Geoengin. 10 (1): 25–34.
[11]. Okamura, M., Takemura, J.and Kimura, T. (1998). Bearing capacity predictions of sand overlying clay based on limit equilibrium methods. Soils Found. 38 (1): 181–94.
[12]. Kumar, A., Ohri, M.L.and Bansal, R.K. (2007). Bearing capacity test of strip footings on reinforced layered soil. Geotech Geol Eng. 25 (2): 139–50.
[13]. Nikraz, H.M.A. (2015). Bearing Capacity Evaluation of Footing on a Layered‐Soil using ABAQUS. J Earth Sci Clim Change. 06 (03).
[14]. Misir, G.and Laman, M. (2017). A modern approach to estimate the bearing capacity of layered soil. Period Polytech Civ Eng. 61 (3): 434–46.
[15]. Kumar, V.S.K.R.D.T.K (2018). Behaviour of Foundation in Layered Soils. Int J Sci Res [Internet]. 7(1): 1075–8. Available from: https://www.ijsr.net/ archive/v7i1/ART20179556.pdf
[16]. Shoaei, M.D., Alkarni, A., Noorzaei, J., Jaafar, M.S.and Huat, B.B.K. (2012). Review of available approaches for ultimate bearing capacity of two-layered soils. J Civ Eng Manag. 18 (4): 469–82.
[17]. Rao, P., Liu, Y., and Cui, J. (2015). Bearing capacity of strip footings on two-layered clay under combined loading. Comput Geotech [Internet]. 69, 210–8. Available from: http://dx.doi.org/10.1016/j.com pgeo.2015.05.018
[18]. Al-Ameri, A.F., Hussein, S.A., and Mekkiyah, H. (2020). Estimate the bearing capacity of full-scale model shallow foundations on layered-soil using Plaxis. Solid State Technol [Internet]. 63 (1): 1775–87. [19]. Tajeri, S., Sadrossadat, E., and Bazaz, J.B. (2015). Indirect estimation of the ultimate bearing capacity of shallow foundations resting on rock masses. Int J Rock Mech Min Sci [Internet]. 80,107–17. Available from: http://dx.doi.org/10.1016/j.ijrmms. 2015.09.015
[20]. Panwar, V.and Dutta, R.K. (2021). Bearing capacity of rectangular footing on layered sand under inclined loading. J Achiev Mater Manuf Eng. 108 (2): 49–62.
[21]. Singh, S.P.and Roy, A.K. (2021). Numerical Study of the Behaviour of a Circular Footing on a Layered Granular Soil Under Vertical and Inclined Loading. Civ Environ Eng Reports. 31 (1): 29–43.
[22]. Alavi, A.H.and Sadrossadat, E. (2016). New design equations for estimation of ultimate bearing capacity of shallow foundations resting on rock masses. Geosci Front [Internet]. 7 (1): 91–9. Available from: http://dx.doi.org/10.1016/j.gsf.2014.12.005
[23]. BIS:6403 (1981). Code of Practice for Determination of Breaking Capacity of Shallow Foundations. Bur Indian Stand New Delhi.
[24]. Bowles, J.E. (1977). Foundation analysis and design. New York: McGraw-Hill.
Journal of Mining and Environment
Volume 13, Issue 4
October 2022
Pages 1015-1029
Files
Share
How to cite
Statistics