Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science

EVALUATION BEARing CAPACITY OF RING FOOTINGS ON REINFORCED LOOSE SAND


DOI: 10.5937/jaes0-37350 
This is an open access article distributed under the CC BY 4.0
Creative Commons License

Volume 21 article 1047 pages: 29-35

Sabah Hassan Fartosy*
Department. of Water. Resources Engineering, Engineering College, Mustansiriyah University, Palestine St., Baghdad, Iraq

Faris Waleed Jawad
Department. of Water. Resources Engineering, Engineering College, Mustansiriyah University, Palestine St., Baghdad, Iraq

Zuhair Abd Hacheem
Department. of Water. Resources Engineering, Engineering College, Mustansiriyah University, Palestine St., Baghdad, Iraq

Abdul-Sahib T. Al-Madhhachi
Department. of Water. Resources Engineering, Engineering College, Mustansiriyah University, Palestine St., Baghdad, Iraq

Ring footing represents a significant structural member in different applications such as fuel or water storage tanks in addition to other structures. The advantage of this type of footing is related to the ability to reduce the weakness of some soils that may affect the safety of structures. An experimental testing program was conducted by using a small-scale model in the laboratory of the college of engineering at the university of Al-Mustansiriyah which consists of twelve ring footing models resting on loose sand reinforced by geogrid layers. The parameters that studied in this research are the diameter of ring footing, thickness of ring, the position placed of one reinforced layer and vertical spacing between two reinforced layers. The findings of this research shown that the optimum percentage of diameter ratio of ring footing is (0.25) and when the depth-ratio increases, the bearing-capacity of ring footing begin decreases. In general, the increase in ring thickness causes the bearing-capacity and the rigidity of ring foundation to increase. The optimum of the depth-ratio of the first reinforced layer is (0.25) and the optimum value of vertical-spacing bounded by layers is around (0.25) which produces a maximum value of the bearing-capacity. Its noticed that when these percentages exceeded value 0.25, the bearing-capacity of the ring foundation drops eventually.

View article

The authors would like to appreciate the great support they received from Mustansiriyah University [https://uomustansiriyah.edu.iq/?lang=en.], Baghdad-Iraq which was helpful to achieve this research.

1.      Dhatrak A. I. and Poonam G., (2016), “Behaviour of Circular and Ring Footing on Reinforced Sand”, International Journal of Engineering Science and Computing, Volume 6 Issue No. 8. PP2460-2462.

2.      Al-Tirkity J. and Al-Taay A., (2012), “Bearing capacity of eccentrically loaded strip footing on geogrid reinforced sand”, Journal of Engineering Sciences ;19(1):14-22.

3.      Boushehrian J.H. and Hataf N., (2003), “Experimental and numerical investigation of the bearing capacity of model circular and ring footings on reinforced sand”, Geotextiles and Geomembranes, 21(4), pp.241-256.

4.      Chandrawanshi S., Kumar R., Kaur D.S. and Jain D.P., (2014), “Effect of skirt on pressure settlement behaviour of model circular footing in medium dense sand”, International Journal of Advanced Engineering Technology, 5(2), pp.01-05.

5.      Chavda J. T., (2019), “Vertical Bearing Capacity of Ring Footing”, International Journal of Geotechnical Engineering, ISSN 1938- 6362.

6.      Chavda J.T. and Dodagoudar G.R., (2021), “Experimental Evaluation of Failure Zone in Sand Beneath the Ring Footing and Cutting Edge of Open Caisson Using Image Analysis”, In Proceedings of the Indian Geotechnical Conference: IGC-2019 Volume I (p. 273). Springer Nature.

7.      Das P.P., Khatri V.N. and Dutta R.K., (2019),” Bearing capacity of ring footing on weak sand layer overlying a dense sand deposit”, Geomechanics and Geoengineering, pp.1-14.

8.      Egorov K.E., (1965), “Calculation of bed for foundation with ring footing”, In Proc. 6 th International Conference of Soil Mechanics and Foundation Engineering, (Vol. 2, pp. 41-45).

9.      Ehsan B. and Ali N., (2015), “Load eccentricity effects on behavior of circular footings reinforced with geogrid sheets”, Journal of Rock Mechanics and Geotechnical Engineering, 7 (2015) 691-699.

10.   El Sawwaf M. and Nazir A., (2012), “Behavior of eccentrically loaded small-scale ring footings resting on reinforced layered soil”, Journal of Geotechnical and Geoenvironmental Engineering, 138(3), pp.376-384.

11.   Hataf N. and Baziar A., (2000), “Use of tire shreds for bearing capacity improvement of shallow footing on sand”, In Proc. of the 3rd Int. Conf. on Ground Improvement Techniques, (pp. 189-194).

12.   Jawad F.W., (2009), “Improvement of loose sand using geogrids to support footing subjected to eccentric loads”, (Doctoral dissertation, M. Sc. Thesis, University of Baghdad, Iraq).

13.   Kadhum M.Q. and Albusoda B.S., (2021), “A Review on The Performance of Ring foundations resting on reinforced and unreinforced soil” In IOP Conference Series: Materials Science and Engineering, (Vol. 1105, No. 1, p. 012086). IOP Publishing.

14.   Latha M. and Somwanshi A., (2009), “Effect of reinforcement form on the bearing capacity of square footings on sand”, Geotextiles and Geomembranes ;27(6):409- 422.

15.   Mosallanezhad M., Hataf N. and Ghahramani A., (2008), “Experimental study of bearing capacity of granular soils reinforced with innovative grid-anchor system”, Geotechnical and Geological Engineering;26(3):299-312.

16.   Ohri M.L., Purhit D.G.M. and Dubey M.L., (1997), “Behavior of ring footings on dune sand overlaying dense sand”, In Pres. International Conference of Civil Engineers, Tehran, Iran.

17.   Prasad S.D. and Chakraborty M., (2021), “Bearing capacity of ring footing resting on two layered soil”, Computers and Geotechnics, 134, p.104088.

18.   Sharma V. and Kumar A., (2018), “Behavior of ring footing resting on reinforced sand subjected to eccentric-inclined loading”, Journal of Rock Mechanics and Geotechnical Engineering, 10(2), pp.347-357.

19.   Sona S. and Soumya J., (2016), Behaviour Of Ring Footing On Geosynthetic Reinforced Sand”, International Journal of Advanced Research Trends in Engineering and Technology (IJARTET), Vol. 3, Special Issue 23.