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Abstract

This paper presents the findings of an experimental study concerning a method of reducing the settlement of shallow circular foundations on sand. It involves the use of structural skirts fixed to the edges of foundations. The experiments were performed in a large tank setting and the footing was instrumented in order to measure normal stresses and settlement. A series of tests were conducted to study the settlements of a circular footing with and without structural skirts. Test results indicate that this type of reinforcement reduces the settlement of subgrade and modifies the stress-displacement behaviour of the footing. A settlement Reduction Factor (SRF) was proposed, which takes into account the influence of various parameters that affect settlements. Results show that the use of structural skirts can produce enhanced settlement reduction in the range of 0.1 to 1.0 depending on stress applied and skirt depth. Given these levels of settlements reduction, it is concluded that the use of structural skirts to reduce the settlement of shallow foundations on dense sand is of practical significance. Further testing is recommended for different foundation shapes with structural skirts resting on different soil types. 

Keywords

Structural skirts Foundations Settlement Shallow Circular Sand

Article Details

How to Cite
Al-Aghbari, M. (2007). Settlement of Shallow Circular Foundations with Structural Skirts Resting on Sand. The Journal of Engineering Research [TJER], 4(1), 11–16. https://doi.org/10.24200/tjer.vol4iss1pp11-16
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References

  1. Akinmusure, J.O. and Akinbolade, J.A., 1981, "Stability of Loaded Footings on Reinforced Soil," J. of Geotechnical Engineering Division, American Society of Civil Engineering, Vol. 107(GT6), pp. 819- 827.
  2. Ameen, S. F., 1991, "Settlement of Inclined Loaded Footings on Sand Layers," Proceedings of the 9th Asian Regional Conference on Soil, pp. 197-200.
  3. Bazaraa, A.R., 1967, "Use of the Standard Penetration Test for Estimating Settlements of Shallow Foundations on Sand," Ph.D. Thesis, University of Illinois, USA.
  4. Binquet, J. and Lee, K. L., 1975, "Bearing Capacity Analysis of Reinforced Earth Slabs," J. of Geotechnical Engineering Division, American Society of Civil Engineering, Vol. 101(GT12), pp. 1257-1275.
  5. Bransby, M.F. and Randolph, M.F., 1998, Combined Loading of Skirted Foundation," Geotechnique, Vol. 48(5), pp. 637-655.
  6. British Standard 1377, 1990, Method of Test for Soils for Civil Engineering Purposes, British Standard Institution, London.
  7. Butterfield, R. and Andrawes, K.Z., 1970, “An Air Activated Sand Spreader for Forming Uniform Sand Beds," Geotechnique, Vol. 20(1), pp. 97 100.
  8. Das, P. M., 1999, "Principles of Foundation Engineering.
  9. Fourth Edition," PWS Publishing. Fragaszy, R.J. and Lawton, E., 1984, "Bearing Capacity of Reinforced Sand Subgrades," J. of Geotechnical Engineering Division, American Society of Civil Engineering, Vol. 110(10), pp. 1500 - 1507.
  10. Hanna, A..M. and Abdel-Rahman, M., 1987, "Experimental Evaluation of Foundation Settlement in Sand," Proc. Int. Conf. Foundations and Tunnels, University of London, Vol. 1, pp. 34-37.
  11. Mahmoud, M.A and Abdrabbo, F.M., 1989, "Bearing Capacity on Strip Footing Resting on Reinforced Sand Subgrades," Canadian Geotechical Journal, Vol. 26, pp. 154 159.
  12. Meyerhof, G.G., 1965, "Shallow Foundations," J. of Soil Mechanics and Foundation Engineering, ASCE, Vol. 91( SM2), pp. 21-31.
  13. Samtani, N.C. and Sonpal, R.C., 1989, "Laboratory Tests of Strip Footing on Reinforced Cohesive Soil," J. of Geotechnical Engineering Division, ASCE, Vol. 115(9), pp. 1326-1330.
  14. Schmertmann, J.H., 1970, "Static Cone to Compute Static Settlement Over Sand," J. of Soil Mechanics and Foundation Engineering, ASCE, Vol. 96(SE3), pp. 1011-1043.
  15. Sivakugan, N., Eckersley, J.D. and Li, H., 1998, "Settlement Predictions using Neural Networks," Australian Civil Engineering Transactions, CE 40, pp. 49-52.
  16. Sivakugan, N. and Johnson, K., 2002, "Probabilistic Design Chart for Settlements of Shallow Foundations in Granular Soils," Australian Civil Engineering Transactions, CE 43, pp. 19-24.
  17. Sivakugan, N. and Johnson, K., 2004, "Settlement Predictions in Granular Soils: A Probabilistic Approach," Geotechnique, Vol. 54(7), pp. 499-502.
  18. Terzaghi, K. and Peck, R.B., 1967, "Soil Mechanics in Engineering Practice," John Wiley and Son Inc.
  19. Verma, B.P. and Char, A.N.R., 1986, "Bearing Capacity Test on Reinforced Sand Subgrades," J. Geotechnical Engineering Division, ASCE, Vol. 112(7), pp. 701- 706.