Commenced in January 2007
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Effect of Cavities on the Behaviour of Strip Footing Subjected to Inclined Load

Authors: Ali A. Al-Jazaairry, Tahsin T. Sabbagh

Abstract:

One of the important concerns within the field of geotechnical engineering is the presence of cavities in soils. This present work is an attempt to understand the behaviour of strip footing subjected to inclined load and constructed on cavitied soil. The failure mechanism of strip footing located above such soils was studied analytically. The capability of analytical model to correctly expect the system behaviour is assessed by carrying out verification analysis on available studies. The study was prepared by finite element software (PLAXIS) in which an elastic-perfectly plastic soil model was used. It was indicated, from the results of the study, that the load carrying capacity of foundation constructed on cavity can be analysed well using such analysis. The research covered many foundation cases, and in each foundation case, there occurs a critical depth under which the presence of cavities has shown minimum impact on the foundation performance. When cavities are found above this critical depth, the load carrying capacity of the foundation differs with many influences, such as the location and size of the cavity and footing depth. Figures involving the load carrying capacity with the affecting factors studied are presented. These figures offer information beneficial for the design of strip footings rested on underground cavities. Moreover, the results might be used to design a shallow foundation constructed on cavitied soil, whereas the obtained failure mechanisms may be employed to improve numerical solutions for this kind of problems.

Keywords: Axial load, cavity, inclined load, strip footing.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1340096

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References:


[1] M. Ornek, Estimation of ultimate loads of eccentric-inclined loaded strip footings rested on sandy soils. Neural Computing & Applications, 2014. 25(1): p. 39-54.
[2] A. A. Lavasan, A. Talsaz, M. Ghazavi, and T. Schanz, Behavior of Shallow Strip Footing on Twin Voids. Geotechnical and Geological Engineering, 2016: p. 1-15.
[3] R. L. Baus, and M. C. Wang, Bearing Capacity of Strip Footing above Void. Journal of Geotechnical Engineering-Asce, 1983. 109(1): p. 1-14.
[4] A. Badie, and M. C. Wang, Stability of Spread Footing above Void in Clay. Journal of Geotechnical Engineering-Asce, 1984. 110(11): p. 1591-1605.
[5] D. K. Crapps, The Effects of Cavities upon Foundation Design & Construction. in Art of Foundation Engineering Practice. 2010. ASCE.
[6] J. H. Atkinson, and A. M. Cairncross. Collapse of a shallow tunnel in a Mohr-Coulomb material. in Proceedings of the Symposium on the Role of Plasticity in Soil Mechanics, Cambridge, UK. 1973.
[7] J. H. Atkinson, E. T. Brown, and D.M. Potts, Collapse of shallow unlined tunnels in dense sand. Tunnels and Tunneling, 1975. 7(3): p. 81-87.
[8] J. H. Atkinson, and D. M. Potts, Stability of a Shallow Circular Tunnel in Cohesionless Soil. Geotechnique, 1977. 27(2): p. 203-215.
[9] R. L. Baus, The stability of shallow continuous footings located above voids. 1978, Pennsylvania State University, at University Park, Pennsylvania, USA.
[10] M. C. Wang, and R. L. Baus. Settlement behavior of footing above a void. in Proceedings of the 2nd conference on ground movement and structures. Cardiff, UK. 1980.
[11] M. C. Wang, and C.W. Hsieh, Collapse Load of Strip Footing above Circular Void. Journal of Geotechnical Engineering-Asce, 1987. 113(5): p. 511-515.
[12] G. Azam, M. Jao, and M. C. Wang, Cavity effect on stability of strip footing in two-layer soils. Geotechnical Engineering, 1997. 28(2).
[13] M. Jao, and M. C. Wang, Stability of strip footings above concrete-lined soft ground tunnels. Tunnelling and Underground Space Technology, 1998. 13(4): p. 427-434.
[14] L. J. Aziz, Influence of water on the behavior of strip footing above a cavity, in Department of Building and Construction Engineering. 2002, University of Technology/Iraq.
[15] M. Kiyosumi, O. Kusakabe, M. Ohuchi, and F. Le Peng, Yielding pressure of spread footing above multiple voids. Journal of Geotechnical and Geoenvironmental Engineering, 2007. 133(12): p. 1522-1531.
[16] S. M. Nawghare, S. R. Pathak, and S. H. Gawande, Experimental investigations of bearing capacity for eccentrically loaded footing. Int J Eng Sci Technol, 2010. 2(10): p. 5257-5264.
[17] M. D. Bolton, The strength and dilatancy of sands. Geotechnique 1986. 36(1): p. 65-78.
[18] M. C. Wang, and A. Badie, Effect of Underground Void on Foundation Stability. Journal of Geotechnical Engineering-Asce, 1985. 111(8): p. 1008-1019.