Stability of Spread Footing Above Void in Clay
Publication: Journal of Geotechnical Engineering
Volume 110, Issue 11
Abstract
The stability of spread footing situated above a continuous void was investigated. The study involved a theoretical analysis and a model footing testing. The theoretical analysis was made using the finite element method in which the foundation soil was idealized as an elastic perfectly plastic material. The model footing testing was performed on a commercially available kaolinite, which was compacted to 95% compaction based on the standard Proctor compactive effort. The model footing test results were compared with those obtained from the finite element analysis. As a result of this study, a three‐dimensional finite element computer program was developed. Using this computer program, the stability of spread footing was analyzed for different conditions. The results of the analysis indicate that there is a critical region under the footing. Only when the void is located within this region will the footing performance be significantly affected by the presence of the void. The size of the critical region depends on several factors such as footing shape, soil property, void size and void shape. When the void is lócated within the critical region, the bearing capacity of the footing varies considerably with the void location.
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References
1.
Atkinson, J., and Cairncross, A., “Collapse of a Shallow Tunnel in a Mohr‐Coulomb Material,” Proceedings of the Symposium on the Role of Plasticity in Soil Mechanics, Cambridge, Mass., 1973, pp. 202–206.
2.
Atkinson, J., Brown, E., and Potts, D., “Collapse of Shallow Unlined Tunnels in Dense Sand,” Tunnels and Tunnelling, Vol. 7, No. 3, May–June, 1975, pp. 81–87.
3.
Atkinson, J., and Potts, D. M., “Stability of a Shallow Circular Tunnel in a Cohesionless Soil,” Geotechnique 27, No. 2, 1977, pp. 203–215.
4.
Badie, Ahmad, “Stability of Spread Footing Supported by Clay With an Underground Void,” thesis presented to The Pennsylvania State University, at University Park, Pa., in 1983, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
5.
Baus, R. L., “The Stability of Shallow Continuous Footings Located Above a Void,” thesis presented to The Pennsylvania State University, at University Park, Pa., in 1978, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
6.
Baus, R. L., and Wang, M. C., “The Bearing Capacity of Strip Footing Located Above a Void in Cohesive Soils,” Journal of the Geotechnical Engineering Division, ASCE, Vol. 109, No. 1, Jan., 1983, pp. 1–14.
7.
Chang, C. Y., Nair, K., and Singh, R., “Finite Element Method and Time‐Dependent Analysis of Geotechnical Problems,” Analysis and Design in Geotechnical Engineering, Conference Proceedings, ASCE, Austin, Tex., Vol. 1, June, 1974, pp. 269–301.
8.
Davis, E. H., Gunn, M. J., Mair, R. J., and Seneviratne, H. N., “The Stability of Shallow Tunnels and Underground Openings in Cohesive Material,” Geotechnique 30, No. 4, 1980, pp. 397–416.
9.
Duncan, J. M., and Chang, C. Y., “Nonlinear Analysis of Stress and Strain,” Journal of the Soil Mechanics and Foundation Division, ASCE, Vol. 96, No. SM5, Sept., 1970, pp. 1629–1653.
10.
Drucker, D., and Prager, W., “Soil Mechanics and Plastic Analysis in Limit Design,” Quarterly of Applied Mathematics, Vol. 10, No. 2, 1952, pp. 157–165.
11.
Ghaboussi, J., Ranken, R. E., and Karshenas, M., “Analysis of Subsidence over Soft‐Ground Tunnels,” Proceedings of International Conference on Evaluation and Prediction of Subsidence, ASCE, 1979, pp. 182–196.
12.
Ghaboussi, J., Hansmire, W. H., Parker, H. W., and Kim, K. J., “Finite Element Simulation of Tunneling over Subways,” Journal of Geotechnical Engineering, ASCE, Vol. 109, No. 3, Mar., 1983, pp. 318–334.
13.
Reyes, S. F., “Elastic‐Plastic Analysis of Underground Openings by the Finite Element Method,” thesis presented to the University of Illinois, at Urbana, Ill., in 1966, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
14.
Reyes, S., and Deere, D., “Elastic‐Plastic Analysis of Underground Openings by the Finite Element Method,” Proceedings of the 1st International Congress Rock Mechanics, Lisbon, Vol. 2, 1966, pp. 447–483.
15.
Wang, M. C., and Baus, R. L., “Settlement Behavior of Footing Above a Void,” Second Conference on Ground Movements and Structures, Cardiff, U.K., 1980, pp. 168–184.
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Published In
Journal of Geotechnical Engineering
Volume 110 • Issue 11 • November 1984
Pages: 1591 - 1605
Copyright
Copyright © 1984 ASCE.
History
Published online: Nov 1, 1984
Published in print: Nov 1984
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