Stability of an unsupported vertical circular excavation in clays under undrained condition |
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| Authors: | Vishwas N Khatri Jyant Kumar |
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| Institution: | Civil Engineering Department, Indian Institute of Science, Bangalore 560 012, India |
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| Abstract: | By using the axisymmetric finite elements static limit analysis formulation, proposed recently by the authors, the stability numbers (γH/co) for an unsupported vertical circular excavation in clays, whose cohesion increases with depth, have been determined under undrained condition; γ = unit weight, H = height of the excavation and co = cohesion along ground surface. The results are obtained for various values of H/b and m; where b = the radius of the excavation and m = a non-dimensional parameter which accounts for the rate of the increase of cohesion with depth. The values of the stability numbers increase continuously both with increases in H/b and m. The results obtained in this study compare well with those available in literature. |
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| Keywords: | Axisymmetric problems Excavation Limit analysis Optimization Plasticity |
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