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Impact of Crack on Stability of Slope with Linearly Increasing Undrained Strength

Author

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  • Bing Li
  • Fei Zhang
  • Di Wang

Abstract

This paper presents a procedure for assessment of the impact of tension crack on stability of slope in clays with linearly increasing undrained strength. The procedure is based on the limit equilibrium method with variational extremization. The distribution of the normal stress over slip surface is mathematically obtained for slopes in clays with the linearly increasing undrained strength and then used to determine the tension crack for clays with zero tensile strength. The seismic effect is also included using the pseudostatic approach. Closed-form solutions to the minimum safety factor and the maximum crack depth can be derived and given in the form of chart for convenient use. The results demonstrate a significant effect of the tension crack on the stability of steep slopes, especially for strong seismic conditions. In this situation, neglecting the impact of tension crack in traditional analyses may overestimate the slope safety. The most adverse location of the tension crack can be also determined and presented in the charts, which may be useful in designing reinforcements and remedial measures for slope stabilization.

Suggested Citation

  • Bing Li & Fei Zhang & Di Wang, 2018. "Impact of Crack on Stability of Slope with Linearly Increasing Undrained Strength," Mathematical Problems in Engineering, Hindawi, vol. 2018, pages 1-11, April.
    • Handle: RePEc:hin:jnlmpe:1096513
    DOI: 10.1155/2018/1096513
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