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Slip Line Theory Based Stability Analysis on the Influence of Deep Excavation on Adjacent Slope

Author

Listed:
  • Aizhao Zhou
  • Chengchao Li
  • Pengming Jiang
  • Kai Yao
  • Na Li
  • Wei Wang

Abstract

The impact of deep excavation to the stability of adjacent slope is evaluated based on the slip line theory. Stress field of slope under various excavation conditions is simulated by finite element method, while slip line field is determined by non-associated flow rule. Factor of safety is obtained by integrating the skid-resistance and the shear stress on each slip line, and the slip line with minimum factor of safety corresponds to the critical slip surface. Two typical displacement constraint boundaries are considered. The results indicate that the critical slip surface moves towards to the slope surface and develops downwards. The factor of safety decreases with the excavation process. For flexible displacement constraint boundary, large deformation of supporting pile causes obvious variation of critical slip surface and factor of safety. In terms of the stiff displacement constraint boundary with internal supports, deep excavation only has limited effect on the slope stability.

Suggested Citation

  • Aizhao Zhou & Chengchao Li & Pengming Jiang & Kai Yao & Na Li & Wei Wang, 2018. "Slip Line Theory Based Stability Analysis on the Influence of Deep Excavation on Adjacent Slope," Mathematical Problems in Engineering, Hindawi, vol. 2018, pages 1-7, June.
    • Handle: RePEc:hin:jnlmpe:2041712
    DOI: 10.1155/2018/2041712
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