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Volume 39 Issue z2
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ZHENG Gang, ZHANG Tao, CHENG Xue-song. Effect of foundation piles on excavation stability and its calculation[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(z2): 5-8. DOI: 10.11779/CJGE2017S2002
Citation: ZHENG Gang, ZHANG Tao, CHENG Xue-song. Effect of foundation piles on excavation stability and its calculation[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(z2): 5-8. DOI: 10.11779/CJGE2017S2002
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Effect of foundation piles on excavation stability and its calculation

  • 1. School of Civil Engineering, Tianjin University, Tianjin 300072, China;
    2. Key Laboratory of Coast Civil Structure Safety (Tianjin University), Ministry of Education, Tianjin 300072, China

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  • Received Date: August 01, 2017
  • Published Date: December 19, 2017
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    • Abstract
  • Using the finite difference method and the limit equilibrium method, the failure modes of excavations and the effect of foundation piles in excavations on excavation stability are investigated. The following conclusions are drawn: (1) The foundation piles can improve the safety factor of stability to certain degree. (2) Instability sliding surface of excavations with single level of horizontal struts is close to the circular slip surface rotating about the supporting point of the strut. (3) When instability of excavations occurs, the foundation piles tend to be subjected to bending failure rather than shear failure. While taking the contribution of foundation piles into consideration, the smaller value between the equivalent shear strength and real shear strength should be used.
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    • References (7)
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