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Volume 34 Issue 9
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QIN Hui-lai, CHEN Zu-yu, LIU Li-peng. Basal stability analysis for excavations in soft clay based on upper bound method[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(9): 1611-1619.
Citation: QIN Hui-lai, CHEN Zu-yu, LIU Li-peng. Basal stability analysis for excavations in soft clay based on upper bound method[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(9): 1611-1619.
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Basal stability analysis for excavations in soft clay based on upper bound method

  • 1. Technical Center, China State Construction Engineering Corporation, Beijing 101300, China; 2. Department of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research, Beijing 100048, China

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  • Received Date: June 22, 2011
  • Published Date: October 09, 2012
    Graphical Abstract
    • Abstract
  • The multi-block upper bound method is a good choice for the stability analysis problems in the geotechnical engineering. It is simple, highly effective and of rigorous theoretical basis. According to the usage process of the multi-block upper bound method, some simplifications are made for the basal stability analysis of braced cuts in clay. After the simplifications, a new method based on the upper bound method is proposed for the basal stability analysis, and the detailed calculation process is discussed. Considering different soil strength indices used in practice, the calculation methods for consolidated-undrained strength and unconsolidated-undrained strength are put forward respectively, and they can be used in practice at home and abroad. Several calculations are presented to analyze the effects of some important factors on the basal stability safety. Finally, a real excavation case is calculated and comparisons are made with the methods recommended in the codes to examine the proposed method.
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    • References (17)
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