›› 2018, Vol. 39 ›› Issue (6): 1955-1962.doi: 10.16285/j.rsm.2016.1800

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Upper bound of ultimate bearing capacity for the reinforced grounds

CAO Wen-gui1, TAN Jian-hui1, HU Wei-dong1, 2   

  1. 1. Geotechnical Engineering Institute, Hunan University, Changsha, Hunan 410082, China; 2. College of Civil Engineering and Architecture, Hunan Institute of Science and Technology, Yueyang, Hunan 414000, China
  • Received:2016-09-23 Online:2018-06-11 Published:2018-07-03
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51378198) and the Research Fund for the Doctoral Program of Higher Education of China (20130161110017).

Abstract: The horizontal reinforcement is a method of ground treatment for soft soil. The calculation of the ultimate bearing capacity of the reinforced grounds is important to the design of ground foundation treatment. Firstly, combined with the engineering characteristics of reinforced grounds, a changeable failure mode varying with the reinforcement parameters and the kinematically admissible velocity field are established by its failure mechanism considering the influence of the coordinate deformation between soil and the horizontal reinforcement. Secondly, with the upper limit analysis, the ultimate bearing capacity calculation was deduced by the method of energy dissipation for the level reinforcement. Thirdly, a new approach for determining the ultimate bearing capacity of the reinforced grounds is introduced by the sequential quadratic programming optimization algorithm. Finally, the comparisons with experimental results find that this proposed method is reasonable, feasible, and superior to other existing methods, also can reflect the reinforcement design parameters effect on the failure mode and its ultimate bearing capacity.

Key words: reinforced grounds, ultimate bearing capacity, upper limit analysis, movable failure mode, deformation coordination

CLC Number: 

  • TU 432

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