›› 2008, Vol. 29 ›› Issue (6): 1654-1658.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research of FEM stability analysis of soil Nailing support for foundation pit

ZHAO Jie1, SHAO Long-tan2   

  1. 1. The R&D Center of the Civil Engineering Technology, Dalian University, Dalian 116622, China; 2. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, Chian
  • Received:2006-09-15 Online:2008-06-10 Published:2013-07-15

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Abstract: In connection with slope stability of soil nailing support for foundation pit, the authors discuss the shortcomings of limit equilibrium method and indicate that the FEM stability analysis is new trend to evaluate the stability of foundation pit. The slip surface stress analysis method and strength reducion method are used to analyze the stability of soil nailing support for foundation pit. For the slope without supporting foundation pit, the results of safety factor and critical slip surface obtained by two finite element methods are consistent and the shapes of critical slip surface keep sameness with the reduction of strength parameters with soil. For the slope with soil nailing support for foundation pit, the safety factors by two finite element methods are consistent; but the shapes of critical slip surface are inconsistent in different stages. The reason is that only the strength of the soil and the cement deep mixing pile are reduced during the process in the calculation; and the strength parameters of the nail bar are regarded as constant. Finally, the authors indicate whether or not considering the reduction of soil in strength reducion method with FEM waits for further research.

Key words: stability of foundation pit, FEM, strength reducion, slip surface stress analysis method, factor of safety, soil nailing

CLC Number: 

  • TU 470
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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