›› 2012, Vol. 33 ›› Issue (6): 1795-1800.

• Geotechnical Engineering • Previous Articles     Next Articles

Fuzzy random reliability analysis of slope based on fuzzy point estimate method

WANG Yu1, 2, 3，JIA Zhi-gang1，LI Xiao2，WANG Can1，YU Hong-ming1   

  1. 1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China; 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; 3. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
  • Received:2010-12-15 Online:2012-06-11 Published:2012-06-14

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Abstract: The fuzzy point estimate method of slope engineering reliability evaluation is presented based on the statistical moment point estimate method and fuzzy random theory. The slope stability limit state equation is transformed from fuzzy random set to normal random set, then the point estimation method is used to solve the slope reliability indexes. In view of the approximate distribution types for physico-mechanical parameters of rock mass, the normal fuzzy number, which is different from the normal number is used to do fuzzy random variable. By doing this, the physico-mechanical parameters are closer to its real distribution types. The fuzziness of various mechanical parameters is considered. The calculation results can reflect the true working condition of slope. A case study shows that the method has a higher calculation efficiency and reliable calculation results, and it is convenient in use; it also avoids the shortcomings of traditional methods. The method has great potential for slope reliability analysis of complex slope or functions for implicit expression; it provides a new way to slope reliability analysis and has a broad prospect of application.

Key words: slope engineering, fuzzy random reliability, fuzzy point estimate method, normal fuzzy number, reliability index

CLC Number: 

  • TU 457
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