Soil Engineering and Foundation

›› 2016, Vol. 30 ›› Issue (3): 380-382.

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Determinations of Shear Strength Parameters of Jointed Rock with Fuzzy Random Theory

ZOU Fei1,2,3, TANG Xu1,4, FANG Zhengfeng1,4   

  1. (1.Guizhou Transportation Planning Survey & Design Institute Co., Ltd., Guiyang 550081;
    2.School of Civil Engineering, Central South University, Changsha 410075;
    3.Construction Engineering Quality Supervision Bureau of Guizhou Province, Guiyang 550000;
    4.College of Resources and Environment Engineering, Guizhou University, Guiyang 550003)
  • Received:2016-05-24 Revised:2016-06-01 Online:2016-06-20 Published:2016-06-21

Abstract: The shear strength parameters of jointed rock mas have the characteristics of fuzziness and randomness. In this paper, the possible values and their distribution pattern can be represented by an asymmetric triangular fuzzy formula. The fuzzy optimization can be achieved by using the area of the triangular function under certain region and using the weighted average of het possible strength parameter values as the targeted function. The truncated set level h of the asymmetric triangular fuzzy number can be determined through 3 sigma method. This provides a new approach for the optimization of the geotechnical engineering projects. The least square linear regression analysis indicate that his method can be reasonably applied in the practical projects.

Key words: Jointed Rock Shear Strength, Asymmetric Triangular Fuzzy Numbers, Fuzziness, Possible Distribution Region