›› 2011, Vol. 32 ›› Issue (4): 1169-1174.

• Geotechnical Engineering • Previous Articles     Next Articles

Study of preferred structural plane of subgrade slippery rock based on fuzzy comprehensive evaluation

WANG Yu1, 2, ,3，LIU Hui4，YANG Zhuan-yun4，CHAI He-jun3，TANG Sheng-chuan3，XU Qiang2   

  1. 1. School of Applied Technology, Chongqing Jiaotong University, Chongqing 400074, China; 2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China; 3. Chongqing Communications Research & Design Institute, Chongqing 400067, China; 4. Sichuan College of Architectural Technology, Deyang, Sichuan 618000, China
  • Received:2010-01-26 Online:2011-04-10 Published:2011-04-29

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Abstract:

The preferred structural plane theory has been applied to geotechnical engineering practice gradually. The fuzzy comprehensive evaluation model based on matter element method is proposed and applied to determine the preferred structural plane of rock for the first time. The states of structural plane are regarded as the objects of matter element; geometric parameters and physical parameters for evaluation as well as the corresponding fuzzy values are used to construct the composite fuzzy matter elements. The evaluation of preferred structural plane is made by calculating the relevancy. The model can deal with the uncertain factors during the preferred structural plane calculation, such as rock and soil characters, scale, occurrence, fractal indices and active state; the model provides a new way for evaluating the preferred structural plane of slippery rock. The shortcomings of traditional methods, only considering the quantity predominance but without the quality predominance are overcome in the model; and the evaluation of rock structural plane is more reasonable. This article introduces the basic theory and calculation steps of the fuzzy comprehensive evaluation by matter element method. Through introducing basic theory and operating steps, a case study is given. The model effectively ensures the objectivity and compatibility in the calculation of engineering preferred structural plane and greatly improves the calculation accuracy and efficiency.

Key words: slippery rock, preferred structural plane, matter element, fuzzy comprehensive evaluation, subgrade slope

CLC Number: 

  • TU 45
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