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《Chinese Journal of Underground Space and Engineering》 2011-02
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Optimization of Rock Mass Dynamic Classification of Large Span Road Tunnel Based on Bayes

Ma Chaofeng,Li Xiao,Cheng Guowen,He Jianming(Key Laboratory of Engineering Geomechanics,Institute of Geology and Geophysics,Chinese Academy of Sciences, Beijing 100029,China)  
Based on the Bayesian statistics,the dynamic classification message of the same or similar engineering rock mass is fully considered.The probability models of the prior distribution and the posterior distribution of are founded,the expressions of the super-parameters of the posterior distribution are deduced,and further the confidence interval of at 1-α confidence level is obtained.Then the dynamic classification results of rock mass are optimized in order to weaken the subjective difference caused by human factors.Taking a road tunnel as example,the feasibility of this approach is validated.It is shown that the subjective difference is weakened by the optimized dynamic classification effectively.Hence,the classification results based on Bayesian statistics are more rational.
【Fund】: 国家重点基础研究发展计划(973)项目(2009CB724605 2010CB731501);; 国家自然科学基金资助项目(40702052);; 中国科学院知识创新工程重要方向项目(KJCX3-SW-L1 KZCX2-YW-109)
【CateGory Index】: U452.12
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