Abstract：According to tunnel boring machine(TBM) advance rate，surrounding rockmass is classified into 4 grades，i. e. good，comparatively good，comparatively bad and bad in working condition. Based on fuzzy mathematics method，two indices of uniaxial compressive strength UCS and rock mass integrity index KV are adopted；and their membership functions of the 4-grade classification of rock mass about TBM construction are established. Meanwhile，Sigmoid function is adopted to depict the weight of UCS and KV rather than a constant as QTBM and traditional fuzzy mathematics method. Based on the maximum membership degree criterion of fuzzy mathematics，the rockmass quality of TBM construction could be classified. Applications of three construction cases show that the prediction results coincide well with the TBM construction advance rate reality. The classification method is simple and feasible；and it can be put into practice.
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何发亮，谷明成，王石春. TBM施工隧道围岩分级方法研究[J]. 岩石力学与工程学报，2002，21(9)：1 350-1 354.(HE Faliang，GU Mingcheng，WANG Shichun. Study on surrounding rockmass classification of tunnel cut by TBM[J]. Chinese Journal of Rock Mechannics and Engineering，2002，21(9)：1 350-1 354.(in Chinese))
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2011, Vol. 30 
