YU Zheng, YANG Long-cai, ZHANG Yong, et al. Uncertainty analysis of tunnel surrounding rock deformation considering consistency of geological heterogeneity features[J]. 2019, 40(5): 1947-1956.
YU Zheng, YANG Long-cai, ZHANG Yong, et al. Uncertainty analysis of tunnel surrounding rock deformation considering consistency of geological heterogeneity features[J]. 2019, 40(5): 1947-1956.DOI: 10.16285/j.rsm.2018.1252.
Most analyses of geological heterogeneity are based on the assumption of repetitive deposition and stationary transition probabilities. However
the effects of tectonism and weathering are ignored
which leads to the absence of consistency verification of geological heterogeneity features(GHFs). A test method for the consistency of GHFs is herein proposed
as well as a partition method to detect stationary Markovian zones. The correlation coefficients between local transition probability matrices are adopted as quantitative criteria of consistency. The stratigraphic distribution is simulated by the coupled Markov chain model
and the deformation analysis of surrounding rock uncertainty is accomplished through Monte-Carlo simulations. Taking advantage of the borehole data in Tsingtao
the effect on stratigraphic distribution and uncertainty analyses induced by the consistency of GHFs is discussed
and the effectiveness of the proposed method is illustrated. The results indicate that the accuracy of uncertainty analyses cannot be improved with increased number of boreholes when there are conflicting GHFs. After the consistency verification of GHFs and the partition of stationary Markovian zones
the absence of local features can be avoided to improve the accuracy of uncertainty analyses of surrounding rock deformation.