Dynamic Comprehensive Evaluation Model for Surrounding-Rock Stability Based on Variation Speed Characteristics of Measurements
(1 College of Civil Engineering, Chongqing University, Chongqing 400045; 2 College of Civil & Architecture Engineering, China Three Gorges University, Yichang 443002; 3 Key Laboratory of New Technology for Construction of Cities in Mountainous Area, Chongqing University, Chongqing 400045; 4 Changjiang Institute of Survey, Planning, Design and Research, Changjiang Water Resources Commission, Wuhan 430072)
Abstract：
Considering that the mechanical behaviors of surrounding rock are affected by various factors, the comprehensive evaluation model of surrounding-rock stability is being accepted by more and more researchers. Monitoring and measuring are the most direct ways of reflecting the stress and deformation state of surrounding rock, since the characteristic of variation speed is the important indicator of surrounding-rock stability. As for the establishment of a comprehensive evaluation model for surrounding-rock stability, the time factor must be taken into account to provide a dynamic evaluation. In light of the advantage of incorporating both variation speed and its trend, a modeling method and the relevant evaluation criteria for the dynamic comprehensive evaluation model for surrounding-rock stability are put forward. From the perspective of multiple factors, this model can measure the variation speed of evaluated targets in multiple time periods comprehensively. The model is also appropriate for short-time monitoring, or a case when the correspondence between simulated and measured results is not good enough. The feasibility of the model is verified by the Huayinshan tunnel, providing a new approach for evaluating the surrounding-rock stability.
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.Dynamic Comprehensive Evaluation Model for Surrounding-Rock Stability Based on Variation Speed Characteristics of Measurements[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(4): 53-57
2014, Vol. 51 