Significant Analysis of Soft Rock Tunnel Disaster-Causing Factors Based on Orthogonal Test

Abstract:

The impacting effect of lithological features, tectonic stress, the mechanical parameters, structure surface contrasts were comparative analysis, to explore the effect from mentioned factors to surrounding rock-lining in schist tunnel. In order to make sure the dependence relationship of large deformation with these factors, the significant and interaction on large deformation in rock-mess and lining mechanical mechanism were studied according to the experiment data and statistics theory. The result shows that elastic modulus E, side pressure coefficient λ, and joint spacing S have obvious influence on the mechanical properties of surrounding rock-lining, and there is interaction among them. Furthermore, the influence of the interaction between S and λ to rock-lining is found to be significant, and there is an obviously dependent relationship between anchor failure and joints spacing. Therefore, when discussing the reduction measures to avoid the large deformation, the most appropriate method is to study it in overall factors and with the interaction.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 1331-1337
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.1331
• Online since: November 2012
• Authors: Jian Ping Chen, Ying Xu, Chang Qun Zuo, Yi Yi
• Keywords: Hazard-Formative Factors, Interaction, Orthogonal Test, Significant, Soft Rock Tunnel

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