不同变形失稳模式下隧道围岩稳定性判据研究的进展

Development of Stability Criteria for Rock Mass Surrounding a Tunnel under Different Failure Modes

计算机模拟隧道围岩失稳研究的困难在于失稳模型不清楚、失稳判据不明确。本文综合分析了目前国内外应用的隧道稳定性判别方法,总结了不同变形失稳机制下的计算模型及其量化的破坏判据,分析了各种方法的研究进展和存在局限,为围岩稳定性数值模拟提供快速、合理、可操作的判据。

In research on the stability of rock mass surrounding a tunnel, there are two major difficulties： determining the failure mode and confirming the failure criterion. On the basis of various methods for the stability analysis prevalent at home and abroad, this paper describes calculate models and their quantitative failure criterions under different deformation mechanisms, analyses the development and limitation of the different methods, and puts forward operational criterions for quick and appropriate evaluation of the rock stability surrounding a tunnel.