黄土隧道围岩稳定性粘弹塑性有限元分析
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摘要
模拟分析黄土隧洞围岩稳定性对了解黄土隧洞变形破坏机理,对黄土隧洞设计施工理论具有重要意义。采用粘弹塑性模型对黄土隧道围岩进行有限元分析,研究围岩的变形规律,探讨围岩位移场分布,并同真实试验黄土隧道的侧面无衬砌和半衬砌两种工况各 3 种状态的变形破坏结果进行比较,发现用有限元方法模拟的结果与真实隧道的变形破坏过程基本吻合,此结果可为类似的黄土隧道工程的设计施工提供参考。
It is important to analyze the stability of surrounding loess of tunnel for understanding its failure mechanism and for its design and construction. The stability of surrounding loess of tunnel using visoelasto-plastic constitutive model has been studied on its deformation distribution. Compared with the experimental description of deformation of surrounding loess of tunnel for a variety of geometry configuration in situ, The calculated results are coincident with the experimental results so as to help the design and construction of loess tunnels.
引文
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