【摘要】 强度折减法和具有拉和剪破坏分析功能的大型有限差分程序FLAC相结合,并将其引入到静力隧洞的稳定性分析中。首先对黄土无衬砌隧洞静力破坏机制进行了数值分析,在此基础上进行了一个简单的隧洞静力模型试验,数值分析结果在静力模型试验中得到了验证,同时说明FLAC强度折减法能够用于隧洞静力稳定分析,进而计算得到隧洞静力稳定安全系数。为下一步黄土隧道的地震反应分析和有衬砌黄土隧道动力稳定性分析奠定了基础,也为隧道修建和运营期间的稳定性提供了依据。更多还原

【Abstract】 Strength reduction method is combined with large-scale finite difference code FLAC containing the tension and shear failure analysis,and it is introduced into the static stability analysis of tunnel.First,a numerical analysis was conducted on the loess unlined tunnel static failure mechanism,then,on this basis,a simple static model tunnel test was carried out,the numerical analysis results have been verified by the static model test.It indicates that the strength reduction FLAC can be used for static stability analysis on the tunnel,and then,the static stability factor of safety tunnel is calculated.It has formed foundation for further analysis of the seismic response of loess tunnel lining and tunnel dynamic stability analysis of loess foundation,but also provided the basis for the stability of the tunnel during the construction and operation period.更多还原