洞口仰坡对隧道地震稳定性的动力分析

Dynamic Study on Seismic Response of Underground Structure with Upward Slope at Entrance

本文结合ANSYS和FLAC3D软件对隧道洞口段建立模型,研究山区隧道仰坡的高度变化对隧道洞口段衬砌结构的稳定性影响,采用位移、内力等分析指标进行分析。结果表明:随着仰坡高度的增加,隧道结构监测点的位移、内力的变化均有一定的规律。研究结果对进一步揭示仰坡在地震作用下对隧道结构的稳定性影响有重要作用。

This paper aimed to study the stability response differences of the lining structure at the entrance resulting from changes in the height of upward slope of tunnels in mountain areas by displacement,internal force and other indexes in combination of ANSYS and FLAC3D software.The results showed that,there is a certain law regarding to the changes in displacement and internal force of the monitored points with the increase in the height of slope.Such a result is of great significance to the reveal of slope's effect on tunnel’s stability upon occurrence of earthquakes.