Influence of high geo-stress on dynamic response analysis of mountain tunnels

被引：0
|
作者：
机构：
[1] Fan, Shuli
[2] Chen, Jianyun
[3] Jia, Qingwen
来源：
Chen, Jianyun (eerd001@dlut.edu.cn) | 2003年 / E-Journal of Geotechnical Engineering卷 / 21期
基金：
中国国家自然科学基金;
关键词：
Sensitivity analysis - Uncertainty analysis - Landforms - Seismic response - Tunnels - Dynamic response;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The safety of mountain tunnels located in regions of high seismic intensity in recent earthquakes has been questioned. To sufficiently analyze the influence of high geo-stress conditions on tunnels under earthquake excitation, a series of numerical models corresponding to each condition were built based on a western tunnel project. Considering the uncertainty of the geo-stress value due to inevitable error of sampling, several work conditions corresponding to each value were computed and compared. Sensitivity analyses indicate that the horizontal geo-stresses cause shear action on the tunnel linear. If the lateral pressure coefficient of geo-stress exceeds a certain value, the tunnel linear possibly will be damaged. In addition, a geo-stress impact factor was proposed to reflect the influence of geo-stress on the dynamic response of mountain tunnel. It is found that effect of geo-stress plays an important role in the deep-buried tunnels than in shallow-buried tunnels. © 2016 ejge.
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