偏压隧道地形偏压对隧道稳定性研究
投稿时间:2019-03-05  修订日期:2019-03-05  点此下载全文
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作者单位E-mail
代树林 吉林大学建设工程学院 386101953@qq.com 
万怡祯 吉林大学建设工程学院 970436346@qq.com 
张永春 中建三局工程设计有限公司 1552321947@qq.com 
基金项目:吉林省交通厅科技项目:公路偏压隧道围岩稳定与施工方法研究(2014-4-1-10-2)
中文摘要:地表倾角不同是偏压隧道的一种原因,由于地表不对称,隧道两侧受力状况不同,从而容易对隧道衬砌产生破坏。采用有限元分析方法研究了不同地表倾角,隧道周围变形过程及隧道锚杆和塑性区分布特征,得出了隧道围岩变形随着地表倾角增大而增大,且隧道深埋侧变形和锚杆轴力大;隧道在地表倾角大于30°,隧道受地形偏压影响明显,深埋侧塑性区扩大,可为受地形偏压的隧道设计提供一定的理论依据及施工建议。
中文关键词:地表倾角  隧道变形  偏压隧道  数值模拟
 
Study on the stability of biased tunnel in topographical uneven pressure
Abstract:Different surface dig angles is one of the reasons for the biased tunnel. Due to the surface asymmetry, the force on both sides of the tunnel is different, which is easy to damage the lining of the tunnel. The finite element analysis method was used to study different surface dig angel, the deformation process around the tunnel and the distribution characteristics of tunnel bolt and plastic zone. Tunnels in the earth"s surface dig angle greater than 30°,the tunnel affected by bias is clear and the plastic zone of the deep side is enlarged, which can provide some theoretical basis and construction suggestions for tunnel design under topographic bias.
keywords:surface dip angle  deformation  bias tunnel  numerical simulation
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